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33 results

Page 1 of 2

  • Strain Distribution Analysis during Tensile Deformation of Silicon Nanowire with 4D-STEM

  • Sihan Wang, Hongyu Wang, Xiaotian Fang, Yong Zhu, Wenpei Gao
  • Journal:
    / Volume 28 / Issue S1 / August 2022
    Published online by Cambridge University Press:
    22 July 2022, pp. 1918-1920
    Print publication:
    August 2022
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  • Atomistic Reaction Kinetics and Chemistry Revealed using In Situ STEM

  • Jacob Smith, Xi Chen, Wenpei Gao
  • Journal:
    / Volume 28 / Issue S1 / August 2022
    Published online by Cambridge University Press:
    22 July 2022, pp. 1838-1839
    Print publication:
    August 2022
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  • Characterization and Growth of Quad Unit Cell Linear Defects in Potassium Tantalate

  • Tim B. Eldred, Kaveh Ahadi, Wenpei Gao
  • Journal:
    / Volume 28 / Issue S1 / August 2022
    Published online by Cambridge University Press:
    22 July 2022, pp. 1720-1721
    Print publication:
    August 2022
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  • Correcting Scan Distortions in Cryogenic 4DSTEM Acquisitions using Affine Transformations

  • Jacob Smith, Wenpei Gao, Miaofang Chi, Guannan Zhang
  • Journal:
    / Volume 28 / Issue S1 / August 2022
    Published online by Cambridge University Press:
    22 July 2022, pp. 490-491
    Print publication:
    August 2022
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  • Probing the Dynamics of Phase Transformation in Nanostructures by STEM Imaging and Spectroscopy

  • Wenpei Gao, Peter Tieu, Xiaoqing Pan
  • Journal:
    / Volume 27 / Issue S1 / August 2021
    Published online by Cambridge University Press:
    30 July 2021, pp. 1964-1966
    Print publication:
    August 2021
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  • Phase transition and atomic scale dynamics in chemical reactions revealed in the solid state by electron microscopy

  • Jacob Smith, Wenpei Gao
  • Journal:
    / Volume 27 / Issue S1 / August 2021
    Published online by Cambridge University Press:
    30 July 2021, pp. 2210-2211
    Print publication:
    August 2021
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  • In Situ Observations of the Dynamics of Pd@Pt Core-Shell Nanoparticles in Electrolyte

  • Wenpei Gao, Fenglei Shi, Hao Shan, Jianbo Wu, Xiaoqing Pan
  • Journal:
    / Volume 27 / Issue S1 / August 2021
    Published online by Cambridge University Press:
    30 July 2021, pp. 234-236
    Print publication:
    August 2021
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  • Multiscale Electric Field Imaging of Vortices in PbTiO3-SrTiO3 Superlattice

  • Christopher Addiego, Wenpei Gao, Xiaoqing Pan
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 466-468
    Print publication:
    August 2020
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  • In Situ Transformation of Two Dimensional MoS2 from Amorphous Precursor

  • Peter Tieu, Wenpei Gao, Xiaoqing Pan
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 2332-2334
    Print publication:
    August 2020
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  • From ion to atom to dendrite: Formation and nanomechanical behavior of electrodeposited lithium

  • Michael A. Citrin, Heng Yang, Simon K. Nieh, Joel Berry, Wenpei Gao, Xiaoqing Pan, David J. Srolovitz, Julia R. Greer
  • Journal:
    MRS Bulletin / Volume 45 / Issue 11 / November 2020
    Published online by Cambridge University Press:
    09 July 2020, pp. 891-904
    Print publication:
    November 2020

  • Development of high energy density solid-state batteries with Li metal anodes has been limited by uncontrollable growth of Li dendrites in liquid and solid electrolytes (SEs). This, in part, may be caused by a dearth of information about mechanical properties of Li, especially at the nano- and microlength scales and microstructures relevant to Li batteries. We investigate Li electrodeposited in a commercial LiCoO2/LiPON/Cu solid-state thin-film cell, grown in situ in a scanning electron microscope equipped with nanomechanical capabilities. Experiments demonstrate that Li was preferentially deposited at the LiPON/Cu interface along the valleys that mimic the domain boundaries of underlying LiCoO2 (cathode). Cryogenic electron microscopy analysis of electrodeposited Li revealed a single-crystalline microstructure, and in situ nanocompression experiments on nano-pillars with 360–759 nm diameters revealed their average Young's modulus to be 6.76 ± 2.88 GPa with an average yield stress of 16.0 ± 6.82 MPa, ~24x higher than what has been reported for bulk polycrystalline Li. We discuss mechanical deformation mechanisms, stiffness, and strength of nano-sized electrodeposited Li in the framework of its microstructure and dislocation-governed nanoscale plasticity of crystals, and place it in the parameter space of existing knowledge on small-scale Li mechanics. The enhanced strength of Li at small scales may explain why it can penetrate and fracture through much stiffer and harder SEs than theoretically predicted.

  • Charge Density Mapping via Scanning Diffraction in Scanning Transmission Electron Microscopy

  • Christopher Addiego, Wenpei Gao, Xiaoqing Pan
  • Journal:
    / Volume 25 / Issue S2 / August 2019
    Published online by Cambridge University Press:
    05 August 2019, pp. 18-19
    Print publication:
    August 2019
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  • Transmission Electron Microscopy of Catalytic Nanomaterials at Atomic Resolution

  • Sheng Dai, Xingxu Yan, Wenpei Gao, Peter Tieu, George W. Graham, Xiaoqing Pan
  • Journal:
    / Volume 25 / Issue S2 / August 2019
    Published online by Cambridge University Press:
    05 August 2019, pp. 2054-2055
    Print publication:
    August 2019
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Page 1 of 2