Current Research

Our research interests are aligned along the following themes:

  • Solid-state inorganic materials exhibiting unusual chemical bonding motifs and electronic instabilities
  • Spectroscopy and chemical imaging of the electronic structure of 2D materials, nanomaterials, and interfaces
  • Developing metal—organic syntheses for the rational growth of metal oxide and oxyhalide nanocrystals
  • Functional nanocomposites and thin films with an emphasis on corrosion inhibition and lightweighting
  • Much of our research program is directed at understanding the interplay between geometric and electronic structure at interfaces as well as in solid-state materials and to examine how this translates to functional properties. Our research thus spans the range from materials synthesis, mechanistic understanding of crystal growth processes, and structural characterization to device integration and mechanistic studies of catalysis and intercalation phenomena. We further seek to translate fundamental understanding of interfaces and materials to develop functional thin films and devices for a wide range of applications ranging from Mott memory to thermochromic window coatings and thin films for the corrosion protection of steel.

    Cover articles

    1. Colossal Metal—Insulator Transition Materials
    Perhaps the most ubiquitous example of a phase transition is the melting of ice to liquid water. In our research, we are especially interested in solid—solid phase transformations that can be as dramatic in terms of changes in physical properties and are quite significant for technological applications. In particular, we are interested in phase transitions that are accompanied by abrupt changes in electronic properties (metal—insulator transitions, charge ordering—delocalization, charge density waves). In much of our research, we use binary and ternary vanadium oxides as our primary test cases to explore the influence of finite size and doping on metal—insulator phase transitions as well as to extract design principles for stabilization of new charge ordering motifs in mixed-valence solid-state compounds. This approach has enabled the rational design of novel ternary vanadium bronze phases characterized by colossal metal insulator transitions that span several orders of magnitude.

    Metal-insulator transition
    A rather practical application of the pronounced above-room temperature metal—insulator transitions of VO2 and ternary vanadium oxide bronzes is as dynamic glazing components for "smart" window coatings designed to improve the energy efficiency of buildings. The infrared part of the solar spectrum is primarily responsible for the heating of interiors (solar heat gain). The metallic phase of vanadium oxides tend to be infrared reflective and preclude solar heat gain, thereby preventing the heating of interiors at high ambient temperatures; however, at low temperatures, a phase transition to the insulating phase occurs and being infrared transparent, this phase permits solar radiation to heat the interiors.

    Smart Window
    Our primary goal in this area is to develop a detailed understanding of the structural phase progression and alterations in local geometric and electronic structure as strongly correlated materials undergo electronic phase transitions. Fundamental mechanistic understanding of the phase transitions is used to inform the design of novel doping schemes and entirely new compositions that exhibit colossal metal—insulator transitions. We have enjoyed considerable success with this rational design approach, obtaining precise control over charge ordering motifs and leading to the discovery of numerous compounds exhibiting colossal metal—insulator transitions in close proximity to room temperature. Ongoing research focuses on designing quantum corral structures based on precise and tunable separation of charge along 1D tunnels and layers of vanadium oxide bronze structures.

    2. Measuring and Mapping Electronic Structure
    A major thrust of our research program involves examination of chemical bonding at interfaces of graphene with metals, dielectrics, and organic molecules through the development of polarized near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and scanning transmission X-ray microscopy (STXM) tools in conjunction with electrical transport measurements and density functional theory modeling. In a similar vein, we are using these techniques to study lithiation processes in Ag2VO2PO4 and V2O5 to inform the design of cathode materials for Li-ion batteries.
    Using polarized NEXAFS in conjunction with STXM allowed us to map local electronic corrugations of free-standing graphene grown via chemical vapor deposition (Nat. Commun. 2011, 2, 372/1-8), and to detect locally doped regions. The corrugations and doped regions represent some of the most formidable impediments that need to be resolved for manifestation of true Dirac physics in graphene.
    In other work, we observed the substrate hybridization of the graphene Π cloud with dz2 orbitals of Cu and Ni substrates when graphene is grown atop these metals by chemical vapor deposition (J. Phys. Chem. Lett. 2010, 1, 1247-1253; Chem. Sci. 2013, 4, 494-502). In recent work, we deployed principal component analysis to scanning transmission X-ray microscopy data acquired for graphene oxide and mapped out the chemical group distribution at the edges and interior domains of graphene oxide (J. Phys. Chem. Lett. 2013, 4, 3144-3151). Our ongoing research thrusts are focused on (a) mapping lithiation pathways in cathode materials for Li-ion batteries; (b) developing an orbital-specific description of mechanisms of metal—insulator transitions; and (c) electronic structure mapping of dopant-induced inhomogeneities in graphene.

    3. Solution-Phase Routes to Oxide and Oxyhalide Nanocrystals
    We attempt to use low-temperature solution-chemistry starting with metal—organic precursors to capture different polymorphs and morphologies of metal oxides and oxyhalides. We have focused primarily on mixed metal HfxZr1-xO2 and CexHf1-xO2 as well as REOX (RE: rare earth; X: halide) nanocrystals from the non-hydrolytic condensation of metal alkoxides and metal chlorides. By varying steric and electronic parameters on added ligands and metal alkoxide precursors as well as precursor addition rates we are able to achieve very precise control of the stoichiometry, phase, and size of the nanocrystals. Most notably, the kinetics of the reaction can be altered based on choice of the precursor to trap specific polymorphs at room temperature. In recent work, we've shown that the tetragonal to monoclinic phase transition in nanorods of hafnium dioxide induces ferroelastic domain formation, yielding a "bar-code"-like pattern of twin variants. This synthetic approach has also been extended to facilitate ligand exchange and condensation yielding ternary rare-earth oxyhalide nanocrystals in the matlockite phase. The potential applicability of solid solution REOCl nanostructures as phosphors is illustrated by demonstrating the upconversion of near-infrared illumination to green and red emission by Er3+:GdOCl nanocrystals. Our ongoing research is focused on synthesis, doping, and fundamental physical property measurements of thin nanosheets of layered REOX phases and on developing high-refractive-index and high-dielectric constant films of mixed metal oxides. Another area of research seeks to correlate the steric and electronic properties of ligands and precursors to the eventual morphologies and dimensions of the nanocrystals.

