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Search Publications by: Winnie Wong-Ng (Fed)

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Displaying 76 - 100 of 274

X-ray Diffraction and Density Functional Theory Studies of R2FeCoO6 (R=Pr, Nd, Sm, Eu, Gd)

December 6, 2016
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Igor Levin, Izaak Williamson, P Ackerman, Kevin R. Talley, Khawla AlHamdan, James A. Kaduk, Lan Li
The structure and thermoelectric properties of a series of lanthanide iron cobalt oxides, R2FeCoO6 (R = Pr, Nd, Sm, Eu and Gd), have been investigated. The space group of these compounds was confirmed to be orthorhombic Pnma (No.62), Z=4. From Gd to Pr

X-ray Powder Diffraction Reference Patterns for Bi1-xPbxOCuSe

September 16, 2016
Author(s)
Winnie K. Wong-Ng, Yonggao Yan, James A. Kaduk, Xinfeng Tang
The structures and powder X-ray reference diffraction patterns of the ‘natural superlattice’ series Bi1-xPbxOCuSe (x=0, 0.02, 0.04, 0.06, 0.08 and 0.1) have been investigated. As the ionic radius of Pb2+ is greater than that of Bi3+, the unit cell volume

FREE-STANDING SELF-ASSEMBLIES OF GALLIUM NITRIDE NANOPARTICLES: A REVIEW

July 19, 2016
Author(s)
Winnie K. Wong-Ng, Yucheng Lan, Jianye Li, Rola M. Derbeshi, Abdellah Lisfi
Gallium nitride (GaN) is an III-V semiconductor with a direct band-gap of 3.4 eV. GaN has important potentials in white light-emitting diodes, blue lasers, and field effect transistors because of its super thermal stability and excellent optical properties

PORPHYRIN-BASED CHEMISTRY FOR CARBON CAPTURE AND SEQUESTRATION

July 8, 2016
Author(s)
Winnie K. Wong-Ng, Lawrence P. Cook, Greg Brewer
Two major types of porphyrinic framework structures offer promise for carbon capture and sequestration (CCS) applications: 1) metal-organic frameworks (MOFs) in which the porphyrins serve as struts linking vertices comprised of metal -based clusters; 2)

The 2015 Materials Science &Technology (MS&T15) Conference & Exhibition

June 8, 2016
Author(s)
Winnie Wong-Ng
The Materials Science &Technology 2015 Conference & Exhibition took place in the Greater Columbus Convention Center in Columbus, Ohio, from Oct 4 to 8. . It was co-sponsored by five leading materials engineering societies (the American Ceramic Society

Living History - My Journey through Crystallography and Related Science

May 30, 2016
Author(s)
Winnie K. Wong-Ng
This is an invited brief memoir by the American Crystallographic Association (ACA) Newsletter Editor. In this memoir, a brief history of Winnie Wong-Ng’s earlier childhood, her academic journey from Hong Kong to the US, her career developments after her

Preface (Semiconductor Materials for Solar Photovoltaic Cells)

May 18, 2016
Author(s)
Winnie Wong-Ng, Mariappan Paranthaman, Raghu Bhattacharya
This introductory chapter briefly describes the book "Semiconductor Materials for Solar Photovoltaic Cells", coedited by M. Parans Paranthaman, Winnie Wong-Ng, and Raghu N. Bhattacharya (Springer US, 2015). This essential reference provides the most

Improved thermoelectric performance of (Fe,Co)Sb3-type skutterudites from first-principles

February 3, 2016
Author(s)
Winnie K. Wong-Ng, Izaak Williamson, Logan J. Her, Xianli Su, Yonggao Yan, Lan Li
Skutterudite materials have been considered as promising thermoelectric candidates due to intrinsically good electrical conductivity and tailorable thermal conductivity. Options for improving thermal-to-electrical conversion efficiency include identifying

Synchrotron X-ray Investigation of alpha-Chlorohemin, C34H32ClFeN4O4, an Fe-porphyrin

