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Author: Timothy Brewer

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1. Desorption Electro-Flow Focusing Ionization of Explosives and Narcotics for Ambient Pressure Mass
Published: 8/6/2013
Authors: Thomas P Forbes, Timothy M Brewer, John G Gillen
Abstract: Desorption electro-flow focusing ionization (DEFFI), a desorption-based ambient ion source, was developed and evaluated as a possible source for field deployable ambient pressure mass spectrometry (APMS). DEFFI, based on an electro-flow focusing syst ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913164

2. Primary and Secondary Droplet and Charge Transmission Characteristics of Desorption Electro-Flow Focusing Ionization
Published: 5/28/2013
Authors: Thomas P Forbes, Timothy M Brewer, John G Gillen
Abstract: We present the investigation of droplet charging and charge transmission characteristics of an electro-flow focusing nozzle for desorption-based ambient ionization mass spectrometry. The electro-flow focusing geometry utilizes a concentrically flowin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914743

3. Ambient Low Temperature Plasma Etching of Polymer Films for Virtually Damage-free SIMS Molecular Depth Profiling
Published: 11/8/2012
Authors: Shinichiro Muramoto, Timothy M Brewer, Matthew E Staymates, John G Gillen
Abstract: The feasibility of a low temperature plasma (LTP) probe as a way to prepare polymer bevel cross-sections for secondary ion mass spectrometry (SIMS) applications was investigated. Poly(lactic acid) and poly(methyl methacrylate) films were etched using ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911996

4. Pilot Estuarine Mesocosm Study on the Environmental Fate of Silver Nanomaterials Leached from Consumer Products
Published: 1/10/2012
Authors: Danielle Cleveland, Stephen E Long, Paul L. Pennington, Emily Cooper, Michael H. Fulton, Geoffrey I. Scott, Elijah J Petersen, Timothy M Brewer, Jeffrey M. Davis, Laura J Wood
Abstract: Although nanosilver consumer products (CPs) now enjoy widespread availability, little work has been done to determine the environmental fate and leaching of silver nanoparticles (AgNPs) from these products. This type of work is crucial, since the lif ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906343



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