    Oxyhalide Nanocrystals

    4. Nanocomposites and coatings
    We are interested in developing polymer/nanoparticle hybrid coatings for corrosion protection of steels as well as metal matrix and polymer composites for "light and strong" applications. We are particularly interested in the use of nanoscale magnesium and graphene in conjunction with carbon nanotubes to fabricate composites that inhibit corrosion of low alloy steels at low coating thicknesses. Our modular design of coatings is based on an "active—passive" approach incorporating both barrier-type performance as well as electrochemically active components that disrupt the formation of corrosion cells on the metal surface. Tailoring the surface functionalization of the nanoparticle fillers allows for good dispersion within polymer matrices, which is critical for corrosion inhibition as well as for mechanical properties of the composites.

    Corrosion Coating

    All Publications

    130) Bethany Hudak, Sean W. Depner, Gregory R. Waetzig, Anjana Talapatra, Raymundo Arroyave, Sarbajit Banerjee,* and Beth S. Guiton,* Real-time Atomistic Observation of Structural Phase Transformations in Individual Hafnia Nanorods Nature Communications 2017, 8, 15316. Abstract

    129) Gregory A. Horrocks, Luis R. De Jesus, Justin L. Andrews, and Sarbajit Banerjee* X-ray Spectroscopy and Imaging as Multiscale Probes of Intercalation Phenomena in Cathode Materials JOM: The Journal of The Minerals, Metals & Materials Society (TMS) 2017, DOI: 10.1007/s11837-017-2398-3. Abstract

    128) Cody J Chalker, Hyosung An, Jose Alejandro Zavala, Abhishek Parija, Sarbajit Banerjee, Jodie L Lutkenhaus,* James D Batteas,* Fabrication and Electrochemical Performance of Structured Mesoscale Open Shell V2O5 Networks Langmuir 2017, DOI: 10.1021/acs.langmuir.6b04163. Abstract

    127) Justin L Andrews, Luis R De Jesus, Thomas M Tolhurst, Peter M Marley, Alexander Moewes, Sarbajit Banerjee,* Intercalation-induced Exfoliation and Thickness-modulated Electronic Structure of a Layered Ternary Vanadium Oxide Chemistry of Materials 2017, 29, 3285-3294. Abstract

    126) Yun-Hyuk Choi, Junsang Cho, Allen M Lunsford, Mohammed Al-Hashimi, Lei Fang, and Sarbajit Banerjee,* Mapping the Electrocatalytic Activity of MoS2 across its Amorphous to Crystalline Transition Journal of Materials Chemistry A 2017, 5, 5129 – 5141. Abstract

    125) Thomas E O'Loughlin, Sean Martens, Suchang Ren, Patrick McKay, and Sarbajit Banerjee,* Orthogonal Wettability of Hierarchically Textured Metal Meshes as a Means of Separating Water/Oil Emulsions Advanced Engineering Materials 2017, DOI: 10.1002/adem.201600808. Abstract

    124) Hasti Asayesh-Ardakani, Wentao Yao, Anmin Nie, Peter M. Marley, Erick Braham, Robert F. Klie, Sarbajit Banerjee, and Reza Shahbazian-Yassar Direct Evidence of M2 Phase during the Monoclinic-Tetragonal (Rutile) Phase Transition of W-Doped VO2 Nanowires Applied Physics Letters 2017, 110, 053107/1-4. Abstract

    123) Kate E. Pelcher, Christopher C. Milleville, Linda Wangoh, Junsang Cho, Aaron Sheng, Saurabh Chauhan, Matthew Y. Sfeir, Louis F. J. Piper, David F. Watson,* Sarbajit Banerjee,* Programming Interfacial Energetic Offsets and Charge Transfer in β-Pb0.33V2O5/Quantum-Dot Heterostructures: Tuning Valence-Band Edges to Overlap with Midgap States Journal of Physical Chemistry C 2016, 120, 28992–29001. Abstract

    122) Gregory A. Horrocks, Erick J. Braham, Yufeng Liang, Luis De Jesus, Joshua Jude, Jesus M. Velazquez, David Prendergast, Sarbajit Banerjee,* Vanadium K-edge X-ray Absorption Spectroscopy as a Probe of the Heterogeneous Lithiation of V2O5: First Principles Modeling and Principal Component Analysis Journal of Physical Chemistry C 2016, 120, 23922–23932. Abstract

    121) Junsang Cho, Yun-Hyuk Choi, Thomas E. O’Loughlin, Luis De Jesus, and Sarbajit Banerjee,* Ligand-Mediated Modulation of Layer Thicknesses of Perovskite Methylammonium Lead Bromide Nanoplatelets Chemistry of Materials 2016, 28, 6909-6916 Abstract

    120) Zhixiao Liu, Luis R. DeJesus, Sarbajit Banerjee,* Partha P. Mukherjee,* A Mechanistic Evaluation of LixOy Formation on δ-MnO2 in Non-Aqueous Li-air Batteries ACS Applied Materials and Interfaces 2016. Abstract

    120) Yun-Hyuk Choi, Jongbok Lee, Abhishek Parija, Junsang Cho, Stanislav Verkhoturov Mohammed Al-Hashimi, Lei Fang, and Sarbajit Banerjee,* An In Situ Sulfidation Approach for the Integration of MoS2 Nanosheets on Carbon Fiber Paper and the Modulation of its Electrocatalytic Activity by Interfacing with nC60 ACS Catalysis, 2016, 6, 6246–6254 Abstract

