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Search Publications by

J Greg Gillen (Fed)

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Displaying 26 - 50 of 109

High-speed thermo-microscope for imaging thermal desorption phenomena

July 25, 2012
Matthew E. Staymates, John G. Gillen
In this work, we describe a new imaging system, called a thermo-microscope, that can be used to visualize atmospheric pressure thermal desorption phenomena at high heating rates and frame rates. The system consists of a zoom lens coupled to a high-speed

Band-Like Transport in Strongly-Coupled And Doped Quantum Dot Solids: A Route To High-Performance Thin-Film Electronics

April 17, 2012
Ji-Hyuk Choi, Aaron T. Fafarman, Soong J. Oh, Dong-Kyun Ko, David K. Kim, Benjamin T. Diroll, Shinichiro Muramoto, J Greg Gillen, Christopher Murray, Cherie R. Kagan
Artificial solids constructed from colloidal quantum dot (QD) building blocks promise materials with tunable electronic properties. Yet high carrier mobilities and conductivities have been limited by weak coupling and low carrier concentrations. We report

The Development of an Aerodynamic Shoe Sampling System

November 15, 2011
Matthew E. Staymates, Jessica M. Grandner, John G. Gillen, Stefan Lukow
In collaboration with the Transportation Security Laboratory, the National Institute of Standards and Technology has been developing a prototype shoe sampling system that relies on aerodynamic sampling for liberating, transporting, and collecting explosive

Application of Inkjet Printing Technology to Produce Test Materials of 1,3,5-Trinitro-1,3,5 Triazcyclohexane for Trace Explosive Analysis

October 15, 2010
Eric S. Windsor, Marcela N. Najarro, Anna N. Bloom, Bruce A. Benner Jr, Robert A. Fletcher, John G. Gillen, Richard Lareau, Inho Cho, Mike Boldmand
The feasibility of using piezoelectric drop-on-demand inkjet printing to prepare test materials for trace explosive analysis is demonstrated. Both pure high explosives and plastic-bonded putty explosives were formulated into inkjet printable solutions and

Production and Characterization of Polymer Microspheres Containing Trace Explosives Using Precision Particle Fabrication Technology

August 2, 2010
Matthew E. Staymates, Robert A. Fletcher, Jessica L. Staymates, John G. Gillen, Cory Berkland
Well characterized test materials are essential for validating the performance of current trace explosive detection systems. These test materials must replicate trace explosive contamination in the form of small particles with characteristic diameters in

Flow Visualization Techniques for the Evaluation of Non-Contact Trace Contraband Detectors

August 1, 2010
Matthew E. Staymates, Wayne Smith, John G. Gillen, Richard T. Lareau, Robert A. Fletcher
Efforts are underway in the Surface and Microanalysis Science Division at the National Institute of Standards and Technology to study trace aerodynamic sampling of explosive particles using walk-through portal-based detection systems. Explosive trace

Metrology in Support of Trace Explosive Detection Equipment for Airport Security Applications.

October 16, 2008
George A. Klouda, J Greg Gillen, Robert A. Fletcher, E S. Etz, Jennifer R. Verkouteren, R. Michael Verkouteren, E Ferguson
We are working in collaboration with the Transportation Security Agency's Trace Explosive Detection Group to build a chemical metrology program to help support the widespread operational deployment and effective utilization of trace explosives detection

Raman Microspectroscopy of Some High Explosives, Revisited

October 16, 2008
E S. Etz, S V. Roberson, J Greg Gillen
Current NIST research is discussed on the characterization by micro-Raman spectroscopy of several high explosives (HES). The RamanSpectra are evaluated relative to the thermal decomposition of the HES to explain the reactions that produce secondary ion

Trace Explosive Detection Standards Using Drop-on-Demand Inkjet Printing Technology

October 16, 2008
Eric S. Windsor, Bruce A. Benner Jr., Robert A. Fletcher, J Greg Gillen, R Lareau, Inho Cho, Mike Boldmand
A piezoelectric drop-on-demand inkjet printer system has been used to prepare prototype trace explosive calibration materials to aid in the performance evaluation of ion mobility spectrometry instruments that are now widely deployed in support of homeland

Method to Determine Collection Efficiency of Particles by Swipe Sampling

September 1, 2008
Jennifer R. Verkouteren, Jessica L. Staymates, Robert A. Fletcher, Wayne Smith, George A. Klouda, John G. Gillen
A methodology was developed to evaluate particle collection efficiencies from swipe sampling of trace residues. Swipe sampling is used for many applications where trace residues must be collected, including the evaluation of radioactive particle