January 28, 2016
Author(s)
Winnie K. Wong-Ng, James A. Kaduk, Lawrence P. Cook, B Chakraborty, Greg Brewer
X-ray data of a powder sample of alpha-chlorohemin (a member of the porphyrin family), C34H32ClFeN4O4, was collected using synchrotron radiation at the Advanced Photon Source (APS, Argonne National Laboratory). Rietveld Refinement and Density Functional

Observation of the reduction of thermal conductivity in a p-type nanostructured half-Heusler using neutron inelastic scattering

November 24, 2015
Author(s)
Winnie K. Wong-Ng, Jeffrey W. Lynn, Qingzhen Huang, Craig Brown, James A. Kaduk, Giri Joshi
To understand the role of the nanophase in reducing the lattice contribution of the thermal conductivity of thermoelectrics, the structure and phonon density of a p-type half-Heusler thermoelectric ingot (ingot-HH, nominal composition of (Hf0.5Zr0.5)Co(Sb0

Advances in Materials Science for Environmental and Energy Technologies IV (Preface)

September 4, 2015
Author(s)
Winnie K. Wong-Ng, Josef Matyas, Tatsuki Ohji, Kanakala Raghunath, Gary Pickrell
The Materials Science and Technology 2014 Conference and Exhibition (MS&T’14) was held October 12-16, 2014 at the David L. Lawrence Convention Center, Pittsburgh, Pennsylvania. One of the major themes of the conference was Environmental and Energy Issues

X-ray Powder Diffraction Studies of (BaxSr1-x)2Co2Fe12O22 and (BaxSr1-x)Co2Fe16O27

June 30, 2015
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Yonggao Yan, Kevin R. Talley, James A. Kaduk
X-ray structural characterization and X-ray reference powder patterns have been determined for two series of iron- and cobalt-containing layered compounds, namely, (BaxSr1-x)2Co2Fe12O22 (x = 0.2, 0.4, 0.6, 0.8) and (BaxSr1-x)Co2Fe16O27 (x = 0.2, 0.4, 0.6

Phase Equilibria and Crystal Chemistry of the CaO-?Sm2O3-CoOz System at 885 degC in Air

June 27, 2015
Author(s)
Winnie K. Wong-Ng, William J. Laws, Saul H. Lapidus, James A. Kaduk
The CaO-¿Sm2O3-CoOz system prepared at 885 °C in air consists of two calcium cobaltate compounds, namely, the 2D thermoelectric oxide solid solution, (Ca3-xSmx)Co4O9-z (0 x 0.5) which has a misfit layered structure, and the 1D Ca3Co2O6 which consists of

Flexible metal-organic framework compounds: In situ studies for selective CO2 capture

June 19, 2015
Author(s)
Andrew J. Allen, Laura Espinal, Winnie K. Wong-Ng, Wendy Queen, Craig Brown, Steven R. Kline, Kristi L. Kauffman, Jeffrey T. Culp
Results from in situ experiments are presented to correlate carbon capture with dynamic structural changes in two flexible metal-organic framework (MOF) materials: porous coordination polymers (PCPs) exhibiting promising carbon dioxide adsorption

Reference Diffraction Patterns, Microstructure, and Pore Size Distribution for the Copper (II) benzene-1,3,5-tricarboxylate Metal Organic Framework (Cu-BTC) Compounds

March 1, 2015
Author(s)
Winnie K. Wong-Ng, James A. Kaduk, Daniel W. Siderius, Andrew J. Allen, Laura Espinal, Brad Boyerinas, Igor Levin, Matthew Suchomel, Jan Ilavsky, Eric J. Cockayne, Hui Wu
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 technique, the

Seebeck Coefficient Metrology: Do Contemporary Protocols Measure Up?

January 29, 2015
Author(s)
Joshua B. Martin, Winnie K. Wong-Ng, Martin L. Green
Comparative measurements of the Seebeck coefficient are challenging due to the diversity of instrumentation and measurement protocols. With the implementation of standardized measurement protocols and the use of Standard Reference Materials (SRMs®), for