    119) Abhishek Parija, Yufeng Liang, Justin Andrews, Luis R. De Jesus, David G. Prendergast, and Sarbajit Banerjee,* Topochemically De-Intercalated Phases of V2O5 as Cathode Materials for Multivalent Intercalation Batteries: A First-Principles Evaluation Chemistry of Materials, 2016, 28, 5611–5620. Abstract

    118) Gregory Waetzig, Sean W. Depner, Hasti Asayesh-Ardekani, Nicholas D. Cultrara, Reza Shahbazian-Yassar, and Sarbajit Banerjee,* Stabilizing Metastable Tetragonal HfO2 using a Non- Hydrolytic Solution-Phase Route: Ligand Exchange as a Means of Controlling Particle Size Chemical Science 2016, 7, 4930-4939 Abstract

    117) Christopher C Milleville, Kate E Pelcher, Matthew Y Sfeir, Sarbajit Banerjee,* David F Watson,* Directional Charge Transfer Mediated by Mid-Gap States: A Transient Absorption Spectroscopy Study of CdSe Quantum Dot/β-Pb0.33V2O5 Heterostructures Journal of Physical Chemistry C 2016, 120, 5221- 5232. Abstract

    116) Luis R. De Jesus, Gregory A. Horrocks, Yufeng Liang, Abhishek Parija, Cherno Jaye, Linda Wangoh, Jian Wang, Daniel A. Fischer, Louis F.J. Piper, David Prendergast, Sarbajit Banerjee,* Mapping Polaronic States and Lithiation Gradients in Individual V2O5 Nanowires Nature Communications 2016, 7, 12022, DOI: 10.1038/ncomms12022. Abstract

    115) Thomas M. Tolhurst, Brett Leedahl, Justin L. Andrews, Peter M. Marley, Sarbajit Banerjee, and Alexander Moewes,* Contrasting 1D Tunnel-Structured and 2D Layered Polymorphs of V2O5: Relating Crystal Structure and Bonding to Band Gaps and Electronic Structure Phys. Chem. Chem. Phys. 2016, 18, 15798-15806. Abstract

    114) Gregory Waetzig, Gregory A. Horrocks, Joshua Jude, Lucia Zuin, and Sarbajit Banerjee,* X-ray Excited Photoluminescence near the Giant Resonance in Solid-Solution Gd1-xTbxOCl Nanocrystals and its Retention Upon Solvothermal Topotactic Transformation to Gd1-xTbxF3. Nanoscale 2016, 8, 979-986. Abstract

    113) Hasti Asayesh-Ardakani; Anmin Nie; Peter M. Marley; Sujay K. Singh; F. Mashayek; G. Sambandamurthy.; K.-B. Low; Robert F. Klie; Sarbajit Banerjee, Gregory M. Odegard, Reza Shahbazian- Yassar,* Atomic Origins of Monoclinic-Tetragonal (Rutile) Phase Transition in Doped VO2 Nanowires. Nano Letters 2015, 15, 7179–7188. Abstract

    112) Sujay Singh, Gregory A. Horrocks, Peter M. Marley, Zhenzhong Shi, Sarbajit Banerjee, and G. Sambandamurthy,* Proliferation of Metallic Domains Caused by Inhomogeneous Heating near the Electrically-Driven Transition in VO2 Nanobeams, Phys. Rev. B, 2015, 92, 155121. Abstract

    111) Theodore E. G. Alivio, Luis R. De Jesus, Robert V. Dennis, Ye Jia, Cherno Jaye, Daniel A. Fischer, Uttam Singisetti, and Sarbajit Banerjee,* Atomic Layer Deposition of Hafnium (IV) Oxide on Graphene Oxide: Probing Interfacial Chemistry and Nucleation by using X‐ray Absorption and Photoelectron Spectroscopies, ChemPhysChem, 2015, in press. Abstract

    110) William L. Friesen, Brian J. Schultz, Joel F. Destino, Theodore E. G. Alivio, Joseph R. Steet, Sarbajit Banerjee, and Troy D. Wood,* Two-Dimensional Graphene as a Matrix for MALDI Imaging Mass Spectrometry, J. Am. Soc. Mass Spectrometry, 2015, in press. Abstract

    109) Adam A. Stabile, Sujay K. Singh, Tai-Lung Wu, Luisa Whittaker-Brooks, Sarbajit Banerjee, and G. Sambandamurthy,* Separating Electric Field and Thermal Effects Across the Metal-Insulator Transition in Vanadium Oxide Nanobeams, Appl. Phys. Lett. 2015, in press. Abstract

    108) Katie E. Farley, Zhenzhong Shi, Sambandamurthy Ganapathy,* and Sarbajit Banerjee,* Charge Density Waves in Individual Nanoribbons of Orthorhombic-TaS3, Phys. Chem. Chem. Phys. 2015, 17, 18374-18379. Abstract

    107) Robert V. Dennis, Vikas Patil, Justin L. Andrews, Jeffrey P. Aldinger, Ganapati D. Yadav, and Sarbajit Banerjee,* Hybrid Nanostructured Coatings for Corrosion Protection of Base Metals: A Sustainability Perspective, Materials Research Express 2015, 2, 032001/1-23 (Invited Review Article). Abstract

    106) Peter M. Marley, Gregory A. Horrocks, Kate E. Pelcher, and Sarbajit Banerjee,* Transformers: The Changing Phases of Low-Dimensional Vanadium Oxide Bronzes, Chemical Communications 2015, 51, 5181-5198 (2015 Emerging Investigators Honoree). Abstract

    105) Kate E. Pelcher, Christopher C. Milleville, Linda Wangoh, Saurabh Chauhan, Matthew R. Crawley, Louis F. J. Piper, David F. Watson,* and Sarbajit Banerjee,* Integrating β-Pb0.33V2O5 Nanowires with CdSe Quantum Dots: Towards Nanoscale Heterostructures with Tunable Interfacial Energetic Offsets, Chemistry of Materials 2015, 27, 2468-2479. Abstract

    104) Kenneth R. Kort, P. Y. Hung, Gennadi Bersuker, Wei-Yip Loh, and Sarbajit Banerjee,* Determination of Free Electron Density in Sequentially Doped InxGa1-xAs by Raman Spectroscopy, Applied Spectroscopy, 2015, 69, 239-242. Abstract

    103) Peter M. Marley, Tesfaye A. Abtew, Katie E. Farley, Gregory A. Horrocks, Robert V. Dennis, Peihong Zhang, and Sarbajit Banerjee,* Emptying and Filling a Tunnel Bronze, Chemical Science 2015, 6, 1712-1718. Abstract

    102) Kenneth R. Kort and Sarbajit Banerjee,* Ligand-Mediated Control of Dislocation Dynamics and Resulting Particle Morphology of GdOCl Nanocrystals, Small 2015, 11, 329-334. Abstract

    101) Vikas Patil, Robert V. Dennis, Tapan K. Rout, Sarbajit Banerjee,* and Ganapati D. Yadav,* Graphene Oxide and Functionalized Multi Walled Carbon Nanotubes as Epoxy Curing Agents: A Novel Synthetic Approach to Nanocomposites Containing Active Nanostructured Fillers, RSC Advances 2014, 4, 49264-49272. Abstract

    100) Gregory A. Horrocks, Sujay K. Singh, Maliek F. Likely, G. Sambandamurthy, and Sarbajit Banerjee,* Scalable Hydrothermal Preparation of VO2 Nanowires in the M1 Phase, ACS Applied Materials and Interfaces, 2014, 6, 15726–15732. Abstract

    99) Peter M. Marley, Sujay Singh, Tesfaye A. Abtew, Cherno Jaye, Daniel A. Fischer, Peihong Zhang, G. Sambandamurthy, and Sarbajit Banerjee,* Electronic Phase Transitions of δ-AgxV2O5 Nanowires: The Interplay between Geometric and Electronic Structure, Journal of Physical Chemistry C 2014, 118, 21235–21243. Abstract

    98) Kenneth R. Kort and Sarbajit Banerjee,* Ligand-Mediated Control of Dislocation Dynamics and Resulting Particle Morphology of GdOCl Nanocrystals, Small 2014, DOI: 10.1002/smll.201401306. Abstract

    97) Kenneth R. Kort, P. Y. Hung, Gennadi Bersuker, Wei-Yip Loh, and Sarbajit Banerjee,* Sequential Silicon and Sulfur Doping of In0.53Ga0.47As and Determination of Free Electron Density by Raman Spectroscopy, Applied Spectroscopy, 2014, in press. Abstract

    96) Kate E. Pelcher, Matthew R. Crawley, and Sarbajit Banerjee,* Silica-Shell Encapsulation and Adhesion of VO2 Nanowires to Glass Substrates: Integrating Solution-Derived VO2 Nanowires within Thermally Responsive Coatings, Mater. Res. Express 2014, 1, 035014. Abstract

    95) John B. Hatch, Luisa Whittaker-Brooks, Tai-Lung Wu, Gen Long, Hao Zeng, G. Sambandamurthy, Sarbajit Banerjee, and Hong Luo, Intermediate Metallic Phase in VO2 Observed with Scanning Tunneling Spectroscopy, Phys. Chem. Chem. Phys. 2014. Abstract

    94) Robert V. Dennis, Lasantha T. Viyannalage,Jeffrey P. Aldinger, Tapan K. Rout, and Sarbajit Banerjee,*Nanostructured Magnesium Composite Coatings for Corrosion Protection of Low-Alloy Steels, Industrial and Engineering Chemistry Research, 2014. Abstract

    93) Lynda Wangoh, Peter M. Marley, Nicholas F. Quackenbush, Sarah Sallis, Daniel A. Fischer, Joseph C. Woicik, Sarbajit Banerjee, and Louis F. J. Piper,* Electron Lone Pair Distortion Facilitated Metal-Insulator Transition in β-Pb0.33V2O5 Nanowires, Appl. Phys. Lett. 2014, 104, 182108/1-4. Abstract

    92) Sean W. Depner, Nicholas D. Cultrara, Yueling Qin, Katie E. Farley, and Sarbajit Banerjee,* Organization of Ferroelastic Domains and Precursor Control of Size in 1D HfO2 Nanorods, ACS Nano 2014, 8, 4678-4688. Abstract

    91) Brian J. Schultz, Robert V. Dennis, Vincent Lee, and Sarbajit Banerjee,* An Electronic Structure Perspective of Graphene Interfaces, Nanoscale 2014, 6, 3444-3466 (invited Feature Article). Abstract

    90) Kenneth R. Kort, P. Y. Hung, Patrick Lysaght, Wei-Yip Loh, Gennadi Bersuker, and Sarbajit Banerjee,* Raman Spectroscopy Studies of Dopant Activation and Free Electron Density of In0.53Ga0.47As with Sulfur Monolayer Doping, Phys. Chem. Chem. Phys. 2014, 16, 6539-6543. Abstract

    89) Thomas E. O’Loughlin, Sean W. Depner, Brian J. Schultz, and Sarbajit Banerjee,* Microwave-Induced Nucleation of Conducting Graphitic Domains on Silicon Carbide Surfaces, J. Vac. Sci.Technol. B 2014, 32, 011215-1-011215-8. Abstract

    88) Brian J. Schultz, Robert V. Dennis, Jeffrey A. Aldinger, Xi Wang, Cherno Jaye, Daniel A. Fischer, Alexander N. Cartwright, and Sarbajit Banerjee,* X-ray Absorption Spectroscopy Studies of Electronic Structure Recovery and Nitrogen Local Structure upon Thermal Reduction of Graphene Oxide in an Ammonia Environment, RSC Advances 2014, 4, 634-644. Abstract

    87) Tirandai Hemraj-Benny,* Julie A. Pigza, Susan Budhoo, Loren Condon, Sean W. Depner, Robert V. Dennis, and Sarbajit Banerjee, Synthesis of Novel Single-Walled Carbon Nanotube-Magnesium Nanoparticle Composites by a Solution Reduction Method, Mater. Lett. 2014, 117, 305-308. Abstract

    86) Gregory A. Horrocks, Maliek Likely, Jesus M. Velazquez, and Sarbajit Banerjee,* Finite Size Effects on the Structural Progression Induced by Lithiation of V2O5: A Combined Diffraction and Raman Spectroscopy Study, Journal of Materials Chemistry A, 2013, 1, 15265–15277. Abstract

    85) Jesus M. Velazquez, Sivapalan Baskaran, Anil V. Gaikwad, Tam-Triet Ngo-Duc, Xiangtong He, Michael Oye, M. Meyyappan, Tapan K. Rout, John Y. Fu, and Sarbajit Banerjee,* Measurement of the Effective Piezoelectric Response of Substrate-Integrated ZnO Nanowire arrays on Galvanized Steel, ACS Applied Materials & Interfaces 2013, 5, 10650-10657. Abstract

    84) Robert V. Dennis, Brian J. Schultz, Cherno Jaye, Xi Wang, Daniel A. Fischer, Alexander N. Cartwright, and Sarbajit Banerjee,* Near-edge X-ray Absorption Fine Structure Spectroscopy Study of Nitrogen Incorporation in Chemically Reduced Graphene Oxide. J. Vac. Sci. Technol. B 2013, 31, 041204-1- 041204-9. Abstract

    83) Luis R. DeJesus, Robert V. Dennis, Sean W. Depner, Cherno Jaye, Daniel A. Fischer, and Sarbajit Banerjee,* Inside and Outside: X-ray Absorption Spectroscopy Mapping of Chemical Domains in Graphene Oxide. J. Phys. Chem. Lett. 2013, 4, 3144−3151. Abstract

    82) Robert V. Dennis, Lasantha T. Viyannalage, Anil V. Gaikwad, Tapan K. Rout, and Sarbajit Banerjee,* Graphene Nanocomposite Coatings for Protecting Low-Alloy Steels from Corrosion. Am. Ceram. Soc. Bulletin 2013. 92, 18-24 (featured as the cover article). Abstract

    81) David T. R. Stewart, Katia Noguera-Oviedo, Vincent Lee, Sarbajit Banerjee, David F. Watson, Diana S. Aga,* Quantum Dots Exhibit Less Bioaccumulation than Free Cadmium and Selenium in the Earthworm Eisenia andrei. Environ. Toxicol. Chem. 2013. 32, 1288-1294. Abstract

    80) Nathaniel F. Adegboyega, Virender K. Sharma,* Karolina Siskova, Radek Zboril, Mary Sohn, Brian J. Schultz, Sarbajit Banerjee, Interactions of Aqueous Ag+ with Fulvic Acids: Mechanisms of Silver Nanoparticle Formation and Investigation of Stability, Environ. Sci. Technol. 2013, 47, 757-764. Abstract

    79) Kenneth R. Kort and Sarbajit Banerjee,* Oriented Electrophoretic Deposition of GdOCl Nanoplatelets, Journal of Physical Chemistry B 2013, 117, 1585-1591 (invited article in special issue on Electrophoretic Deposition). Abstract

    78) Tesfaye Abtew, Bi-Ching Shih, Sarbajit Banerjee, Peihong Zhang,* Graphene-Ferromagnet Interfaces: Hybridization, Magnetization and Charge Transfer, Nanoscale 2013, 5, 1902-1909. Abstract

    77) Brian J. Schultz, Cherno Jaye, Patrick D. Lysaght, Daniel A. Fischer, David Prendergast, Sarbajit Banerjee,* Chemical Bonding and Electronic Structure at Metal/Graphene Interfaces. Chem. Sci. 2013, 4, 494 - 502. Abstract

    76) Nelson Akaighe, Sean W. Depner, Sarbajit Banerjee, Mary Sohn, Transport and Deposition of Suwannee River Humic Acid/Natural Organic Matter Formed Silver Nanoparticles on Silica Matrices: The Influence of Solution pH and Ionic Strength. Chemosphere, 2013, 92, 406-412. Abstract

    75) Vincent Lee, Robert V. Dennis, Cherno Jaye, Brian J. Schultz, Daniel A. Fischer, and Sarbajit Banerjee,* Soft X-Ray Absorption Spectroscopy Studies of the Electronic Structure Recovery of Graphene Oxide upon Chemical Defunctionalization. Journal of Physical Chemistry C 2012, 116, 20591-20599. Abstract

    74) Vincent Lee, Robert V. Dennis, Cherno Jaye, Xi Wang, Daniel A. Fischer, Alexander N. Cartwright, Sarbajit Banerjee,* In Situ Near-Edge X-ray Absorption Fine Structure Spectroscopy Investigation of the Thermal Defunctionalization of Graphene Oxide. J. Vac. Sci. Technol. B 2012, 30, 061206/1-6. Abstract

    73) Tai-Lung Wu, Adam A. Stabile, Christopher J. Patridge, Sarbajit Banerjee, and G. Sambandamurthy,* Electrically Driven Metal-Insulator Switching in δ-KxV2O5 Nanowires, Appl. Phys. Lett. 2012,101, 163502/1-163502/4. Abstract

