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Search Publications by: J Greg Gillen (Fed)

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Displaying 1 - 25 of 110

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

December 31, 2021
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

Visualizing Shed Skin Cells in Fingerprint Residue using Dark Field Microscopy

March 5, 2020
Shinichiro N. Muramoto, William Alexander Osborn, J Greg Gillen
The proof of concept study was able to show that dark field microscopy could be used to provide sufficient contrast for cell visualization in fingerprints with high sebum content. Although the application is limited to smooth surfaces that do not scatter

Emerging techniques for the detection of pyrotechnic residues from seized postal packages containing fireworks

January 24, 2020
John Gillen, Thomas Forbes, Jennifer R. Verkouteren, Shannon T. Krauss, Karlijn Bezemer, Arian C. van Asten, Peter J. Shoenmakers, Mattijs Koeberg
High volume screening of parcels with the aim to trace the illegal distribution and selling of fireworks using postal services is challenging. Inspection services have limited manpower and means to perform extensive visual inspection. In this study, the

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

Targeting hMSC Response via Surface Carbonyl Groups, Contact Angle, and Protein Interactions

March 1, 2019
Max J. Lerman, Shinichiro Muramoto, Navein Arumugasaamy, Michael Van Order, Josephine Lembong, Anushka Gerald, John G. Gillen, John P. Fisher
Traditional 2D culture systems made of polystyrene (PS) require the addition of surface chemistry beyond the nominal phenyl groups present to facilitate and encourage cell adhesion. Determining the surface properties which enhance protein adhesion from

3D Printing in Cell Culture Systems and Medical Applications

December 18, 2018
Max J. Lerman, Josephine Lembong, John G. Gillen, John P. Fisher
3D printing serves an important role in various biomedical research applications, including but not limited to culture systems and implantable devices. In this review, we discuss recent development in the applications of 3D printing technologies for

The Evolution of Polystyrene as a Cell Culture Material: A Brief History

April 10, 2018
Max J. Lerman, Josephine Lembong, Shinichiro Muramoto, John G. Gillen, John P. Fisher
Polystyrene (PS) has brought in vitro cell culture from its humble beginnings to the modern era, propelling dozens of research fields along the way. This review discusses the development of the material, fabrication, and treatment approaches to create the

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

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

Development of a Chemically Relevant Artificial Fingerprint Material

September 16, 2015
Edward Sisco, Jessica L. Staymates, Katherine Schilling, John Gillen
The development of a chemically relevant artificial fingerprint material as well as a preliminary method for fingerprint deposition is discussed herein. More specifically the improvement of an artificial sweat material, an artificial sebaceous material

Low Temperature Plasma for Bevel Crater Depth Profiling of Crosslinking Organic Multilayers: Comparison with C60 and Argon Gas Cluster Sources

July 6, 2014
Shinichiro Muramoto, Derk Rading, Brian G. Bush, John G. Gillen, David G. Castner
A model delta layer system made of thin films of an organometallic chelate and an aromatic molecule (aluminum hydroxyquinolinate and bathocuproine), both that crosslink under traditional ion beam irradiation, was used to evaluate the effectiveness of using