ID | 117851 |
Author |
Kato, Ryo
Osaka University|Tokushima University
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Moriyama, Toki
Osaka University
Umakoshi, Takayuki
Osaka University|Japan Science and Technology Agency
Verma, Prabhat
Osaka University
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Content Type |
Journal Article
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Description | Optical nanoimaging techniques, such as tip-enhanced Raman spectroscopy (TERS), are nowadays indispensable for chemical and optical characterization in the entire field of nanotechnology and have been extensively used for various applications, such as visualization of nanoscale defects in two-dimensional (2D) materials. However, it is still challenging to investigate micrometer-sized sample with nanoscale spatial resolution because of severe limitation of measurement time due to drift of the experimental system. Here, we achieved long-duration TERS imaging of a micrometer-sized WS2 sample for 6 hours in a reproducible manner. Our ultrastable TERS system enabled to reveal the defect density on the surface of tungsten disulfide layers in large area equivalent to the device scale. It also helped us to detect rare defect-related optical signals from the sample. The present study paves ways to evaluate nanoscale defects of 2D materials in large area and to unveil remarkable optical and chemical properties of large-sized nanostructured materials.
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Journal Title |
Science Advances
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ISSN | 23752548
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Publisher | American Association for the Advancement of Science
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Volume | 8
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Issue | 28
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Start Page | eabo4021
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Published Date | 2022-07-15
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Rights | © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY) (https://creativecommons.org/licenses/by/4.0/).
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language |
eng
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departments |
Institute of Post-LED Photonics
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