    72) Nelson Akaighe, Sean W. Depner, Sarbajit Banerjee, Virender K. Sharma, Mary Sohn, The Effects of Monovalent and Divalent Cations on the Stability of Silver Nanoparticles Formed from Direct Reduction of Silver Ions by Suwannee River Humic Acid/Natural Organic Matter, Sci. Total Environ. 2012, 441, 277—289. Abstract

    71) Peter Marley, Adam A. Stabile, Chun Pui Kwan, Sujay Singh, G. Sambandamurthy,* and Sarbajit Banerjee,* Charge Disproportionation, Charge Ordering, and Voltage-Induced Metal-Insulator Transitions Evidenced in β-PbxV2O5 Nanowires, Advanced Functional Materials 2013, 23, 153-160. Abstract

    70) Anil V. Gaikwad, Tapan K. Rout, Dirk Van der Plas, Robert V. Dennis, and Sarbajit Banerjee,* Sergio Pacheco Benito, and Leon Lefferts, Homogeneous Carbon Nanotube/Carbon Nanofiber Growth from Industrial Feedstock on Commodity Low Carbon Steel and Nickel- Plated Steel, Carbon, 2012, 50, 4722-4731. Abstract

    69) Brian J. Schultz, Vincent Lee, Jimmy Price, Cherno Jaye, Patrick S. Lysaght, Daniel A. Fischer, David Prendergast, Sarbajit Banerjee,* Near-Edge X-ray Absorption Spectroscopy Studies of Charge Redistribution at Graphene-Dielectric Interfaces, J. Vac. Sci. Technol. B 2012, 30, 041205/1-041205/6. Abstract

    68) Peter Marley and Sarbajit Banerjee,* Reversible Interconversion of a Divalent Vanadium Bronze between δ and β Quasi-1D Structures, Inorg. Chem. 2012, 51, 5264-5269. Abstract

    67) Lasantha T. Viyannalage, Vincent Lee, Robert V. Dennis, and Sarbajit Banerjee,* From Grignard’s Reagents to Well-Defined Mg Nanostructures: Distinctive Electrochemical and Solution Reduction Routes, Chem. Commun. 2012, 48, 5169-5171. Abstract

    66) Christopher J. Patridge, Luisa Whittaker, Bruce Ravel, and Sarbajit Banerjee,* Elucidating the Influence of Local Structure Perturbations on the Metal—Insulator Transitions of V1-xMoxO2 Nanowires: Mechanistic Insights from an X-ray Absorption Spectroscopy Study, J. Phys. Chem. C 2012, 116, 3728–3736. Abstract

    65) Jesus M. Velazquez, Anil V. Gaikwad, Tapan K. Rout, Robert E. Baier, Edward S. Furlani, and Sarbajit Banerjee,* Nanotexturation-Induced Extreme Wettability of an Elemental Tellurium Coating, J. Mater. Chem. 2012, 22, 3335-3339 Abstract

    Principal Investigator

    Dr. Sarbajit Banerjee

    Principal Investigator
    link to CV


  • Rosenhain Medal and Prize, Institute of Materials, Minerals, and Mining UK (2015)
  • Royal Society of Chemistry Chemical Communications, Emerging Investigator (2015)
  • Journal of Physical Chemistry C Lectureship Award (2013)
  • Scialog Fellow, Research Corporation for Science Advancement (2013)
  • TMS Young Leader Professional Development Award (2013)
  • MIT Technology Review TR35 Award (Top 35 Young Innovators under the age of 35) (2012)
  • State University of New York Visionary Innovator Award (2010)
  • Cottrell Scholar Award, Research Corporation for Science Advancement (2010)
  • ExxonMobil Solid State Chemistry Faculty Fellowship, American Chemical Society (2010)
  • National Science Foundation CAREER Award (2009)
  • Areas of Interest

  • Solid-State and Materials Chemistry
  • Nanoscale Materials
  • Electronic Structure, Chemical Imaging, and X-ray Spectroscopy
  • Thin Films and Coatings
  • Light Metals and Nanocomposites
  • Post Doctoral Fellows

    Dr. Yun Hyuk Choi
    Education: Seoul National University, 2014
    Research: 2D transitin metal disulfides (TMD)
    Langmuir 31 (29), 8101–8110.
    About Me:

    Graduate Students

    Gregory Horrocks
    About Me:

    Kate Pelcher CV
    Education: Bob Jones University, 2011
    About Me: I enjoy yoga, hiking, quilting, and spending time with my dogs!
    Research: My research focuses on utilizing vanadium oxides for energy conservation and energy conversion. I focus on integrating hydrothermally grown vanadium dioxide nanowires into coatings for use in thermochromic films or windows. In addition, I work with a tunable platform for photocatalytic water splitting, which consists of a vanadium oxide bronze paired with quantum dots.
    1. Milleville, C.C.; Pelcher, K.E.; Sfeir, M. Y.; Watson, D. F.; Banerjee S. “Directional Charge Transfer Mediated by Mid-Gap States: A Transient Absorption Study of CdSe Quantum Dot/β-Pb0.33V2O5 Heterostructures” J. Phys. Chem. C 2016 Article ASAP.

    2. Pelcher, K. E.; Milleville, C. C.; Wangoh, L.; Chauhan, S.; Crawley, M. R.; Marley, P. M.; Piper, L. F. J.; Watson, D. F.; Banerjee, S. “Integrating β-Pb0.33V2O5 Nanowires with CdSe Quantum Dots: Toward Nanoscale Heterostructures with Tunable Interfacial Energetic Offsets for Charge Transfer.” Chem. Mater. 2015, 27, 2468–2479.
    3. Pelcher, K. E.; Crawley, M. C.; Banerjee, S. “Silica-Shell Encapsulation of VO2 Nanowires: Progress Towards Improving Thermal Stability and Adhesion of VO2 Nanowires to Glass Surfaces” Mater. Res. Express 2014, 1, 035014.

