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70 results

Page 1 of 4

  • A Roadmap for Edge Computing Enabled Automated Multidimensional Transmission Electron Microscopy

  • Debangshu Mukherjee, Kevin M. Roccapriore, Anees Al-Najjar, Ayana Ghosh, Jacob D. Hinkle, Andrew R. Lupini, Rama K. Vasudevan, Sergei V. Kalinin, Olga S. Ovchinnikova, Maxim A. Ziatdinov, Nageswara S. Rao
  • Journal:
    / Volume 30 / Issue 6 / November 2022
    Published online by Cambridge University Press:
    24 November 2022, pp. 10-19
    Print publication:
    November 2022
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  • The advent of modern, high-speed electron detectors has made the collection of multidimensional hyperspectral transmission electron microscopy datasets, such as 4D-STEM, a routine. However, many microscopists find such experiments daunting since analysis, collection, long-term storage, and networking of such datasets remain challenging. Some common issues are their large and unwieldy size that often are several gigabytes, non-standardized data analysis routines, and a lack of clarity about the computing and network resources needed to utilize the electron microscope. The existing computing and networking bottlenecks introduce significant penalties in each step of these experiments, and thus, real-time analysis-driven automated experimentation for multidimensional TEM is challenging. One solution is to integrate microscopy with edge computing, where moderately powerful computational hardware performs the preliminary analysis before handing off the heavier computation to high-performance computing (HPC) systems. Here we trace the roots of computation in modern electron microscopy, demonstrate deep learning experiments running on an edge system, and discuss the networking requirements for tying together microscopes, edge computers, and HPC systems.

  • Automatic and Quantitative Measurement of Spectrometer Aberrations in Monochromated EELS

  • Yueming Guo, Andrew R. Lupini
  • Journal:
    / Volume 28 / Issue S1 / August 2022
    Published online by Cambridge University Press:
    22 July 2022, pp. 3108-3110
    Print publication:
    August 2022
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  • Contrast Mechanisms in Secondary Electron e-Beam-Induced Current (SEEBIC) Imaging

  • Ondrej Dyck, Jacob L. Swett, Charalambos Evangeli, Andrew R. Lupini, Jan Mol, Stephen Jesse
  • Journal:
    / Volume 28 / Issue 5 / October 2022
    Published online by Cambridge University Press:
    30 May 2022, pp. 1567-1583
    Print publication:
    October 2022
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  • Over the last few years, a new mode for imaging in the scanning transmission electron microscope (STEM) has gained attention as it permits the direct visualization of sample conductivity and electrical connectivity. When the electron beam (e-beam) is focused on the sample in the STEM, secondary electrons (SEs) are generated. If the sample is conductive and electrically connected to an amplifier, the SE current can be measured as a function of the e-beam position. This scenario is similar to the better-known scanning electron microscopy-based technique, electron beam-induced current imaging, except that the signal in the STEM is generated by the emission of SEs, hence the name secondary electron e-beam-induced current (SEEBIC), and in this case, the current flows in the opposite direction. Here, we provide a brief review of recent work in this area, examine the various contrast generation mechanisms associated with SEEBIC, and illustrate its use for the characterization of graphene nanoribbon devices.

  • Electron Beam Control of Dopants in 2D and 3D Materials

  • Andrew R. Lupini, Bethany Hudak, Stephen Jesse, Jiaming Song, Ondrej Dyck, Paul Snijders, Sergei Kalinin
  • Journal:
    / Volume 27 / Issue S1 / August 2021
    Published online by Cambridge University Press:
    30 July 2021, pp. 2150-2153
    Print publication:
    August 2021
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  • Cryogenic Atomic Resolution and 4D STEM Imaging for Energy and Quantum Materials

  • Miaofang Chi, Andrew R. Lupini
  • Journal:
    / Volume 27 / Issue S1 / August 2021
    Published online by Cambridge University Press:
    30 July 2021, pp. 384-385
    Print publication:
    August 2021
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  • Super-Graphene: The Role of Temperature on Radiation Resistance

  • Ondrej Dyck, Jacob Swett, Andrew Lupini and Stephen Jesse
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 2360-2361
    Print publication:
    August 2020
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  • Imaging Conductivity in a Single Atomic Layer

  • Ondrej Dyck, Jacob Swett, Andrew Lupini, Stephen Jesse
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 1704-1705
    Print publication:
    August 2020
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  • Stabilizing Fuel Cell Materials Through Cryogenic Cooling for Simultaneous EELS-EDS Analysis

  • David Cullen, Michael Zachman, Andrew Lupini, Miaofang Chi
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 1660-1662
    Print publication:
    August 2020
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  • Accurately Imaging, Tracking and Moving Single Atoms

  • Andrew Lupini, Bethany Hudak, Stephen Jesse, Jiaming Song, Ondrej Dyck, Paul Snijders, Sergei Kalinin
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 2556-2557
    Print publication:
    August 2020
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  • Investigation of Structural Phases in Mo1-xWxTe2 in STEM

  • Yueming Guo, Sergei Kalinin, Hui Cai, Kai Xiao, Sergiy Krylyuk, Albert Davydov, Andrew Lupini
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 2362-2364
    Print publication:
    August 2020
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  • Uncovering the Mechanism for Electron-beam Manipulation of Dopants in Silicon

  • Alexander Markevich, Bethany Hudak, Andrew Lupini, Toma Susi
  • Journal:
    / Volume 26 / Issue S2 / August 2020
    Published online by Cambridge University Press:
    30 July 2020, pp. 2560-2561
    Print publication:
    August 2020
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Page 1 of 4