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You searched on: Author: John Gillen

Displaying records 1 to 10 of 87 records.
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1. Development of a Chemically Relevant Artificial Fingerprint Material
Published: 9/16/2015
Authors: Edward Ryan Sisco, Jessica L Staymates, Katherine Schilling, John G Gillen
Abstract: 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 mater ...

2. A Novel Test Sample for the Quantification of Illicit Drugs in Fingerprints using Imaging Mass Spectrometry
Published: 4/27/2015
Authors: Shinichiro Muramoto, Thomas P Forbes, Arian C. van Asten, John G Gillen
Abstract: A novel standard for the forensic analysis of fingerprints was introduced and characterized using time-of-flight secondary ion mass spectrometry (ToF-SIMS) and desorption electrospray ionization mass spectrometry (DESI-MS), aimed at the trace level d ...

3. Low Temperature Plasma for Bevel Crater Depth Profiling of Crosslinking Organic Multilayers: Comparison with C60 and Argon Gas Cluster Sources
Published: 7/6/2014
Authors: Shinichiro Muramoto, Derk Rading, Brian G Bush, John G Gillen, David G Castner
Abstract: 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 ...

4. Method for combined biometric and chemical analysis of human fingerprints
Published: 6/2/2014
Authors: Jessica L Staymates, Shahram Orandi, Matthew E Staymates, John G Gillen
Abstract: This paper describes a method for combining direct chemical analysis of latent fingerprints with subsequent biometric analysis within a single sample. The method described here uses ion mobility spectrometry (IMS) as a chemical detection method for e ...

5. Characterization of Emerging Ambient Pressure Mass Spectrometric Techniques using Time-of-Flight Secondary Ion Mass Spectrometry
Published: 3/28/2014
Authors: Shinichiro Muramoto, Thomas P Forbes, Matthew E Staymates, John G Gillen
Abstract: Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used to characterize the desorption performance of two emerging ambient ionization mass spectrometry (MS) sources; desorption electrospray ionization (DESI) and low temperature plasma (LTP ...

6. 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 ...

7. 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 ...

8. Evaluation of C60 Secondary Ion Mass Spectrometry for the Chemical Analysis and Imaging of Fingerprints
Published: 1/22/2013
Authors: Edward Ryan Sisco, Leonard Demovanville, John G Gillen
Abstract: The feasibility of using C60 Cluster Primary Ion Bombardment Secondary Ion Mass Spectrometry (C60 SIMS) for the analysis of the chemical composition of fingerprints is evaluated. It was found that C60 SIMS could be used to detect and image the spat ...

9. Evaluation of a drop-on-demand micro-dispensing system for development of artificial fingerprints
Published: 12/7/2012
Authors: Jessica L Staymates, Matthew E Staymates, John G Gillen
Abstract: Precision micro-dispensing is a growing technique that has many applications in the scientific and additive manufacturing communities. Piezoelectric inkjet printing is capable of accurately dispensing exceedingly small volumes of low-viscosity soluti ...

10. 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 ...

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  • SP 250-XX: Calibration Services
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