A5080163617- Advanced X-ray Imaging Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Electron Microscopy Techniques and Applications
- X-ray Diffraction in Crystallography
- Electron and X-Ray Spectroscopy Techniques
- Crystallization and Solubility Studies
- Advanced X-ray and CT Imaging
- Crystallography and Radiation Phenomena
- Nanowire Synthesis and Applications
- Force Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Laser-Plasma Interactions and Diagnostics
- Integrated Circuits and Semiconductor Failure Analysis
- Advancements in Battery Materials
- Electronic and Structural Properties of Oxides
- Machine Learning in Materials Science
- Medical Imaging Techniques and Applications
- Astrophysical Phenomena and Observations
- Advancements in Photolithography Techniques
- Thin-Film Transistor Technologies
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Advanced biosensing and bioanalysis techniques
- Near-Field Optical Microscopy
- High-pressure geophysics and materials
Brookhaven National Laboratory
2016-2025
National Synchrotron Light Source II
2008-2024
Jiangsu Shengze Hospital
2023-2024
Nanjing Medical University
2023-2024
Zhengzhou University
2023
Upton Hospital
2017-2020
First Hospital of Shanxi Medical University
2019
Shanxi Medical University
2019
Argonne National Laboratory
2007-2016
Hefei University of Technology
2016
Replacing organic liquid electrolyte with inorganic solid electrolytes (SE) can potentially address the inherent safety problems in conventional rechargeable batteries. However, solid‐state batteries (SSBs) have been plagued by relatively low ionic conductivity of SEs and large charge‐transfer resistance between electrode SE. Here, a new design strategy is reported for improving SE self‐forming composite material. An optimized Na + ion conducting derived from 1+ n Zr 2 Si P 3− O 12 NASICON...
We demonstrate the advantages of imaging with ptychography scans that follow a Fermat spiral trajectory. This scan pattern provides more uniform coverage and higher overlap ratio same number points over area than presently used mesh concentric [13] patterns. Under realistically imperfect measurement conditions, numerical simulations show quality reconstructed image is improved significantly compared pattern. The result confirmed by performance enhancement experimental data, especially under...
High-nickel content cathode materials offer high energy density. However, the structural and surface instability may cause poor capacity retention thermal stability of them. To circumvent this problem, nickel concentration-gradient have been developed to enhance high-nickel materials' cycling stability. Even though promising, fundamental mechanism concentration gradient's stabilization effect remains elusive because it is inseparable from nickel's valence gradient effect. isolate understand...
Controlling the three-dimensional (3D) nanoarchitecture of inorganic materials is imperative for enabling their novel mechanical, optical, and electronic properties. Here, by exploiting DNA-programmable assembly, we establish a general approach realizing designed 3D ordered frameworks. Through templating DNA frameworks liquid- vapor-phase infiltrations, demonstrate successful nanofabrication diverse classes from metal, metal oxide semiconductor materials, as well combinations, including...
We report improved results for hard x-ray focusing using a multilayer Laue lens (MLL). have measured line focus of 16nm width with an efficiency 31% at wavelength λ=0.064nm (19.5keV) partial MLL structure outermost zone 5nm. The are in good agreement the theoretically predicted performance.
Multilayer Laue lenses are volume diffraction elements for the efficient focusing of X-rays. With a new manufacturing technique that we introduced, it is possible to fabricate sufficiently high numerical aperture (NA) achieve focal spot sizes below 10 nm. The alternating layers materials form lens must span broad range thicknesses on nanometer scale necessary X-ray deflection angles required NA. This poses challenge both accuracy deposition process and control properties, which often vary...
Multilayer Laue lens (MLL) is a new class of x-ray optics that offer great promise for achieving nanometre-level spatial resolution by focusing hard x-rays. Fabricating an MLL via thin-film deposition provides the means to achieve linear Fresnel-zone plate structure with zone widths below 1 nm, while retaining virtually limitless aspect ratio. Despite its similarity plate, exhibits categorically distinctive properties and their fabrication comes wide array challenges. This article...
The focusing performance of a multilayer Laue lens (MLL) with 43.4 μm aperture, 4 nm finest zone width and 4.2 mm focal length at 12 keV was characterized X-rays using ptychography method. reconstructed probe shows full-width-at-half-maximum (FWHM) peak size 11.2 nm. obtained X-ray wavefront excellent agreement the dynamical calculations, exhibiting aberrations less than 0.3 wave period, which ensures MLL capable producing diffraction-limited focus while offering sufficient working distance....
Abstract We report multimodal scanning hard x-ray imaging with spatial resolution approaching 10 nm and its application to contemporary studies in the field of material science. The high is achieved by focusing x-rays two crossed multilayer Laue lenses raster-scanning a sample respect nanofocusing optics. Various techniques are used characterize verify focus size resolution. realized utilizing simultaneously absorption-, phase-, fluorescence-contrast mechanisms. combination enables...
