A5046950240- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Polymer Foaming and Composites
- Cellular and Composite Structures
- Machine Learning in Materials Science
- Advanced X-ray Imaging Techniques
- Electronic and Structural Properties of Oxides
- Mechanical Behavior of Composites
- X-ray Diffraction in Crystallography
- Integrated Circuits and Semiconductor Failure Analysis
- Polymer composites and self-healing
- Advancements in Photolithography Techniques
- Ion-surface interactions and analysis
- Fiber-reinforced polymer composites
- Semiconductor materials and devices
- Microstructure and mechanical properties
- Advanced Materials Characterization Techniques
- Polymer crystallization and properties
- Perovskite Materials and Applications
- High Entropy Alloys Studies
- Luminescence Properties of Advanced Materials
- Additive Manufacturing Materials and Processes
- Force Microscopy Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Fluorescence Microscopy Techniques
Cornell University
2023-2025
University of California, Berkeley
2019-2025
Interface (United States)
2023-2025
Lawrence Berkeley National Laboratory
2020-2025
Interface (United Kingdom)
2025
PARADIM
2025
Materials Science & Engineering
2024
New York University
2013-2020
SUNY Polytechnic Institute
2014-2015
Corrosion is a ubiquitous failure mode of materials. Often, the progression localized corrosion accompanied by evolution porosity in materials previously reported to be either three-dimensional or two-dimensional. However, using new tools and analysis techniques, we have realized that more form corrosion, which call 1D wormhole has been miscategorized some situations. Using electron tomography, show multiple examples this percolating morphology. To understand origin mechanism Ni-Cr alloy...
ConspectusScanning electron nanobeam diffraction, or 4D-STEM (four-dimensional scanning transmission microscopy), is a flexible and powerful approach to elucidate structure from "soft" materials that are challenging image in the microscope because their easily damaged by beam. In experiment, converged beam scanned across sample, pixelated camera records diffraction pattern at each scan position. This four-dimensional data set can be mined for various analyses, producing maps of local crystal...
Scanning transmission electron microscopy (STEM) allows for imaging, diffraction, and spectroscopy of materials on length scales ranging from microns to atoms. By using a high-speed, direct detector, it is now possible record full 2D image the diffracted beam at each probe position, typically grid positions. These 4D-STEM datasets are rich in information, including signatures local structure, orientation, deformation, electromagnetic fields other sample-dependent properties. However,...
Crystalline materials used in technological applications are often complex assemblies composed of multiple phases and differently oriented grains. Robust identification the orientation relationships from these samples is crucial, but information extracted diffraction condition probed by an electron beam incomplete. We therefore have developed automated crystal mapping (ACOM) procedure which uses a converged probe to collect patterns locations across sample. provide algorithm determine each...
ABSTRACT The influence of cenosphere surface treatment and blending method on the properties injection molded high‐density polyethylene (HDPE) matrix syntactic foams is investigated. Cenospheres are treated with silane HDPE functionalized dibutyl maleate. Tensile test specimens cast 20, 40, 60 wt % cenospheres using molding. Modulus strength found to increase increasing content for composites constituents. Highest modulus were observed 40 untreated mechanically mixed brabender...
Abstract A fast, robust pipeline for strain mapping of crystalline materials is important many technological applications. Scanning electron nanodiffraction allows us to calculate maps with high accuracy and spatial resolutions, but this technique limited when the beam undergoes multiple scattering. Deep-learning methods have potential invert these complex signals, require a large number training examples. We implement Fourier space, complex-valued deep-neural network, FCU-Net, highly...
Abstract Cryo-EM is a powerful tool in structural biology, providing insights through techniques like single-particle analysis (SPA) and cryogenic electron tomography (cryo-ET). In thick specimens, challenges arise as an exponentially larger fraction of the transmitted electrons lose energy from inelastic scattering can no longer be properly focused result chromatic aberrations post-specimen optics. Rather than filtering out at price reducing potential signal, done energy-filtered...
Abstract We describe the development, operation, and application of 4D Camera—a 576 by pixel active sensor for scanning/transmission electron microscopy which operates at 87,000 Hz. The detector generates data ∼480 Gbit/s is captured dedicated receiver computers with a parallelized software infrastructure that has been implemented to process resulting 10–700 Gigabyte-sized raw datasets. back illuminated provides ability detect single events accelerating voltages from 30 300 kV. Through...
Targeted alpha therapy, where highly cytotoxic doses are delivered to tumor cells while sparing surrounding healthy tissue, has emerged as a promising treatment against cancer. Radionuclide conjugation with targeting vectors and dose confinement, however, still limiting factors for the widespread application of this therapy. In current study, we developed multifunctional silica nanoconstructs targeted therapy that show capabilities breast cancer cells, responses at therapeutic dosages,...
<title>Abstract</title> Cryo-EM is a powerful tool in structural biology, providing insights through techniques like single-particle analysis (SPA) and cryogenic electron tomography (cryo-ET). In thick specimens, challenges arise as an exponentially larger fraction of the transmitted electrons lose energy from inelastic scattering can no longer be properly focused result chromatic aberrations post-specimen optics. Rather than filtering out at price reducing potential signal, done...
The data set presented is related to the tensile behavior of cenosphere reinforced high density polyethylene syntactic foam composites "Processing cenosphere/HDPE foams using an industrial scale polymer injection molding machine" (Bharath et al., 2016) [1]. focus work on determining feasibility (PIM) machine for fabricating foams. fabricated are investigated microstructure and properties. in this article optimization PIM process manufacture, equations procedures develop theoretical estimates...
Syntactic foams are commonly fabricated with sodalime–borosilicate glass hollow microsphere fillers, which susceptible to degradation after long-term or high temperature moisture exposure. In comparison, borosilicate particles offer higher resistance moisture, lower thermal expansion, and softening temperature. This work explores microspheres for use as fillers in syntactic studies their thermophysical properties. The coefficient of expansion over the range 35–90℃ was observed decrease from...
The octadentate hydroxypyridinone chelator 3,4,3-LI(1,2-HOPO) is a promising therapeutic agent because of its high affinity for f-block elements and noncytotoxicity at medical dosages. interaction between other biomedically relevant metals such as gold, however, has not been explored. Gold nanoparticles functionalized with chelators have demonstrated great potential in theranostics, yet thus far, no protocol that combines colloidal gold developed. Here, we characterize the solution...