A5025713069- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Laser-Matter Interactions and Applications
- Electrocatalysts for Energy Conversion
- Laser-Plasma Interactions and Diagnostics
- Advancements in Photolithography Techniques
- Advanced Fluorescence Microscopy Techniques
- Catalytic Processes in Materials Science
- Integrated Circuits and Semiconductor Failure Analysis
- Optical measurement and interference techniques
- Inhalation and Respiratory Drug Delivery
- Gas Sensing Nanomaterials and Sensors
- Spectroscopy Techniques in Biomedical and Chemical Research
- High Entropy Alloys Studies
- Electrochemical Analysis and Applications
- Soil erosion and sediment transport
- Advanced battery technologies research
- Botulinum Toxin and Related Neurological Disorders
- Nanomaterials and Printing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Optical Coherence Tomography Applications
- Ferroelectric and Negative Capacitance Devices
- Dielectric materials and actuators
- Rural development and sustainability
Northwest Institute For Non-Ferrous Metal Research
2019-2024
National Institute of Standards and Technology
2018
Joint Institute for Laboratory Astrophysics
2011-2017
University of Colorado Boulder
2012-2017
KLA (United States)
2017
Carl Zeiss (United States)
2016
TU Wien
2011
Yunnan University of Finance And Economics
2010
State Key Laboratory of Genetic Engineering
2005
Fudan University
2005
Using a simple model of strong-field ionization atoms that generalizes the well-known 3-step from 1D to 3D, we show experimental photoelectron angular distributions resulting laser xenon and argon display prominent structures correspond electrons pass by their parent ion more than once before strongly scattering. The shape these can be associated with specific number times electron is driven past its in field Furthermore, careful analysis cutoff energy allows us experimentally measure...
We demonstrate the first (to our knowledge) general purpose full-field reflection-mode extreme ultraviolet (EUV) microscope based on coherent diffractive imaging. This is capable of nanoscale amplitude and phase imaging extended surfaces at an arbitrary angle incidence in a noncontact, nondestructive manner. use light 29.5 nm from high-harmonic upconversion to illuminate surface, directly recording scatter as surface scanned. Ptychographic reconstruction then combined with tilted plane...
Scanning electron microscopy and atomic force are well-established techniques for imaging surfaces with nanometer resolution. Here we demonstrate a complementary powerful approach based on tabletop extreme-ultraviolet ptychography that enables quantitative full field higher contrast than other techniques, compositional topographical information. Using high numerical aperture reflection-mode microscope illuminated by 30 nm harmonic source, retrieve quality, contrast, images 40 80 lateral...
Pt-based high-entropy-alloy nanoparticles (HEA-NPs) have excellent physical and chemical properties due to the diversity of composition, complexity surface structure, high mixing entropy, nanoscale, they are used in a wide range catalytic applications such as ammoxidation, electrolysis water produce hydrogen, CO2/CO reduction, ethanol/methanol oxidation reaction. However, offering facile, low-cost, large-scale method for preparing HEA-NPs still faces great challenges. In this study, we...
We extend coherent diffraction imaging (CDI) to a high numerical aperture reflection mode geometry for the first time. derive coordinate transform that allows us rewrite recorded far-field scatter pattern from tilted object as uniformly spaced Fourier transform. Using this approach, FFTs in standard iterative phase retrieval algorithms can be used significantly speed up image reconstruction times. Moreover, we avoid isolated sample requirement by pinhole onto specimen, technique termed...
Nanoscale tungsten (W) powder is used in some special materials. In this study, a hollow superstructure W consisting of nanoparticles was synthesized by spray drying combined with two-step calcination from commercial (NH4)6W7O24·6H2O. The high-pressure gas (HPG) the significant factor process, which affect BET surface area and average particles size spray-dried powders. detailed influences calcined steps temperature microstructure final were investigated. distribution as-synthesized...
PSD-93/chapsin-110 is a neuronal PDZ domain-containing protein that binds to and clusters the N-methyl-D-aspartate receptor (NMDAR) at synapses in central nervous system. It also assembles specific set of signaling proteins around NMDAR mediates downstream by NMDAR. Thus, might be involved many physiological pathophysiological actions triggered via activation In current study, we report abundant was detected rat spinal cord, particularly superficial dorsal horn. The rats injected...
We demonstrate the first general tabletop EUV coherent microscope that can image extended, non-isolated, non-periodic, objects. By implementing keyhole diffractive imaging with curved mirrors and a high harmonic source, we achieve improved efficiency of system as well more uniform illumination at sample, when compared what is possible using Fresnel zone plates. Moreover, show unscattered light from semi-transparent sample be used holographic reference wave, allowing quantitative information...
