A5049743322- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Hydrocarbon exploration and reservoir analysis
- Fusion materials and technologies
- Radiation Detection and Scintillator Technologies
- High-pressure geophysics and materials
- Nuclear reactor physics and engineering
- Radioactive element chemistry and processing
- Quantum, superfluid, helium dynamics
- High Temperature Alloys and Creep
- Advanced Materials Characterization Techniques
- Surfactants and Colloidal Systems
- Hydraulic Fracturing and Reservoir Analysis
- Microstructure and Mechanical Properties of Steels
- Rare-earth and actinide compounds
- NMR spectroscopy and applications
- Lipid Membrane Structure and Behavior
- Magnetic Properties of Alloys
- Geological and Geochemical Analysis
- Advanced Polymer Synthesis and Characterization
- Iron-based superconductors research
- Chemical and Physical Properties in Aqueous Solutions
- Atmospheric and Environmental Gas Dynamics
- Metallurgical Processes and Thermodynamics
Oak Ridge National Laboratory
2015-2024
Government of the United States of America
2022
Oak Ridge Associated Universities
2016-2018
Alfred University
2018
Massanutten Regional Library
2018
Forschungszentrum Jülich
2018
City University of Hong Kong
2018
Weatherford College
2016
National Taiwan University
2009
Massachusetts Institute of Technology
2009
We find the value of lignin for biomass processing industries via conversion to 3D-printable resin and its sustainable composites.
Bionanoparticles, such as the cowpea mosaic virus, can stabilize oil droplets in aqueous solutions by self-assembly at liquid interfaces. Subsequent cross-linking of bionanoparticles transforms assemblies into robust membranes that have covalent inter-bionanoparticle connections. The resulting are nanoscopically thin sheets (see SANS image (SANS=small-angle neutron scattering)), which were examined fluorescent labeling.
Oak Ridge National Laboratory is home to the High Flux Isotope Reactor (HFIR), a high-flux research reactor, and Spallation Neutron Source (SNS), world's most intense source of pulsed neutron beams. The unique co-localization these two sources provided an opportunity develop suite complementary small-angle scattering instruments for studies large-scale structures: GP-SANS Bio-SANS at HFIR EQ-SANS TOF-USANS SNS. This article provides overview capabilities instruments, with specific emphasis...
Small angle neutron scattering (SANS) and scanning transmission electron microscopy (STEM) were used to study film formation by magnesium alloys AZ31B (Mg-3Al-1Zn base) ZE10A (Elektron 717, E717: Mg-1Zn + Nd, Zr) in H2O D2O with without 1 or 5 wt% NaCl. No SANS changes observed after 24 h exposures compared as-received (unreacted) alloy, consistent relatively dense MgO-base formation. However, exposure NaCl resulted accelerated corrosion, resultant detected. The data indicated both particle...
Small-angle neutron scattering (SANS) is a powerful tool for characterizing complex disordered materials, including biological materials. The Bio-SANS instrument of the High Flux Isotope Reactor Oak Ridge National Laboratory (ORNL) high-flux low-background SANS that is, uniquely among instruments, dedicated to serving needs structural biology and biomaterials communities as an open-access user facility. Here, technical specifications performance are presented. Sample environments developed...
Data reduction is a critical step in small-angle neutron scattering experiment. It corrects the data for instrument-specific artefacts, making it ready analysis, interpretation, as well comparison against collected with different instruments. Here, drtsans software package developed at Oak Ridge National Laboratory EQ-SANS, GP-SANS, and Bio-SANS instruments, which are located Spallation Neutron Source High Flux Isotope Reactor, described. The rigorous development methods employed have...
An efficient approach to the syntheses of amphiphilic rod−coil diblock and coil−rod−coil triblock copolymers was developed. Each copolymer consists a perfectly monodispersed oligo(phenylene vinylene) covalently bonded poly(ethylene glycol) block with very low polydispersity (<1.05). The structure basic physical properties these were characterized by various spectroscopic techniques such as NMR, MALDI-TOF, GPC, DSC, UV/vis, fluorescence study. These shown possess remarkable self-assembling...
Abstract In this work, the system U(VI), HNO3–tri‐n‐butylphosphate (TBP), n‐dodecane has been revisited with objective of gaining information on coordination chemistry and structural evolution species formed in organic phase before after third formation. Chemical analyses, spectroscopic EXAFS data indicate that U(VI) is extracted as UO2(NO3)2·2TBP adduct, while have average composition UO2(NO3)2·2TBP·HNO3. Small‐angle neutron scattering (SANS) measurements TBP solutions loaded only HNO3 or...
A series of upgrades have been undertaken at the High Flux Isotope Reactor (HFIR) Oak Ridge National Laboratory, including installation a supercritical hydrogen moderator ( T ≃ 20 K), which has boosted flux long-wavelength neutrons by over two orders magnitude. In order to take advantage new capabilities, 40 m-long small-angle neutron scattering (SANS) instrument constructed, utilizes mechanical velocity selector, pinhole collimation and high-count-rate (>10 5 Hz) large-area (1 m 2 )...
A systematic series of 16 amphiphilic bottlebrush block copolymers (BCPs) containing polystyrene and poly(N-acryloylmorpholine) (PACMO) side chains were prepared by a combination atom-transfer radical polymerization (ATRP), photoiniferter polymerization, ring-opening metathesis (ROMP). The grafting-through method used to prepare the polymers enabled high degree control over backbone side-chain molar masses for each block. Surface tension measurements on self-assembled BCPs in water revealed...
We created Immense Surface Area Carbons (ISACs) by a novel heat treatment that stabilized the micelle structure in biological based precursor prior to high temperature combined activation – pyrolysis.
One of the significant successes in field neutron interferometry has been experimental observation phase shift a de Broglie wave due to action Earth's gravitational field. Past experiments have clearly demonstrated effect and verified quantum-mechanical equivalence inertial masses precision about 1%. In this experiment gravitationally induced is measured with statistical uncertainty order 1 part 1000 two different interferometers. Nearly harmonic pairs wavelengths are used measure compensate...
We apply synchrotron-based small-angle X-ray scattering to investigate the relationship between compaction, metal binding, and structure formation of two RNAs at 37 °C: 76 nucleotide yeast tRNAPhe 255 catalytic domain Bacillus subtilis RNase P RNA. For both RNAs, this method provides direct evidence for population a distinct folding intermediate. The relative compaction intermediate native state does not correlate with size RNA but well amount surface burial as quantified previously by...
Small-angle neutron scattering (SANS) data for the tri-n-butyl phosphate (TBP)−n-dodecane, HNO3−UO2(NO3)2 solvent extraction system have been interpreted using Baxter model hard spheres with surface adhesion. The increase in intensity low Q range observed when increasing amounts of HNO3 or UO2(NO3)2 are transferred into organic phase has as arising from interactions between solute particles. SANS reproduced a 12−16 Å diameter sphere, dhs, and 5.6kBT−7.1kBT stickiness parameter, τ-1. When...