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Author: Andrew Herzing

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1. Microscopic investigation of Single-Wall Carbon Nanotube Uptake by Daphnia magna
Published: 12/18/2013
Authors: Aaron Edgington, Elijah J Petersen, Andrew A Herzing, Apparao Rao, Stephen Klaine
Abstract: The objectives of this study were to determine the absorption of single-wall carbon nanotubes (SWCNTs) across the gut epithelial cells in Daphnia magna and to determine if absorption was influenced by their surface functionalization. This project ut ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911372

2. Visualization of phase evolution in model organic photovoltaic structures via energy-filtered transmission electron microscopy
Published: 8/9/2013
Authors: Andrew A Herzing, Hyun W. Ro, Christopher L Soles, Dean M DeLongchamp
Abstract: The morphology of the active layer in an organic photovoltaic bulk-heterojunction device is controlled by the extent and nature of phase separation during processing. Herein, we have examined the effects of fullerene crystallinity in the most wi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913752

3. Robust Elemental Mapping of Nanostructures at Ultrahigh Resolution using Event-Streamed Spectrum Imaging in an Aberration-Corrected Analytical Electron Microscope
Published: 4/1/2013
Authors: Andrew A Herzing, Ian M. Anderson
Abstract: We detail the application of X-ray energy dispersive spectroscopy (XEDS) event-streamed spectral imaging (ESSI) in an aberration-corrected analytical electron microscope (AEM) as a reliable method for the acquisition of ultra-high spatial resolution ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910229

4. Size-Dependent Structural Distortions
Published: 1/7/2013
Authors: Michael D. Anderson, Colby L. Heideman, Qiyin Lin, Mary Smeller, Robert S. Kokenyesi, Andrew A Herzing, Ian M. Anderson, Douglas A. Keszler, Paul Zschack, David C. Johnson
Abstract: Recently we reported that intergrowth compounds [(MSe)1+y]m(TSe2)n, with M = {Pb, Bi Ce} and T = {W, Nb, Ta} self assemble from designed precursors. The values of m and n represent, respectively, the number of MSe and TSe2 structural units of the uni ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913005

5. Effect of Tin Doping on alpha-Fe2O3 Photoanodes for Water Splitting
Published: 6/28/2012
Authors: Christopher Bohn, Amit Kumar Agrawal, Erich C. Walter, Mark D Vaudin, Andrew A Herzing, Paul M Haney, Albert A. Talin, Veronika A Szalai
Abstract: Sputtered-deposited films of α-Fe2O3 of thickness 600 nm were investigated as photoanodes for solar water splitting and found to have photocurrents as high as 0.8 mA/cm2 at 1.23 V vs. the reversible hydrogen electrode (RHE). The incorporati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911006

6. Nanoscale structure measurements for polymer-fullerene photovoltaics
Published: 2/3/2012
Authors: Dean M DeLongchamp, Regis J Kline, Andrew A Herzing
Abstract: This review covers methods to measure key aspects of nanoscale structure in organic photovoltaic devices based on polymer-fullerene bulk heterojunctions. The importance of nanoscale structure to the power conversion efficiency and stability of these ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909336

7. Imaging and Micronaylsis of Supported Metal Catalysts in the Analytical Electron Microscope
Published: 12/1/2011
Authors: Christopher J. Kiely, Andrew A Herzing
Abstract: The modern analytical electron microscope (AEM) is a powerful and versatile tool for the characterization of supported metal catalysts. The combination of atomic resolution images with chemical sensitivity at comparable length scales via X-ray energ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907454

8. Molecular Order in High-Efficiency Polymer/Fullerene Bulk Heterojunction Solar Cells
Published: 9/22/2011
Authors: Matthew R. Hammond, Regis J Kline, Andrew A Herzing, Lee J Richter, David Germack, Hyun W. Ro, Christopher L Soles, Daniel A Fischer, Tao Xu, Luping Yu, Michael F. Toney, Dean M DeLongchamp
Abstract: We report quantitative measurements of ordering, molecular orientation, and nanoscale morphology in the active layer of bulk heterojunction organic photovoltaic cells based on a thieno[3,4-b]thiophene-alt-benzodithiophene copolymer (PTB7), which has ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908836

9. Selective Oxidation of Glycerol by Highly Active Bimetallic Catalysts at Ambient Temperature under Base Free Conditions
Published: 8/24/2011
Authors: Andrew A Herzing, Gemma L. Brett, Peter Miedziak, Nikolaos Dimitratos, Meenakshisundaram Sankar, Marco Conte, Jose Antonio Lopez-Sanchez, David W Knight, Stuart H Taylor, Graham J Hutchings, Qian He, Christopher J Kiely
Abstract: AuPt or AuPd nanoparticles when supported on Mg(OH)2 are highly active for the selective oxidation of glycerol under base-free conditions at ambient temperatures. When bimetallic particles with the appropriate composition are prepared, catalysts wit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907936

10. One-dimensional p-n heterojunctions of zinc oxide on gallium nitride: A structural characterization
Published: 7/1/2011
Authors: Babak Nikoobakht, John E Bonevich, Andrew A Herzing
Abstract: Recently we showed lateral growth of ZnO nanowires and nanowalls on single crystal GaN and formation of bi- and tri-directional assembly of nanowires and nanowalls using a surface-directed vapor-liquid-solid process (SVLS). Taking advantage of this ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907758



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