A hard X-ray scanning microscope installed at the Hard Nanoprobe beamline of National Synchrotron Light Source II has been designed, constructed and commissioned. The relies on a compact, high stiffness, low heat dissipation approach utilizes two types nanofocusing optics. It is capable imaging with ∼15 nm × 15 spatial resolution using multilayer Laue lenses 25 26 zone plates. Fluorescence, diffraction, absorption, differential phase contrast, ptychography tomography are available as...
III-As nanowires are candidates for near-infrared light emitters and detectors that can be directly integrated onto silicon. However, nanoscale to microscale variations in structure, composition, strain within a given nanowire, as well between nanowires, pose challenges correlating microstructure with device performance. In this work, we utilize coherent nanofocused X-rays characterize stacking defects single InGaAs nanowire supported on Si. By reconstructing diffraction patterns from the...
The hierarchical nature of additively manufactured materials necessitates a multimodal approach for quantifying microstructural features and corresponding chemical heterogeneities that ultimately impact their properties performance. In laser powder-bed fusion (L-PBF) 316L stainless steel, corrosion behavior has been discussed in the context formed presence these microstructures. Here, we employ suite advanced synchrotron x-ray techniques correlative transmission electron microscopy analysis...
Advances in nanoscale self-assembly have enabled the formation of complex architectures. However, development strategies toward bottom-up nanofabrication is impeded by challenges revealing these structures volumetrically at single-component level and with elemental sensitivity. Leveraging advances nano-focused hard x-rays, DNA-programmable nanoparticle assembly, inorganic templating, we demonstrate nondestructive three-dimensional imaging complexly organized nanoparticles multimaterial...
In two-dimensional (2D) chiral metal-halide perovskites (MHPs), organic spacers induce structural chirality and chiroptical properties in the sublattice. This enables reversible crystalline-glass phase transitions (S-NEA)2PbBr4, a prototypical 2D MHP where NEA+ represents 1-(1-naphthyl)ethylammonium. Here, we investigate two distinct spherulite states of exhibiting either radial-like or stripe-like banded patterns depending on annealing conditions amorphous film. Despite similarities optical...
We present a formalism of x-ray dynamical diffraction from volume diffractive optics with large numerical aperture and high aspect ratio, in an analogy to the Takagi-Taupin equations [Acta Crystallogr. 15, 1311 (1962); Bull. Soc. Fr. Mineral. 87, 469 (1964)] for strained single crystals. derive set basic optics, which enable us study focusing property these various grating profiles. that satisfy Bragg condition degrees, namely, flat, tilted, wedged geometries, curved geometries required...
Hard x-ray microscopy with nanometer resolution will open frontiers in the study of materials and devices, environmental sciences, life sciences by utilizing unique characterization capabilities x-rays. Here we report two-dimensional nanofocusing multilayer Laue lenses (MLLs), a type diffractive optics that is principle capable focusing x-rays to 1 nm. We demonstrate 25 × 27 nm(2) FWHM spot an efficiency 2% at photon energy 12 keV, 40 17% 19.5 keV.
Hard X-ray microscopy is a prominent tool suitable for nanoscale-resolution non-destructive imaging of various materials used in different areas science and technology. With an ongoing effort to push the 2D/3D resolution down 10 nm hard regime, both fabrication nano-focusing optics stability microscope using those become extremely challenging. In this work system designed constructed accommodate multilayer Laue lenses as nanofocusing presented. The developed apparatus has been thoroughly...
Hard x-ray nano-XANES enables high-sensitivity chemical state mapping at the nanoscale and multimodal imaging capability.
The highly convergent x-ray beam focused by multilayer Laue lenses with large numerical apertures is used as a three-dimensional (3D) probe to image layered structures an axial separation larger than the depth of focus. Instead collecting weakly scattered high-spatial-frequency signals, depth-resolving power provided purely intense central cone diverged from beam. Using multi-slice ptychography method combined on-the-fly scan scheme, two layers nanoparticles separated 10 μm are successfully...
Trees are used by animals, humans and machines to classify information make decisions. Natural tree structures displayed synapses of the brain involves potentiation depression capable branching is essential for survival learning. Demonstration such features in synthetic matter challenging due need host a complex energy landscape learning, memory electrical interrogation. We report experimental realization tree-like conductance states at room temperature strongly correlated perovskite...
In this report, we have applied a facile, ligand-free, ambient synthesis protocol toward the fabrication of not only series lead-free Ge-based perovskites with general formulation MA1-x FA x GeI3 (where was changed from 0, 0.25, 0.5, 0.75, to 1) but also CsGeI3. Specifically, our methodology for producing ABX3 systems is generalizable, regardless identity either A site cation or X halide ion. Moreover, it incorporates many advantages, including (i) possibility efficiently generating pure...