    Tom O'Loughlin CV
    Education: SUNY Geneseo, class of 2010
    About Me: My favorite past times include camping, hiking, and riding my motorcycle.
    Research: My research focuses on substrate integrated nanostructures. One major thrust of my research includes the use of nanomaterials for inorganic membranes for the separation of emulsions based on differential wettability.
    1. Thomas E. O'Loughlin, Sean W. Depner, Brian J. Schultz, and Sarbajit Banerjee, Microwave-induced nucleation of conducting graphitic domains on silicon carbide surfaces, J. Vac. Sci. Technol. B. 2014, 32, 011215.

    Luis De Jesus CV
    Education: Universidad de Puerto Rico en Cayey (2008)
    About Me: I enjoy playing sports (any) and exercising. I spend my free time either reading a book or watching a movie.
    Research: I use scanning transmission X-ray microscopy (STXM) in tandem with density functional theory (DFT) calculations to compare and contrast the electronic structure with the geometrical structure of materials with applications in technology, such as photocatalysis and batteries.
    1. De Jesus, L. R.; Dennis, R. V.; Depner, S. W.; Jaye, C.; Fischer, D. A.; Banerjee, S. Inside and Outside: X-Ray Absorption Spectroscopy Mapping of Chemical Domains in Graphene Oxide. J. Phys. Chem. Lett. 2013, 4, 3144–3151.

    Theodore Alivio CV
    Education: Bachelor of Science in Materials Science and Engineering, Minor in Japanese Studies (2010): Ateneo de Manila University, Bachelor of Science in Chemistry (2009): Ateneo de Manila University
    About Me: I like going on long road trips and reading detective novels. I also enjoy playing badminton. I also like going to the gym once a year. Lastly, I'm a cat person!
    Research: My research is mainly focused on lowering the transition temperature of vanadium(IV) oxide by ex situ doping. My other projects involve studying the interface of metals, semiconductors, and dielectrics onto 2D materials such as graphene.
    Publications: 1. Alivio, T. E. G.; De Jesus, L. R.; Dennis, R. V.; Jia, Y.; Jaye, C.; Fischer, D. A.; Singisetti, U.; Banerjee, S. Atomic Layer Deposition of Hafnium(IV) Oxide on Graphene Oxide: Probing Interfacial Chemistry and Nucleation by Using X-ray Absorption and X-ray Photoelectron Spectroscopies. ChemPhysChem. 2015, 16, 2842-2848.

    2. Friesen, W. L.; Schultz, B. J.; Destino, J. F.; Alivio, T. E. G.; Street, J. R.; Banerjee, S.; Wood, T. Two-Dimensional Graphene as a Matrix for MALDI Imaging Mass Spectrometry. J. Am. Soc. Mass Spectr. 2015, 26, 1963-1966.

    Gregory Waetzig
    Education: B.S. Chemistry ACS Approved University of Wyoming, 2013
    About Me: My hobbies include anything and everything with being outside and enjoying the great outdoors. Specifically golf, basketball, and softball. I also like to go camping, hiking and fishing with some occasional mountaineering.
    Research: My primary research project focuses on developing optical and X-ray phosphors through incorporation of dopant atoms within a lanthanide oxychloride matrix. We then examine the fundamental sensitization mechanisms, activation channels, and recombination pathways that occur upon modulation of the electronic structure.
    1. "G. R. Waetzig, G. A. Horrocks, J. W. Jude, L. Zuin and S. Banerjee, Nanoscale, 2016, 8, 979–986 Y. N. Regmi, G. R. Waetzig, K. D. Du, S. M. Schmuecker, J. M. Thode and B. M. Leonard, J. Mater. Chem. A, 2015, 3, 10085–10091."

    Abhishek Parija
    Education: 5yr. Int. M.Sc. Indian Institute of Technology, Bombay.
    About Me:

    Justin Andrews
    Education: Gordon College, 2014
    About Me: I enjoy playing basketball for exercise. I also love to read and my favorite authors are Kurt Vonnegut, Corey Doctorow, G. K. Chesterton, and C.S. Lewis. I love to tinker with 3D printing and making ‘penny-art’ as decoration. I LOVE spicy food and make it a point to try spicy-food/wing challenges whenever I find a new one nearby, making it a goal to end up on the challenge-winner wall at each location.
    Research: My research is centered on the synthesis and characterization of nanostructured vanadium oxide bronzes (MxV2O5). These materials exhibit a variety of interesting and useful electronic and magnetic phenomena, including charge density waves, charge ordering/delocalization, metal-insulator transitions and spin-gaps. Additionally, due to the facile, easily accessible redox couples of V2O5 (V5+/V4+, V4+/V3+) and very open 2D/3D frameworks of the bronzes, these materials have

    potential as frameworks in applications such as battery cathode materials. In my research, I focus on elucidating the structure-function relationship at the root of these phenomena. In doing so, I utilize traditional solid-state ceramics and hydrothermal syntheses to produce vanadium oxide bronze nanomaterials as well as synchrotron diffraction and spectroscopy to characterize and correlate geometric and electronic structures.

    Nathan Fleer
    Education: University of Arkansas Fort Smith, 2014
    About Me:
    Research: Polymer dispersion and surface chemistry of VO2 nanowires. Corrosion inhibiting coatings.

