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You searched on: Author: Andrew Allen

Displaying records 1 to 10 of 81 records.
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1. In Situ Structural Characterization of Ageing Kinetics in Aluminum Alloy 2024 across Angstrom-to-Micrometer Length Scales
Published: 6/1/2016
Authors: Fan Zhang, Lyle E Levine, Andrew John Allen, Carelyn E Campbell, Adam A Creuziger, Nataliya Kazantseva, Jan Ilavsky
Abstract: The precipitate structure and precipitation kinetics in an Al-Cu-Mg alloy (AA2024) aged at 190 °C, 208 °C, and 226 °C have been studied using ex situ TEM and in situ synchrotron-based, combined ultra-small angle X-ray scattering, small angle X-ray sc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919508

2. Orthogonal Analysis of Functional Gold Nanoparticles for Biomedical Applications
Published: 9/11/2015
Authors: De-Hao D. Tsai, Yi-Fu Lu, Frank W DelRio, Tae Joon Cho, Suvajyoti S. Guha, Michael Russel Zachariah, Fan Zhang, Andrew John Allen, Vincent A Hackley
Abstract: We report a comprehensive strategy based on implementation of orthogonal measurement techniques to provide critical and verifiable material characteristics for functionalized gold nanoparticles (AuNPs) used in biomedical applications. Thiolated polye ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918793

3. Simultaneous multiplexed materials characterization using a high-precision hard-X-ray micro-slit array
Published: 5/1/2015
Authors: Fan Zhang, Andrew John Allen, Lyle E Levine, Derrick C. Mancini, Jan Ilavsky
Abstract: The needs both for increased experimental throughput and for in-operando characterization of functional materials under increasingly realistic experimental conditions have emerged as major challenges across the whole of crystallography. Aiming to a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917168

4. Reference Diffraction Patterns, Microstructure, and Pore Size Distribution for the Copper (II) benzene-1,3,5-tricarboxylate Metal Organic Framework (Cu-BTC) Compounds
Published: 3/1/2015
Authors: Winnie K Wong-Ng, James A. Kaduk, Daniel W Siderius, Andrew John Allen, Laura Espinal, Brad Boyerinas, Igor Levin, Matthew Suchomel, Jan Ilavsky, Eric J Cockayne, Hui Wu
Abstract: Cu-paddle-wheel-based Cu3(BTC)2 (nicknamed Cu-BTC, where BTC ≡ benzene 1,3,5-tricarboxylate) is a metal organic framework (MOF) compound that adopts a zeolite topology. We have determined the pore size distribution using the Gelb and Gubbins te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915873

5. Structural and Dynamical Studies of Acid Mediated Conversion in Amorphous-Calcium-Phosphate Based Dental Composites
Published: 10/31/2014
Authors: Fan Zhang, Andrew John Allen, Lyle E Levine, Mark D Vaudin, Drago Skrtic, Joseph M Antonucci, Kathleen Mary Hoffman, Anthony Albert Giuseppetti, Jan Ilavsky
Abstract: Amorphous calcium phosphate (ACP) based composites are promising restorative dental materials attributable to ACP's capacity to release calcium and phosphate ions through a complex reaction in which ACP is converted to its crystalline, apatitic form ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914750

6. Dissolution, Agglomerate Morphology, and Stability Limits of Protein-Coated Silver Nanoparticles
Published: 8/19/2014
Authors: Matthew N. Martin, Andrew John Allen, Robert I. MacCuspie, Vincent A Hackley
Abstract: Little is understood about the impact coating molecules have on nanoparticle dissolution kinetics and intermediate agglomerate formation in a dilute nanoparticle dispersion. Dissolution and agglomeration processes compete in removing isolated nanopa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914386

7. Unveiling the Origin of a Nonequilibrium Dynamic Process Detected by X-Ray Photon Correlation Spectroscopy via a Finite Element Analysis Approach
Published: 7/1/2014
Authors: Li Ma, Fan Zhang, Andrew John Allen, Lyle E Levine
Abstract: It is a scientific and engineering challenge to characterize materials under nonequilibrium conditions. In recent years, X-ray photon correlation spectroscopy (XPCS), a synchrotron based coherent X-ray scattering technique, has been found useful in - ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914751

8. Use of Single Particle Inductively Coupled Plasma Mass Spectrometry to Characterize a New Silver Nanoparticle Reference Material
Published: 6/11/2014
Authors: Karen E Murphy, Jingyu Liu, William F Guthrie, Justin M Gorham, John E Bonevich, Andrew John Allen, Michael R Winchester, Vincent A Hackley, Robert MacCuspie
Abstract: 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 m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915912

9. Just Add Water ‹ reproducible singly dispersed silver nanoparticle suspensions
Published: 6/19/2013
Authors: Robert I. MacCuspie, Andrew John Allen, Matthew N. Martin, Vincent A Hackley
Abstract: Silver nanoparticles (AgNPs) are of interest due to their antimicrobial attributes, which are derived from their inherent instability and subsequent release of silver ions into solution. At the same time, this instability makes achieving stable long ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912366

10. Flexible Metal Organic Framework Compound, Ni(1,2-bis(4-pyridyl)ethylene)[Ni(CN)4]n, for CO2 Sorption Applications
Published: 4/7/2013
Authors: Winnie K Wong-Ng, Jeffrey T Culp, Yu-Sheng Chen, Laura Espinal, Andrew John Allen, Daniel W Siderius, Craig Brown, Wendy Queen, Peter Zavalij, Christopher Matranga
Abstract: New sorbent materials are required for carbon capture because coal-fired electrical power plants, the largest emitters of this greenhouse gas, will continue to produce much of our nation‰s electricity for at least several decades. Within the family o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912660



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