Schweikert Research Group

Selected Publications

Hypervelocity Cluster Ion Impacts on Free-standing Graphene: Experiment, Theory and Applications, S.V. Verkhoturov, M. Gołuński, D.S. Verkhoturov, B. Czerwinski, M.J. Eller, S. Geng, Z. Postawa, E.A. Schweikert, J. Chem. Phys., 150, 160901 (2019). doi:10.1063/1.5080606

Label Free Particle-by-Particle Quantification of DNA-Loading on Sorted Gold Nanostars, M.J. Eller, K. Chandra, E.E. Coughlin, T.W. Odom, E.A. Schweikert, Analyt. Chem., 91, 5566-5572 (2019). doi:10.1021/acs.analchem.8b03715

"Trampoline" Ejection of Organic Molecules from Graphene and Graphite vis keV Cluster Ion Impacts, S.V. Verkhoturov, M. Gołuński, D.S. Verkhoturov, B. Czerwinski, M.J. Eller, S. Geng, Z. Postawa, E.A. Schweikert, J. Chem. Phys., 148, 144309 (2018). doi:10.1063/1.5021352

Molecular Co-localization Using Massive Gold Cluster Secondary Ion Mass Spectrometry, M.J. Eller, A. Vinjaumuri, B.E. Tomlin, E.A. Schweikert, Analyt. Chem., 90, 12693-12697 (2018). doi:10.1021/acs.analchem.8b02950

Ejection-ionization of Molecules from Free-Standing Graphene, S.V. Verkhoturov, B. Czerwinski, D.S. Verkhoturov, S. Geng, A. Delcorte, E.A. Schweikert,J. Chem. Phys., 146, 084308 (2017). doi:10.1063/1.4976832

Members

Professor - Department of Chemistry
Director, Center for Chemical Characterization and Analysis
(979) 845-2341
e-schweikert@tamu.edu

Emile Schweikert is concerned with the development of novel instrumentation, techniques and data acquisition/analysis schemes for the characterization of solid surfaces. The technique of choice is secondary ion mass spectrometry with two key innovations: (a) surface bombardment is with keV polyatomic and cluster projectiles (e.g., (CsI)Cs+, C60+, Au4004+) to maximize the emission of secondary ions; the experiments are run in the event-by-event bombardment-detection mode (each projectile impact and its corresponding ejecta are observed individually), thus allowing to detect secondary icons from molecules colocated within the nanometric volume perturbed by a single projectile impact. The goal of Schweikert's research group is to develop surface analysis methodology to the level where zeptomole (10-21 mole) quantities of molecules can be localized and identified. The enhanced chemical vision is critical for localizing bioactive substances, understanding the formation of surface structures and the mechanism of catalytic processes.

 

Verkhoturov, Stanislav (979) 845-2344
verkhoturov@chem.tamu.edu

Research Interests:
Surface analysis via mass spectrometry (coincidence method) of nanoobjects deposited on surface (cluster, nanoparticles, deposited organic molecules and cells).

Development of new method for sub-nano-scale analysis of surfaces via radioactive K-capture decay. Fabrication of self-assembled mono/bilayer of organic molecules with embedded radioactive atoms.

Department of Chemistry, Texas A&M University
College Station, TX 77843
(Ph) 979-845-2341 | (Fx) 979-845-1655
e-schweikert@tamu.edu