Laser-Induced Particle Adsorption on Atomically Thin MoS2

ACS Applied Materials & Interfaces
Bien Cuong Tran KhacKoo-Hyun Chung

Abstract

Atomically thin molybdenum disulfide (MoS2) shows great potential for use in nanodevices because of its remarkable electronic, optoelectronic, and mechanical properties. These material properties are often dependent on the thickness or the number of layers, and hence Raman spectroscopy is widely used to characterize the thickness of atomically thin MoS2 due to the sensitivity of the vibrational spectrum to thickness. However, the lasers used in Raman spectroscopy can increase the local surface temperature and eventually damage the upper layers of the MoS2, thereby changing the aforementioned material properties. In this work, the effects of lasers on the topography and material properties of atomically thin MoS2 were systematically investigated using Raman spectroscopy and atomic force microscopy. In detail, friction force microscopy was used to study the friction characteristics of atomically thin MoS2 as a function of laser powers from 0.5 to 20 mW and number of layers from 1 to 3. It was found that particles formed on the top surface of the atomically thin MoS2 due to laser-induced thermal effects. The degree of particle formation increased as the laser power increased, prior to the thinning of the atomically thin MoS2. In a...Continue Reading

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Citations

Mar 21, 2019·Nanotechnology·Bien-Cuong Tran-KhacKoo-Hyun Chung
Jun 6, 2017·Nature Communications·Lasse KarvonenZhipei Sun
Sep 27, 2019·Applied Surface Science·Bien-Cuong Tran-KhacKoo-Hyun Chung
Mar 6, 2021·Scientific Reports·Omar Adnan AbbasSakellaris Mailis
Oct 30, 2019·ACS Applied Materials & Interfaces·Jing ChenZhi-Jun Qiu
Feb 22, 2018·ACS Applied Materials & Interfaces·Bien-Cuong Tran KhacKoo-Hyun Chung
May 8, 2018·ACS Applied Materials & Interfaces·Abdullah AlrasheedMoh R Amer

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