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Search Publications by: Matthew E Staymates (Fed)

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Displaying 1 - 25 of 41

Improving Particle Collection Efficiency of Sampling Wipes used for Trace Chemical Detection

December 14, 2023
J Greg Gillen, Jeffrey Lawrence, Edward Sisco, Matthew E. Staymates, Liz Robinson, Jennifer R. Verkouteren, Alexander Bulk
Improvement of the particle collection efficiency of sampling wipes is desirable for optimizing the performance of many wipe-based chemical analysis techniques used for trace chemical screening applications. In this note, commercially available Teflon

Specification for Interoperability Testing of Contactless Fingerprint Acquisition Devices

June 8, 2022
John M. Libert, Shahram Orandi, Bruce Bandini, Kenneth Ko, Craig I. Watson, Christopher Stafford, Matthew E. Staymates, John Grantham
This guidance specifies a protocol and associated metrics for the evaluation of contactless fingerprint acquisition device, and their interoperability with legacy devices. This protocol enables contactless fingerprint developers seeking certification of

Hydration of Hydrophilic Cloth Facial Coverings Greatly Increases the Filtration Properties for Nanometer and Micrometer-sized Particles

March 8, 2021
Christopher D. Zangmeister, James Radney, Matthew E. Staymates, Edward P. Vicenzi, Jamie Weaver
Filtration efficiencies (FE) of natural, synthetic, and blended fabrics were measured as a function of relative humidity (RH) for particles with mobility diameters between 50 nm and 825 nm. Fabrics were equilibrated at 99 % RH, mimicking conditions

Optimization of Confined DART-MS

February 14, 2020
Edward R. Sisco, Matthew E. Staymates, Thomas P. Forbes
The use of direct analysis in real time mass spectrometry (DART-MS) is seeing increased use in a number of fields, including forensic science, environmental monitoring, food safety, and healthcare. With the increased use, novel configurations have been

A Standards and Measurement Infrastructure for Calibration, Verification and Optimization of Trace Explosives Detection Systems

April 15, 2019
John G. Gillen, Jennifer R. Verkouteren, R M. Verkouteren, Marcela N. Najarro, Edward R. Sisco, Matthew E. Staymates, Jessica L. Staymates, Robert A. Fletcher, Jeffrey A. Lawrence, Elizabeth L. Robinson, Alexander T. Bulk, Joseph A. Bennett, Shinichiro Muramoto, Thomas P. Forbes
Current national priorities in homeland security have led to an unprecedented level of utilization of explosives trace detection (ETD) systems for counterterrorism and law enforcement. Despite the widespread deployment of ETD instruments at airports

DART-MS analysis of inorganic explosives using high temperature thermal desorption

May 4, 2017
Thomas P. Forbes, Edward R. Sisco, Matthew E. Staymates, John G. Gillen
An ambient mass spectrometry (AMS) platform coupling Joule heating thermal desorption (JHTD) and direct analysis in real time (DART) was developed, generating discretely pulsed rapid heating ramps and elevated temperatures for the detection of inorganic

Standardized Measurements of Collection Efficiency from Wipe-Sampling of Trace Explosives

April 10, 2017
Jennifer R. Verkouteren, Jeffrey A. Lawrence, Matthew E. Staymates, Edward R. Sisco
One of the limiting steps to detecting traces of explosives at screening venues is effective collection of the sample. Wipe-sampling is the most common procedure for collecting traces of explosives, and standardized measurements of collection efficiency

Biomimetic Sniffing with an Artificial Dog’s Nose Leads to Improvements in Vapor Sampling and Detection

December 1, 2016
Matthew E. Staymates, William A. MacCrehan, Jessica L. Staymates, John G. Gillen, Brent Craven, Rod Kunz, Ted Mendum, Ta-Hsuan Ong
This work presents fluid flow visualization studies and chemical detection experiments using an 3D printed anatomically-correct biomimetic canine nose from a female Labrador retriever. Schlieren imaging, high-speed videography, along with flow

Particle Fabrication Using Inkjet Printing onto Hydrophobic Surfaces for Optimization and Calibration of Trace Contraband Detection Sensors

November 24, 2015
John G. Gillen, Marcela N. Najarro, Matthew E. Staymates, Scott A. Wight, Marlon L. Walker, Jennifer R. Verkouteren, Eric S. Windsor, Aaron A. Urbas
A method has been developed to fabricate patterned arrays of micrometer-sized monodisperse solid particles of ammonium nitrate on hydrophobic silicon surfaces using inkjet printing. The method relies on dispensing one or more microdrops (typically 50 pL

The effect of reusing wipes for particle collection

November 4, 2015
Jessica L. Staymates, Matthew E. Staymates, Jeffrey A. Lawrence
This work addresses the need for a method to measure the collection efficiency performance of surface wipe materials as a function of wipe reuse number. The primary purpose of this study is to investigate the effect of wipe reuse, i.e. the number of times

Quantifying Trace 2,4,6-Trinitrotoluene (TNT) in Polymer Microspheres

October 16, 2015
Timothy M. Brewer, Robert A. Fletcher, Matthew E. Staymates
Well characterized test materials are essential for validating the performance of current trace explosive detection systems. Explosive encapsulated microspheres have proven to be a valuable test material for trace explosive detection because their precise