U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Winnie Wong-Ng (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 274

Synthesis, Structural and Sorption Characterization of a Hofmann Compound, Ni(3-Methy-4,4'-bipyridine)[Ni(CN)4]

March 6, 2021
Author(s)
Winnie Wong-Ng, Jeffrey T. Culp, Daniel Siderius, Yu-Sheng Chen, S. Y. G. Wang, Andrew J. Allen, Eric J. Cockayne
Crystal structure of the guest-free Ni(CN)4-based metal organic framework Ni(3-Methy-4,4'-bipyridine)[Ni(CN)4] (nicknamed Ni-BpyMe(A)), was determined to be orthorhombic, Pmma, a= 12.6025(4) Å, b=7.3324(3) Å, c=11.3095(4) Å, V=1045.07 (2) Å3 and Z=2

Crystal Chemistry, X-ray Diffraction Reference Patterns, and Band Gap Studies for (BaxSr1-x)2CoWO6 (x=0.1, 0.2, 0.3, 0.5, 0.7, 0.9)

September 11, 2020
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Yuqi Yang, Rola M. Derbeshi, Donald A. Windover, James A. Kaduk
X-ray reference powder patterns and structures have been determined for a series of cobalt- and tungsten-containing cubic alkaline-earth perovskites, (BaxSr1-x)2CoWO6 (x=0.1, 0.2, 0.3, 0.5, 0.7, 0.9). The structure of the end members of the series

Optical and electrical properties in Na and Rh co-doped Ruddlesden-Popper layered Ca3Ti2O7

September 9, 2020
Author(s)
Qiang Gu, Weifang Liu, Winnie Wong-Ng, Xingxing Wu, Yao Jiang, Chao Wang, Shuang Ma, Shouyu Wang
Layered perovskite Ca2.91Na0.09Ti2-xRhxO7 (x=0.00, 0.02, 0.04, 0.06) were synthesized by a conventional solid-state reaction. The two strongest peaks of XRD shift to the lower 2θ region with an increase of Rh content, demonstrating changing of lattice

Crystal Chemistry and Phase Equilibria of the CaO- 1/2Ho2O3-CoOz System at 885 degC in Air

July 2, 2020
Author(s)
Winnie K. Wong-Ng, William J. Laws, Qingzhen Huang, Jie Hou, James A. Kaduk, Saul H. Lapidus, Lynn Ribaud
The phase diagram of the CaO-½Ho2O3-CoOz system was determined at 885 ºC in air. This diagram offers detailed compatibility relationships in the ternary oxide system that are essential for processing and for the understanding of thermoelectric properties

Structural and Optical Properties of Ba3(Nb6-xTax)Si4O26 (x=0.6, 1.8, 3.0, 4.2, 5.4)

December 5, 2019
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Weifang Liu, Yuqi Yang, Shouyu Wang, Yucheng Lan, James A. Kaduk
Structure and optical properties have been successfully determined for a series of titanium- and cobalt-containing layered alkaline-earth silicate compounds, Ba3(Nb1-xTax)Si4O26 (x=0.6, 1.8, 3.0, 4.2, 5.4). The structure of this solid solution was found to

TOPOLOGY OF VOIDS AND CHANNELS IN SELECTED PORPHYRINIC COMPOUNDS

December 1, 2019
Author(s)
Lawrence P. Cook, Greg Brewer, Daniel Siderius, Winnie Wong-Ng
Porphyrinic compounds are of increasing interest to the materials science community, yet little attention has been paid to crystallographically controlled voids and channels in these materials. We have conducted an initial survey of the voids and channels

Ceramic Materials and Powder Diffraction

September 15, 2019
Author(s)
Winnie K. Wong-Ng
Contrary to general public’s perception of ceramics as primarily encompassing art work, table ware, porcelain enamels, tiles, and sanitary ware, ceramics cover a broad range of materials and applications. We have attempted to categorize these materials in

Major improvement of ferroelectric and optical properties in Na-doped Ruddlesden-Popper layered hybrid improper ferroelectric compound, Ca3Ti2O7

