Unveiling Defect-Related Raman Mode of Monolayer WS2 via Tip-Enhanced Resonance Raman Scattering

ACS Nano
Chanwoo LeeMun Seok Jeong

Abstract

Monolayer tungsten disulfide (WS2) has emerged as an active material for optoelectronic devices due to its quantum yield of photoluminescence. Despite the enormous research about physical characteristics of monolayer WS2, the defect-related Raman scattering has been rarely studied. Here, we report the correlation of topography and Raman scattering in monolayer WS2 by using tip-enhanced resonance Raman spectroscopy and reveal defect-related Raman modes denoted as D and D' modes. We found that the sulfur vacancies introduce not only the red-shifted A1g mode but also the D and D' modes by the density functional theory calculations. The observed defect-related Raman modes can be utilized to evaluate the quality of monolayer WS2 and will be helpful to improve the performance of WS2 optoelectronic devices.

References

Dec 13, 2006·Physical Review Letters·A C FerrariA K Geim
Nov 23, 2011·Nanoscale·Johannes StadlerRenato Zenobi
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Dec 4, 2012·Nature Materials·Kin Fai MakJie Shan
Sep 4, 2013·Nanoscale·Weijie ZhaoGoki Eda
Oct 22, 2013·Nature Nanotechnology·A GiugniE Di Fabrizio
Oct 24, 2013·Nature Communications·Hao QiuXinran Wang
Aug 26, 2014·Nature Materials·Chunming HuangXiaodong Xu
Aug 26, 2014·Nature Nanotechnology·Xiaoping HongFeng Wang
Sep 30, 2014·Nature Nanotechnology·Xidong DuanXiangfeng Duan
Jun 20, 2015·Nature Communications·Hong LiXiaolin Zheng
Mar 22, 2016·ACS Nano·William M ParkinMarija Drndić
Nov 29, 2016·Nature Communications·Hyun Seok LeeYoung Hee Lee
Dec 10, 2016·Advanced Materials·Kyoung-Duck ParkMun Seok Jeong
Feb 9, 2017·Advanced Materials·Hye Yun JeongYoung Hee Lee

❮ Previous
Next ❯

Citations

Dec 6, 2020·Scientific Reports·Rhea Thankam SamPrabhat Verma
Apr 1, 2020·The Journal of Physical Chemistry Letters·Eunah KimDong-Wook Kim

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.