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You searched on: Author: Andrew Herzing

Displaying records 1 to 10 of 27 records.
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1. Oxidation State Sensitive Imaging of Ceria by Atomic-Resolution Low Angle Annular Dark Field Scanning Transmission Electron Microscopy
Published: 12/17/2015
Authors: Aaron C Johnston-Peck, Jonathan P Winterstein, Alan D Roberts, Joseph S DuChene, Kun Qian, Brendan C Sweeny, Wei David Wei, Renu Sharma, Eric A. Stach, Andrew A Herzing

2. Vapor-Liquid-Solid Etch of Semiconductor Surface Channels by Running Gold Nanodroplets
Published: 11/24/2015
Authors: Babak Nikoobakht, Andrew A Herzing, Shinichiro Muramoto, Jerry Tersoff
Abstract: We show that Au nanoparticles spontaneously move across the (001) surface of InP, InAs, and GaP when heated in the presence of water vapor. As they move, the particles etch crystallographically aligned grooves into the surface. We show that this pr ...

3. Substitutional Doping in Nanocrystal Superlattices
Published: 8/27/2015
Authors: Aaron C Johnston-Peck, Matteo Cargnello, Benjamin T. Diroll, Eric Wong, Bianca Datta, Divij Damodar, Vicky V. T. Doan-Nguyen, Andrew A Herzing, Cherie R. Kagan, Christopher B. Murray

4. 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 ...

5. Scalable Synthesis and Device Integration of Self-Registered One-Dimensional Zinc Oxide Nanostructures and Related Materials
Published: 9/28/2013
Authors: Babak Nikoobakht, Xudong Wang, Andrew A Herzing, Jian Shib
Abstract: On integrating one-dimensional (1D) nanocrystals (nanowires) to useful devices, in this review article, we provide a background on growth processes and how they impact device integration strategies. Successful integration of nanowires to devices and ...

6. Visualization of phase evolution in model organic photovoltaic structures via energy-filtered transmission electron microscopy
Published: 8/9/2013
Authors: Andrew A Herzing, Hyun Wook 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 ...

7. 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 ...

8. 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 ...

9. Effect of Tin Doping on alpha-Fe2O3 Photoanodes for Water Splitting
Published: 6/28/2012
Authors: Christopher C. 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 ...

10. 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 ...

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