August 20, 2019
Author(s)
Cong Hang, Wei Fang Liu, Winnie Wong-Ng, Ziongnan Zhang, Yao Jiang, Ping Wu, Baoyuan Tong, Hui Zhao, Shouyu Wang
Ruddlesden-Popper layered Ca3-xNaxTi2O7 (x=0 and 0.15) ceramics were successfully prepared by a conventional solid-state reaction process. The polarization and leakage currents were increased after Na doping. XPS spectra showed an increasing concentration

Crystallographic and Optical Properties of Ba(Co1-xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8)

June 20, 2019
Author(s)
Rola M. Derbeshi, Winnie Wong-Ng, Jude Anike, Wei Fang Liu, Nacole B. King, Shouyu Wang, James A. Kaduk, Yucheng Lan
Structural characterization and X-ray reference powder pattern determination have been condcuted for the Co- and Zn-containing tridymite derivatives Ba(Co1-xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8). The bright blue series of Ba(Co1-xZnx)SiO4 crystallized in the

Carbon Capture and Storage Properties of Porous Octahedral Molecular Sieve

March 7, 2019
Author(s)
Matthew Lawson, Jarod C. Horn, Winnie Wong-Ng, Laura Espinal, Huong Giang Nguyen, James A. Kaduk, Saul H. Lapidus, Yongtao Meng, Steven L. Suib, Lan Li
Based on the experimentally determined framework structure of porous MnO2 octahedral molecular sieve (OMS)-5, we used density functional theory-based calculations to evaluate the effect of Na+ cation on pore dimensionality and structural stability, and the

Structural basis of CO2 adsorption in a flexible metal organic framework material

March 4, 2019
Author(s)
Andrew J. Allen, Winnie K. Wong-Ng, Eric J. Cockayne, Jeffrey T. Culp, Christopher Matranga
This paper reports the structural basis of CO2 adsorption in a representative model flexible metal organic framework (MOF) material, Ni(1,2-bis(4-pyridyl)ethylene)[Ni(CN)4] (NiBpene or PICNIC-60). NiBpene exhibits a CO2 sorption isotherm with

Control of thermal expansion in a low-density framework modification of silicon

September 30, 2018
Author(s)
Beekman Mathew, James A. Kaduk, Winnie Wong-Ng, George S. Nolas
The low-density clathrate-II modification of silicon, Si136, contains two distinct cage-like voids large enough to accommodate various types of guest atoms which influence both the host structure and its properties. Although the linear coefficient of

Electronic Structure, Pore Size Distribution, and Sorption Characterization of an unusual MOF, {[Ni(dpbz)][Ni(CN)4]}n, dpbz=1,4-bis(4-pyridyl)benzene

September 26, 2018
Author(s)
Winnie K. Wong-Ng, Izaak Williamson, Daniel W. Siderius, Jeffrey T. Culp, Yu-Sheng Chen, Lan Li, Matthew Lawson
The monoclinic (Ni(L)[Ni(CN)4] (L= 1,4-Bis(4-pyridyl) benzene) compound (nick-name Ni-dpbz) is a flexible metal organic framework (MOF) which assumes a pillared structure with layers defined by 2D Ni[Ni(CN)4]n nets and dpbz ligands as pillars. The

Ba8Cu16As30: A cationic-framework clathrate-I arsenide

August 10, 2018
Author(s)
Kaya Wei, Artem R. Khabibullin, Dean Hobbis, Winnie Wong-Ng, Tieyan Chang, SuYin G. Wang, Igor Levin, Yu-Sheng Chen, Lilia M. Woods, George S. Nolas
Single crystals of clathrate-I Ba8Cu16As30 have been synthesized, and their structure and electronic properties deter-mined using synchrotron-based X-ray diffraction and first principles calculations. The structure is confirmed to be cubic and defined by a

Materials and Processes for CO2 Capture, Conversion and Sequestration

May 26, 2018
Author(s)
Winnie K. Wong-Ng, Lan Li, Lawrence P. Cook, Kevin Huang
The book “Materials and Processes for CO2 Capture, Conversion and Sequestration (CCS)” which will be published by John Wiley & Sons, Inc., is a result of the symposium of the same title which took place in 2014 during the MS&T (Materials Science and