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Ultra-Small Angle X-ray Scattering Instrument at the Advanced Photon Source, History, Recent Development, and Current Status

January 1, 2013

Author(s)

Andrew J. Allen, Fan Zhang, Lyle E. Levine, Gabrielle G. Long, Jan Ilavsky, Pete R. Jemian

The history and development over more than 25 years is presented and discussed of an ultra-small-angle X-ray scattering (USAXS) instrument dedicated to serving a broad range of materials research needs. This history is traced from the instruments origins

High-energy Ultra-Small Angle X-ray Scattering Instrument at the Advanced Photon Source

December 1, 2012

Author(s)

Andrew J. Allen, Lyle E. Levine, Fan Zhang, Gabrielle G. Long, Jan Ilavsky, Pete R. Jemian

This paper reports recent tests performed on the Bonse-Hart-type ultra-small angle X-ray scattering (USAXS) instrument at the Advanced Photon Source with higher-order reflection optics Si (440) instead of Si (220) and with X-ray energies greater than

Characterization of a SI-Traceable Vacuum-Compatible Precision Nanoindentation Platform

October 22, 2012

Author(s)

Bartosz K. Nowakowski, Douglas T. Smith, Stuart Smith

This paper discusses the ongoing development of a vacuum-compatible, precision nano-indentation platform (PNP) that is directly traceable to Système International d'Unités (SI). In particular, results from recent initiatives to address environmental

In situ SAXS and SANS Measurements to Overcome Materials Technology Barriers

October 17, 2012

Author(s)

Andrew J. Allen

For over 50 years microstructure characterization by small-angle X-ray and neutron scattering (SAXS and SANS) has successfully addressed challenges and surmounted technical barriers impeding the development and application of technological materials. These

First-principles studies of the atomic, electronic and magnetic structure of alpha-MnO2 (cryptomelane)

July 4, 2012

Author(s)

Eric J. Cockayne, Lan (. Li

First-principles density functional theory calculations are used to investigate alpha-MnO2, a structure containing a framework of corner and edge sharing MnO6 octahedra with tunnels in between. Calculations show that placing additional species, such as K+

Synthesis and characterization of model crosslinked polyamide films for water purification

June 24, 2012

Author(s)

Peter M. Johnson, Edwin Chan, Jun Y. Chung, Junghyun Lee, Christopher Stafford

Reverse osmosis (RO) and nanofiltration (NF) membranes are comprised of a dense active layer supported by a porous support. Commercial active layer are highly crosslinked polyamides that are formed through interfacial polymerization directly on the support

Elastic and Viscoelastic Properties of Calcium Silicate Hydrate

May 15, 2012

Author(s)

Zachary Grasley, Jones Christopher, X Li, Edward Garboczi, Jeffrey W. Bullard

In order to effectively predict the mechanical properties of concrete and other cementitious materials, it is useful to understand the properties and deformation mechanisms on the nano-metric length scale. Through a combined analytical, experimental, and

Materials Challenges in Carbon Mitigation Technologies

April 24, 2012

Author(s)

Laura Espinal, Bryan D. Morreale

Thermochemical conversion of fossil fuels currently dominates the national and global energy portfolio, with the most notable being the stationary power production and transportation vehicles sectors. As global energy demand continues to increase

Nano-Apatitic Composite Scaffolds for Stem Cell Delivery and Bone Tissue Engineering

April 15, 2012

Author(s)

Hockin H. Xu, Carl Simon Jr.

The need for bone defect repair and regeneration arises from trauma, disease, congenital deformity, and tumor resection. Bone fracture occurs to seven million people each year in the United States, and musculoskeletal conditions cost $215 billion annually

Time dependent CO2 sorption hysteresis in a one-dimensional microporous octahedral molecular sieve

April 6, 2012

Author(s)

Laura Espinal, Winnie K. Wong-Ng, Andrew J. Allen, Daniel W. Siderius, Chad R. Snyder, Eric J. Cockayne, Lan (. Li, James A. Kaduk, Anais E. Espinal, Steven L. Suib, Chun Chiu

A critical challenge in the development of novel carbon capture materials with engineered porous architectures is to understand and control the phenomenon of sorption hysteresis, whereby the path to adsorption of gas molecules by the porous host differs

Ultra-small-Angle X-ray Scattering - X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites

February 28, 2012

Author(s)

Fan Zhang, Andrew Allen, Lyle E. Levine, Laura Espinal, Joseph M. Antonucci, Drago Skrtic, Justin N. O'Donnell, Jan Ilavsky

The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon heating using both static, bulk measurement techniques and recently developed ultra-small angle X-ray scattering - X-ray photon correlation

Rippling Instability of Supported Polymer Nanolines

February 21, 2012

Author(s)

Vijaya R. Tirumala, Christopher M. Stafford, Leonidas E. Ocola, Jack F. Douglas, L. Mahadevan

The swelling response of polymer line gratings supported on a rigid substrate has direct implications on their mechanical stability during pattern transfer in nanofabrication. The polymer lines, when swollen in a good solvent, undergo a rippling

Quantification of ligand packing density on gold nanoparticles using ICP-OES

February 18, 2012

Author(s)

Sherrie R. Elzey, De-Hao D. Tsai, Savelas A. Rabb, Lee L. Yu, Michael R. Winchester, Vincent A. Hackley

In this study, a prototypical thiolated organic ligand, 3-mercaptopropionic acid (MPA), was conjugated on gold nanoparticles (AuNPs), and packing density was measured on an ensemble-averaged basis using inductively coupled plasma optical emission

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