A facile, adjustable, and expandable synthetic technique to make three-dimensional (3D)-nanoframework nanomaterials with super-large surface areas is of great significance in the field electrocatalysts. In this study, spray-drying combined thermal decomposition reduction employed synthesize single-metal Pt, Pt-based multimetallic, high-entropy alloy (HEA) 3D-nanoframeworks under mild conditions (at 300 °C a H2 atmosphere). It found that as-synthesized Pt 3D-nanoframework shows 94.9 m2/g...
Abstract We report 3D coherent diffractive imaging (CDI) of Au/Pd core-shell nanoparticles with 6.1 nm spatial resolution elemental specificity. measured single-shot diffraction patterns the using intense x-ray free electron laser pulses. By exploiting curvature Ewald sphere and symmetry nanoparticle, we reconstructed density 34 structures from these patterns. To extract structural information beyond signal, implemented a super-resolution technique by taking advantage CDI’s quantitative...
We investigated insertion (Ins)/deletion(Del) polymorphism in alpha-2-macroglobulin (A2M), G/C variant the beta-site amyloid precursor protein-cleaving enzyme 1 (BACE1) and apolipoprotein E (APOE) gene epsilon2/epsilon3/epsilon4 387 Chinese Han ethnic patients with Alzheimer's disease healthy study participants. After stratification for APOEepsilon4 status, only BACE1-G allele was significantly associated disease. Through meta-analysis of Del or G by pooling Asian studies, appeared to...
Design and fabrication of a non-Pt hydrogen evolution catalyst for acidic alkaline solutions are paramount significance water splitting. Herein, we proposed method through spray-drying coupling high-temperature reduction, which had simple, efficient, wide-scale applications compared with the traditional synthetic process, RuCo NPs/CNTs was fabricated successfully. Zero-dimensional (0D) nanoparticles (<10 nm) embedded on one-dimensional (1D) CNTs uniformly involving each other could offer...
The search for suitable synthesis methods and parameters capable of controlling the length, diameter, yield silver nanowires (AgNWs) is still an emerging strategy today. Therefore, a method high-yield long AgNWs via chromic chloride stable reaction environment was proposed. results show that Cr 3+ could restore adsorbed atomic oxygen quickly provide high efficiency in prevention oxidative etching, ion 2+ oxidized to has lower standard electrode potential, more provided by coupling avoid...
Coherent diffraction imaging (CDI) has matured into a versatile phase-contrast microscopy technique capable of producing limited images without the need for high precision focusing elements. CDI been most appropriately applied in EUV/X-ray region spectrum where optics are both difficult to produce and inefficient. By satisfying basic geometric constraints (such as Nyquist sampling scattered intensities) techniques essentially replace any elements with sophisticated computer algorithms. We...
Coherent diffractive imaging (CDI) using EUV/X-rays has proven to be a powerful microscopy method for nanoscale objects. In traditional CDI, the oversampling condition limits its applicability small, isolated A new technique called keyhole CDI was demonstrated on synchrotron X-ray source circumvent this limitation. Here we demonstrate first result with tabletop extreme ultraviolet (EUV) source. The EUV is based high harmonic generation (HHG), and our modified form of uses highly reflective...
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Abstract The synthesis of superfine silver powder with good dispersity is great significance for accelerating the development high‐end electronics and photovoltaic products. Herein, a kind quasi‐spherical submicron prepared by introduction gelatin during ions reduction reported. optimal scheme determined that initial pH solution 3 mass ( M w 50,000—70,000) 10% nitrate, leading to mono‐disperse regular morphology average particle size 0.5 µm. In addition, can be further combined...
We implement coherent diffractive imaging (CDI) using a phase-matched high-harmonic generation (HHG) source at 13 nm, demonstrating reconstructed images with record 22 nm resolution for any tabletop, light-based microscope. also demonstrate the first reflection-mode CDI compact extreme ultraviolet (EUV) source, achieving ≈100 resolution. A clear path towards even higher spatial tabletop apertured-illumination schemes will be discussed.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. D. Seaberg, E. Adams, B. Zhang, Murnane, and H. C. Kapteyn, "Tabletop Reflection Mode Coherent Diffractive Imaging of Periodic Nano-Structures 100 nm Resolution," in Conference Lasers Electro-Optics 2012, OSA Technical Digest (online) (Optica Publishing Group, 2012), paper CF1L.8. Export BibTex Endnote (RIS) HTML Plain alert Save article