A5056818001- Radioactive element chemistry and processing
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Nuclear materials and radiation effects
- Geochemistry and Geologic Mapping
- Radioactivity and Radon Measurements
- Integrated Circuits and Semiconductor Failure Analysis
- Geological formations and processes
- Scientific Computing and Data Management
- Mine drainage and remediation techniques
- Geology and Paleoclimatology Research
- Coral and Marine Ecosystems Studies
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Iron oxide chemistry and applications
- NMR spectroscopy and applications
- Polymer crystallization and properties
- Crystallography and Radiation Phenomena
- Computational Physics and Python Applications
- Research Data Management Practices
- Geophysical Methods and Applications
- Topological Materials and Phenomena
- Electronic and Structural Properties of Oxides
- Architecture and Computational Design
- Advanced X-ray and CT Imaging
Johns Hopkins University
2002-2024
Indiana University Bloomington
2006
Pacific Northwest National Laboratory
2006
Battelle
2006
Towson University
2001
University of Guam
2001
National Aquarium
2001
Middlebury College
1991
Asbury University
1910
Indiana State University
1910
Graphical abstract
Abstract Climate Change and Materials Criticality challenges are driving urgent responses from global governments. These drive policy to achieve sustainable, resilient, clean solutions with Advanced (AdMats) for industrial supply chains economic prosperity. The research landscape comprising industry, academe, government identified a critical path accelerate the Green Transition far beyond slow conventional through Digital Technologies that harness Artificial Intelligence, Smart Automation...
The foundation of marine coral reef ecosystems is calcium carbonate accumulated primarily by the action hard corals (Coelenterata: Anthozoa: Scleractinia). Colonial polyps cover surface and deposit as aragonite polymorph, stabilized into a continuous calcareous skeleton. Scleractinian skeleton composition architecture are well documented; however, cellular mechanisms calcification poorly understood. There little information on nature cell types involved or their cooperation in...
Characterization of composition and structure is crucial to understanding the properties performance nanomaterials. For nanowires nanotubes, determining radial compositional structural modulations particularly challenging. Here we use a focused ion beam (FIB) lift-out technique show that Cu−Ni core/shell fabricated by template synthesis are characterized large, high purity (>99 atom %) copper grains surrounded much smaller, nickel grains.
The role of the interlayer region three different FeII-poor micas (2.8, ∼0.02, and 0.01 FeII atom %) in reduction UVI was investigated at pH ∼4.3, low ionic strength, 23 °C under both anoxic aerated conditions batch reactors for 1 to 10 days. U diffusion profiles were mapped with X-ray microscopy, oxidation state tracked XANES as a function distance from crystal edge. Peak concentrations only reached about 0.006−0.0002 percent, where full-width-at-half-maximums fronts roughly 25−50 μm....
Two samples of uranium-contaminated soil from the Department Energy's Oak Ridge Reservation in Ridge, Tennessee were investigated using electron microprobe analysis and transmission microscopy. The objectives this research to identify characterize particles rock chips with high uranium concentrations, investigate extent penetration into parent material, solid-phase hosts for samples. Three distinct have been identified: (1) iron oxyhydroxides, including goethite ferrihydrite; (2) mixed Mn−Fe...
Abstract This study aims to establish a systematic approach for characterizing recycled polyolefins of unknown composition, with specific focus on predicting their performance in film extrusion. We explore various characterization techniques, including differential scanning calorimetry (DSC), Fourier‐transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and rheometry assess effectiveness identifying the polyethylene (PE) fractions within polypropylene (PP) recyclates. By...
The relationship between diffraction contrast and electron energy loss was investigated by obtaining energy-filtering transmission microscope images of a bend contour in aluminum 100 eV increments from 0 to 1000 eV. Results show that: (i) the is an exponentially decaying function which becomes approximately zero at under experimental conditions employed, (ii) there large influence on energy-filtered (EFI), particularly jump-ratio images, out several hundred loss, (iii) while blurring EFI due...
This article presents the first use of shape forming elements (SFEs) to produce architected composites from multiple materials in an extrusion process. Each SFE contains a matrix flow channels connecting input and output ports, where are routed between corresponding ports. The mathematical operations rotation shifting described, design automation is explored using Bayesian optimization genetic algorithms select fifty or more parameters for minimizing two objective functions. aims match...
The metatorbernite [Cu(UO2)2(PO4)2·8H2O] structure comprises autunite-type sheets of cornersharing uranyl square bipyramids and phosphate tetrahedra, with the interlayer region occupied by Cu2+ ions molecular water. Previous studies have shown that heating induces stepwise dehydration reduction in basal spacing. Structures lower hydrates not been determined previously because suitable single crystals these phases yet to be prepared.
Early exposure cap microdolomites (<50 °C) and low-temperature hydrothermal (<177 calcian dolomite crystals from the Latemar buildup, Dolomites, northern Italy, are microstructurally heterogeneous. Selected-area electron-diffraction patterns contain incommensurate superstructure reflections domains that approximately 2.5 nm wide. These quasiperiodic with wavelengths of 5 to 20 nm. The scale these modulations varies composition bulk crystal.
It is demonstrated that energy-filtered transmission electron microscope (EFTEM) imaging in a conventional TEM (CTEM), equipped with field-emission gun (FEG) source, can be used to characterize the local chemical distribution exsolved pyroxenes. EFTEM imaging, which performed one tens of minutes, yields two-dimensional compositional maps have nanometer- scale resolution. The combination energy-loss spectroscopy (EELS) and techniques such as bright-field dark-field high-resolution (HRTEM)...
Smart materials usually are either mounted on surfaces or embedded inside; in this work, we study magnetic properties of smart that integrated into the structure. Magnetostrictive particles TbxDy1−xFe2 (x ∼ 0.3), commonly known as Terfenol-D, incorporated carbon fiber reinforced polymers showed a 3000% enhancement coercive field compared to reference pristine bulk Terfenol-D. Torque magnetometer measurements revealed anisotropy with twofold symmetry. The lowest applied at which reversible...
Eminizer et al., (2023). OpenMSIStream: A Python package for facilitating integration of streaming data in diverse laboratory environments. Journal Open Source Software, 8(83), 4896, https://doi.org/10.21105/joss.04896