BROWSE

Related Scientist

cinap's photo.

cinap
나노구조물리연구단
more info

ITEM VIEW & DOWNLOAD

Investigating heterogeneous defects in single-crystalline WS2 via tip-enhanced Raman spectroscopy

Cited 0 time in webofscience Cited 0 time in scopus
150 Viewed 0 Downloaded
Title
Investigating heterogeneous defects in single-crystalline WS2 via tip-enhanced Raman spectroscopy
Author(s)
Lee, Chanwoo; Jeong, Byeong Geun; Kim, Sung Hyuk; Kim, Dong Hyeon; Seok Joon Yun; Choi, Wooseon; An, Sung-Jin; Lee, Dongki; Young-Min Kim; Ki Kang Kim; Lee, Seung Mi; Jeong, Mun Seok
Publication Date
2022-09
Journal
NPJ 2D MATERIALS AND APPLICATIONS, v.6, no.1
Publisher
NATURE PORTFOLIO
Abstract
© 2022 Springer Nature Limited. Nanoscale defects in two-dimensional (2D) transition metal dichalcogenides (TMDs) alter their intrinsic optical and electronic properties, and such defects require investigation. Atomic-resolution techniques such as transmission electron microscopy detect nanoscale defects accurately but are limited in terms of clarifying precise chemical and optical characteristics. In this study, we investigated nanoscale heterogeneous defects in a single-crystalline hexagonal WS2 monolayer using tip-enhanced Raman spectroscopy (TERS). We observed the Raman properties of heterogeneous defects, which are indicated by the shifted A(1)'(Gamma) modes appearing on the W- and S-edge domains, respectively, with defect-induced Raman (D) mode. In the edge region, various Raman features occur with nanoscale defects. In addition, the TERS signals from single-crystalline WS2 indicate the existence of two majority defects in each domain, which imply S- and W-dominated vacancies. Quantum mechanical computations were performed for each majority defect and demonstrated the defect-induced variation in the vibrational phonon modes. TERS imaging promises to be a powerful technique for determining assorted nanoscale heterogeneous defects as well as for investigating the properties of other nanomaterials.
URI
https://pr.ibs.re.kr/handle/8788114/12853
DOI
10.1038/s41699-022-00334-4
ISSN
2397-7132
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse