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Search Publications by: Michael R. Winchester (Fed)

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Displaying 26 - 50 of 89

Silver nanoparticles: technological advances, societal impacts, and metrological challenges

February 21, 2017
Author(s)
Bryan Calderon Jimenez, Monique E. Johnson, Antonio R. Montoro Bustos, Karen E. Murphy, Michael R. Winchester, Jose R. Vega Baudrit
Silver nanoparticles (AgNPs) show different physical and chemical properties compared to their macroscale analogs. This is primarily due to their small size and, consequently, the exceptional surface area of these materials. Presently, advances in the

NIST Calibration Facility for Sizing Spheres Suspended in Liquids

February 19, 2017
Author(s)
Michelle K. Donnelly, George Mulholland, Michael R. Winchester
A calibration facility has been developed to measure the peak diameter of particles suspended in liquid using differential mobility analysis (DMA). A description of the facility and the features that contribute to measurements with low uncertainties is

Quantification of carbon nanotubes in environmental matrices: Current capabilities, case studies, and future improvements

April 6, 2016
Author(s)
Elijah J. Petersen, D. X. Flores-Cervantes, Thomas Bucheli, Lindsay C. Elliott, Jeffrey A. Fagan, Alexander Gogos, Shannon Hanna, Antonio R. Montoro Bustos, Desiree L. Plata, Vytautas Reipa, Paul Westerhoff, Michael R. Winchester, Elisabeth Mansfield
Carbon nanotubes (CNTs) have numerous exciting potential applications approaching commercialization. As such, quantitative measurements of CNTs in key environmental matrices (water, soil, sediment, and biological tissues) are needed to address concerns

Preparation of silver nanoparticle loaded cotton threads to facilitate measurement development for textile applications

January 26, 2015
Author(s)
Justin M. Gorham, Karen E. Murphy, Jingyu Liu, Dimitri Tselenchuk, Gheorghe NMN Stan, Thao M. Nguyen, Richard D. Holbrook, Michael R. Winchester, Robert F. Cook, Robert MacCuspie, Vincent A. Hackley
FOREWORD This NIST special publication (SP) is one in a series of NIST SPs that address research needs articulated in the National Nanotechnology Initiative (NNI) Environmental, Health, and Safety Research Strategy published in 2011 [1]. This Strategy

Use of Single Particle Inductively Coupled Plasma Mass Spectrometry to Characterize a New Silver Nanoparticle Reference Material

June 11, 2014
Author(s)
Karen E. Murphy, Jingyu Liu, William F. Guthrie, Justin M. Gorham, John E. Bonevich, Andrew J. Allen, Michael R. Winchester, Vincent A. Hackley, Robert MacCuspie
In this study we use inductively coupled plasma mass spectrometry operated in single particle mode (spICP-MS) to simultaneously characterize the size distribution and dissolved silver fraction of a new silver nanoparticle (AgNP) candidate reference

Capabilities of Single Particle Inductively Coupled Plasma Mass Spectrometry for the Size Measurement of Nanoparticles: A Case Study on Gold Nanoparticles

February 28, 2014
Author(s)
Jingyu Liu, Karen E. Murphy, Robert I. MacCuspie, Michael R. Winchester
The increasing application of engineered nanomaterials in consumer and medical products has motivated the development of single particle inductively coupled plasma mass spectrometry (spICP-MS) for characterizing nanomaterials under realistic environmental