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Search Publications by

J Greg Gillen (Fed)

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Displaying 26 - 50 of 103

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

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

NIST Program to Support Testing and Evaluation of Trace Explosive Detection

October 1, 2007
R M. Verkouteren, John G. Gillen, Jennifer R. Verkouteren, Robert A. Fletcher, Eric S. Windsor, Wayne Smith
Trace detection is a primary strategy for thwarting terrorism activities in the US and abroad. The development of effective reference materials and methods for this purpose relies on fundamental knowledge regarding the size, mass, morphologies, and

Inkjet Metrology and Standards for Ion Mobility Spectrometry

September 1, 2007
R M. Verkouteren, J Brazin, Eric S. Windsor, Robert A. Fletcher, R Maditz, Wayne Smith, John G. Gillen
Piezoelectric inkjet nozzles offer precise control for dispensing small quantities of materials. NIST is developing inkjet metrology to provide reference materials, calibration services, and other standards for the IMS detection of trace contraband

Temperature-Controlled Depth Profiling in Poly (methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS) II. An Investigation of Sputter-Induced Topography, Chemical Damage and Depolymerization Effects

February 1, 2007
Christine M. Mahoney, Albert J. Fahey, John G. Gillen, Chang Xu, James Batteas
Secondary Ion Mass Spectrometry (SIMS) employing an SF polyatomic primary ion source was used to depth profile Poly(methyl methacrylate) (PMMA) at a series of temperatures from -75 C to 125 C where the primary glass transition for PMMA occurs at 105 C. The

Temperature-Controlled Depth Profiling in Poly(methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS): I. Investigation of Depth Profile Characteristics

February 1, 2007
Christine M. Mahoney, Albert J. Fahey, John G. Gillen
Secondary Ion Mass Spectrometry (SIMS) employing an SF5+ polyatomic primary ion source was used to depth profile Poly(methyl methacrylate) (PMMA) at a series of temperatures from -75 oC to 125 oC, where the primary glass transition for PMMA occurs at 105

Quantitative Surface Analysis of Fe-Ni Alloy Films by XPS, AES and SIMS

January 1, 2007
K J. Kim, D Moon, C J. Park, David S. Simons, J Greg Gillen, H Jin, H Kang
Quantitative surface analysis of Fe-Ni alloy thin films has been proposed as a new subject for a pilot study by the surface analysis working group of the Consultative Committee for Amount of Substance (CCQM). Three Fe-Ni alloy films with different