journal article·2020-09-23Open access

Complete Strain Mapping of Nanosheets of Tantalum Disulfide

Yue Cao, Tadesse Assefa, Soham Banerjee, Andrew Wieteska, Dennis Zi-Ren Wang, Abhay Pasupathy, Xiao Tong, Yu Liu, Wenjian Lu, Yu-Ping Sun, Yan He, Xiaojing Huang, Hanfei Yan, Yong S. Chu, Simon J. L. Billinge, Ian K. Robinson

ACS Applied Materials & Interfaces· Volume 12· Issue 38

Abstract

Quasi-two-dimensional (quasi-2D) materials hold promise for future electronics because of their unique band structures that result in electronic and mechanical properties sensitive to crystal strains in all three dimensions. Quantifying crystal strain is a prerequisite to correlating it with the performance of the device and calls for high resolution but spatially resolved rapid characterization methods. Here, we show that using fly-scan nano X-ray diffraction, we can accomplish a tensile strain sensitivity below 0.001% with a spatial resolution of better than 80 nm over a spatial extent of 100 μm on quasi-2D flakes of 1T-TaS2. Coherent diffraction patterns were collected from a ∼100 nm thick sheet of 1T-TaS2 by scanning a 12 keV focused X-ray beam across and rotating the sample. We demonstrate that the strain distribution around micron- and submicron-sized “bubbles” that are present in the sample may be reconstructed from these images. The experiments use state-of-the-art synchrotron instrumentation and will allow rapid and nonintrusive strain mapping of thin-film samples and electronic devices based on quasi-2D materials.
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Research context

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Ga2O3 and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States

Materials Science Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States

Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States

Department of Physics, Columbia University, New York, New York 10027, United States

Center for Functional Nanomaterials (CFN), Brookhaven National Laboratory, Upton, New York 11973, United States

Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China

High Magnetic Laboratory, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China

Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China

Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China

National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States

Funding

Natural Science Foundation of Shanghai · Ministry of Science and Technology of the People's Republic of China · Army Research Office · Basic Energy Sciences · Air Force Office of Scientific Research · Office of Naval Research · U.S. Department of Defense · U.S. Department of Energy · National Natural Science Foundation of China

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