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Materials

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Displaying 1051 - 1075 of 2328

Investigation of Alteration of Li-6 Enriched Neutron Shielding Glass

January 31, 2018
Author(s)
Jamie Weaver, Danyal J. Turkoglu
Silicate glass doped with 6Li is a common slow neutron shielding material, and has been utilized as such in several neutron research facilities. 6Li is a unique isotope for thermal neutron capture as it has a large thermal neutron capture cross section (≈

Unraveling the Complex Hydration Behavior of Ionomers Under Thin Film Confinement

January 16, 2018
Author(s)
Shudipto K. Dishari, Christopher A. Rumble, Mark Maroncelli, Joseph Dura, Michael A. Hickner
Ionomers in thin films behave differently from bulk membranes and their behavior is not well understood. Here, thin films (25-250 nm) of sulfonated Radel (S-Radel) were investigated to understand thickness and hydration effects on the density and

Quantification of DNA/SWCNT Solvation Differences by Aqueous Two Phase Separation

January 8, 2018
Author(s)
Ming Zheng, Yoona Yang, Akshaya Shankar, Thibault Aryaksama, Anand Jagota
Single wall carbon nanotubes (SWCNTs) coated with single-stranded DNA can be effectively separated into various chiralities using an aqueous two phase (ATP) system. Partitioning is driven by small differences in the dissolution characteristics of the

Perovskite Nickelates as Electric-Field Sensors in Salt Water

January 4, 2018
Author(s)
Zhen Zhang, Derek Schwanz, Badri Narayanan, Michele Kotiuga, Joseph Dura, Mathew Cherukara, Hua Zhou, John W. Freeland, Jiarui Li, Ronny Sutarto, Feizhou He, Chongzhao Wu, Jiaxin Zhu, Yifei Sun, Koushik Ramadoss, Stephen S. Nonnenmann, Nanfang Yu, Riccardo Comin, Karin M. Rabe, Subramanian K.R.S. Sankaranarayanan, Shriram Ramanathan
Although oceans comprise over seventy percent of our planet, they are among the least understood ecosystems. Complex three-dimensional marine environments hold important clues into long term effects of climate change, evolutionary consequences, and animal

Self-assembled Layering of Magnetic Nanoparticles in a Ferrofluid onSilicon Surfaces

January 4, 2018
Author(s)
Katharina Theis-Brohl, Erika C. Vreeland, Andrew Gomez, Dale L. Huber, Apurve Saini, Max Wolff, Brian B. Maranville, Erik Brok, Kathryn L. Krycka, Joseph Dura, Julie Borchers
This article describes the 3D self-assembly of monodisperse colloidal magnetite nanoparticles from a dilute water-based ferrofluid onto a silicon surface and the dependence of the resultant magnetic structure with applied field. The nanoparticles assemble

Rheological Properties of Jute-Based Cellulose Nanofibers under Different Ionic Conditions

January 1, 2018
Author(s)
Lihong Geng, Ali Naderi, Yimin NMN Mao, Chengbo Zhan, Priyanka Sharma, Xiangfang Peng, Benjamin S. Hsiao
Cellulose nanofibers (CNF) were produced by 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) -oxidation and mechanical shearing of jute pulp. The cross section dimension of CNFs was determined by small-angle neuron scattering (SANS), yielding a width of about

The enigmatic vitrification at the ancient hillfort Broborg and its utilization as an analogue for nuclear waste glass.

January 1, 2018
Author(s)
Jamie L. Weaver, Rolf Sjoblom, Eva Hjarthner-Holdar, Carolyn Pearce, Erik Ogenhall, Mia Englund, John McCloy, David Peeler, Albert Kruger
Although the modern understanding of chemistry dates back only around 300 years, many of the processes and products used today were actually originally developed by ancient people. However, much of such ancient knowledge has been lost, as is the case for

Order-Disorder Transitions and Superionic Conductivity in the Sodium Nido-Undeca(carba)borates