    Junsang Cho
    Education: Hanyang University, 2008 (B.S.) and Seoul National Univeristy, 2012 (M.S.)
    About Me: My hobbies are walking around the park, swimming, and running.
    Research: My research is mainly concerned with synthesis of nanocrystals and their applications in photoluminescence and photocatalytic activity. I'm interested in the synthesis of perovskite nanoplatet controlled by steric effect of surface ligands and integrations quantum dots to PbxV2O5 nanowires.

    Erick Braham
    Education: Niagara University 2015 chem bs
    About Me: I like science and rock climbing and my family.
    Research: Investigating synthesis and doping of VO2 and using big data analysis in targeted materials design.
    1. Braham, E. J., Goacher, R. E. (2015). Identifying and minimizing buffer interferences in ToF‐SIMS analyses of lignocellulose. Surface and Interface Analysis, 47(1), 120-126.

    Rachel Davidson
    About Me:

    Yuting Luo CV
    Education: Bachelor of Science, Chemistry, Nankai University, Tianjin China (09/2010-06/2014)
    About Me:
    Research: The exploration of mechanisms for lithium ion battery. Rational design for inorganic nano-structured materials. The improvement of electrochemical performances for lithium ion battery.
    1. Yuting Luo,† Xianlong Zhou,† Yiren Zhong, Mei Yang, Jinping Wei, and Zhen Zhou*, Preparation of core-shell porous magnetite@carbon nanospheres through chemical vapor deposition as anode materials for lithium-ion batteries, Electrochimica Acta 2014, 154, 136- 141.

    2. Yiren Zhong, Mei Yang, Xianlong Zhou, Yuting Luo, Jinping Wei, and Zhen Zhou*, Orderly-Packed Anodes for High-Power Lithium-Ion Batteries with Super Long Cycle Life: Rational Design of MnCO3/Large-Area Graphene Composites, Advanced Materials 2015, 27(5), 806-812.
    3. Lin Mei, Zhentan Lu, Wei Zhang, Zhongming Wu, Xinge Zhang*, Yanan Wang, Yuting Luo, Chaoxing Li*, Yanxia Jia, Bioconjugated nanoparticles for attachment and penetration into pathogenic bacteria, Biomaterials 2013, 34, 10328-10337.

    Former Students

    Post Doctoral Fellows

    Dr. Lasantha T. Viyannalage (11/2010-5/2013)
    Senior Scientist, Greatbatch Medical

    Graduate Students

    Dr. Luisa Whittaker Brooks (Ph.D. 2011)
    Dissertation Title: "Synthesis, Characterization, Phase Transitions and Electronic Structure of VO2 Nanostructures"
    Assistant Professor, Department of Chemistry, University of Utah

    Dr. Christopher J. Patridge (Ph.D. 2011)
    Dissertation Title: "Chemically and Temperature-Induced Phase Transformations of Metal Vanadates"
    Assistant Professor, Department of Chemistry, D’Youville College

    Dr. Jesus M. Velazquez (Ph.D. 2012)
    Dissertation Title: "Vertically Aligned Nanostructured Arrays of Inorganic Materials: Synthesis, Distinctive Physical Phenomena, and Device Integration"
    Postdoctoral Researcher, Caltech

    Dr. Vincent Lee (Ph.D. 2012)
    Dissertation Title: "The Electronic Structure of Graphene and Graphene Oxide Interfaces"
    Postdoctoral Researcher, McMaster University

    Dr. Brian J. Schultz (Ph.D. 2013)
    Dissertation Title: "Electronic Structure Imperfections and Chemical Bonding at Graphene Interfaces"
    Principal and Founder, DIMIEN LLC.

    Dr. Sean W. Depner (Ph.D. 2014)
    Dissertation Title: "Synthetic Control of Crystal Structure and the Resulting Chemical and Physical Properties of Early Transition Metal Oxides and Carbides"
    Scientist, DIMIEN LLC.

    Dr. Kenneth R. Kort (Ph.D. 2014)
    Dissertation Title: "Synthesis, Characterization, and Spectroscopic Studies of Two-Dimensional Rare-Earth Oxychloride and InGaAs Thin Films"
    National Academies Christine Mirzayan Science and Technology Policy Graduate Fellow

    Dr. Peter Marley (Ph.D. 2014)
    Dissertation Title: ""

    Undergraduate Students

    Mr. Kenneth R. Kort (2007-2009), Ph.D. student in chemistry at the University at Buffalo

    Ms. Kristen M. Baroudi (2008-2010), Ph.D. student in chemistry at Princeton University

    Mr. Robert V. Dennis (2009-2010), Ph.D. student in chemistry at the University at Buffalo

    Mr. Tenzin Wangjor (2009-2010), nursing student at D’Youville College

    Ms. Nidya Dewi (2009-2010), nursing student at D’Youville College

    Mr. Gregory S. Pilgrim (REU 2009), Ph.D. student in chemistry at the University of Rochester

    Mr. Nicholas D. Cultrara (2010-2012), Ph.D. student in chemistry at The Ohio State University

    Mr. John R. Spaulding (2010-2012), Ph.D. student in materials science at Michigan Technological University

    Ms. Susan Budhoo (REU 2011), completing undergraduate degree at Drexel University

    Ms. Cristina Cruz (REU 2012), completing undergraduate degree at the University of Puerto Rico Cayey

    Mr. Steven M. Henderson (2011-2013), Ph.D. student in molecular biology at the University of Rochester

    Ms. Loren Condon (REU 2013), completing associate’s degree at Queensborough Community College

    Contact Us

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    Banerjee Research Group
    Department of Chemistry
    Texas A&M University
    PO Box 30012
    College Station, Texas 77842-3012

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    Banerjee Research Group
    Department of Chemistry
    Texas A&M University
    Ross St@ Spence St
    College Station, Texas 77843-3255

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    Banerjee Research Group
    Department of Chemistry
    Texas A&M University
    3255 TAMU
    College Station, Texas 77843-3255