December 26, 2017
Author(s)
Wan Si NMN Tang, Mirjana NMN Dimitrievska, Vitalie Stavila, Wei Zhou, Hui Wu, A. Alec Talin, Terrence J. Udovic
The salt compounds NaB 11H 14, Na-7-CB 10H 13, Li-7-CB 10H 13, Na-7,8-Cd2^B 9H 12, and Na-7,9-C 2B 9H 12 all contain geometrically similar, monocharged, nido-undeca(carba)borate anions (i.e., truncated icosohedral-shaped clusters constructed of only eleven

An Ideal Molecular Sieve for Acetylene Removal from Ethylene with Record Selectivity and Productivity

December 20, 2017
Author(s)
Bin Li, Xili Cui, Dan O'Nolan, Hui-Min Wen, Mengdie Jiang, Rajamani Krishna, Hui Wu, Rui-Biao Lin, Yu-Sheng Chen, Daqiang Yuan, Huabin Xing, Wei Zhou, Qilong Ren, Guodong Qian, Michael J. Zaworotko, Banglin Chen
Realization of ideal molecular sieves, in which the larger gas molecules are completely blocked without sacrificing high adsorption capacities of the preferred smaller gas molecules, can significantly reduce energy costs for gas separation and purification

New Insights into the Flow and Microstructural Relaxation Behavior of Biphasic Cellulose Nanocrystal Dispersions from RheoSANS

December 7, 2017
Author(s)
Alexander D. Haywood, Kathleen Weigandt, Partha Saha, Matthew Noor, Micha J. Green, Virginia A. Davis
Understanding microstructure and shear response is a prerequisite for the controlled and predictable assembly of anisotropic nanomaterials into large area structures. Much of the framework for understanding the rheological behavior of lyotropic dispersions

Nanoscale Particle Motion in Attractive Polymer Nanocomposites

December 6, 2017
Author(s)
Erkan NMN Senses, Suresh Narayanan, Yimin NMN Mao, Antonio Faraone
Using x-ray photon correlation spectroscopy, we examined slow nanoscale motion of silica nanoparticles individually dispersed in entangled poly (ethylene oxide) melt at particle volume fractions up to 42%. The nanoparticles, therefore, serve as both

Role of Materials Science in the Resilience of the Built Environment

December 5, 2017
Author(s)
Stephanie S. Watson, Chiara C. Ferraris, Jason D. Averill
The resilience of U.S. communities, defined as the "ability to withstand and recover rapidly from disruptive events," is directly dependent upon the ability of the built environment to maintain and support the functions upon which modern society has come

Assessment of PGAA capability for low-level measurements of H in Ti alloy

December 1, 2017
Author(s)
Danyal J. Turkoglu, Huaiyu H. Chen-Mayer, Rick L. Paul, Rolf L. Zeisler
The accuracy of low-level hydrogen measurements with prompt gamma-ray activation analysis (PGAA) depends on identifying and accounting for all background H signal, including interfering signals. At the cold-neutron (CN)PGAA facility at the NIST Center for

Clustering and Percolation in Suspensions of Carbon Black

November 22, 2017
Author(s)
Jeffrey J Richards, Julie Beth Hipp, John K Riley, Norman J. Wagner, Paul Butler
High-structured carbon fillers are ubiquitous as the conductive additive comprising suspension-based electrochemical storage technologies. Carbon black networks provide the necessary electric conductivity as well as mechanical percolation in the form of a

String-like Collective Motion and Diffusion in the Interfacial Region of Ice

November 20, 2017
Author(s)
Jack F. Douglas, Hao Zhang, Xuhang Tong, Xinyi Wang
We investigate the collective molecular motions and diffusion of water molecules in the mobile interfacial region of the secondary prismatic plane of hexagonal ice by molecular dynamics simulation based on the TIP4P/2005 water potential and metrologies of

Sketchnote summary of "The Backscattering Story: A Personal View"

November 16, 2017
Author(s)
Robert M. Dimeo
In August 2014, Dr. Anton Heidemann published a short, personal history of the development of neutron backscattering. His fascinating article 1 described the technical innovations that were made during the development of this technique, and it is
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