Layer-by-layer thinning of two-dimensional MoS2 films by using a focused ion beam

Nanoscale
Ding WangXianying Wang

Abstract

A layer-controlled two-dimensional (2D) molybdenum disulfide (MoS2) film with tunable bandgaps is highly desired for the fabrication of electronic/photoelectronic devices. In this work, we demonstrate that a focused ion beam (FIB) can be applied to thin MoS2 films layer-by-layer. The layer number can be controlled by simply changing the Ga(+) beam exposure time and the thinning speed is about half a layer per second. OM, AFM, PL and Raman spectra were used to monitor the change of layer numbers and characterize the morphology, thickness, and homogeneity of MoS2 films. The FIB layer-by-layer thinning technology will establish a new methodology for rationally thinning all kinds of 2D layered materials.

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Citations

Dec 8, 2017·Nanotechnology·Zhongmei HanMikko Ritala
Dec 15, 2018·Small·Hui-Jun LiJunhe Yang
Nov 21, 2018·Advanced Materials·Yao XiaoLei Fu
Mar 5, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Wugang LiaoHan Zhang
Aug 18, 2018·ACS Applied Materials & Interfaces·Silvan KretschmerArkady V Krasheninnikov
Oct 14, 2017·ACS Applied Materials & Interfaces·Yu-Ting HuangSaptarshi Das
Mar 11, 2020·ACS Applied Materials & Interfaces·Magdalena O CichockaSonia Conesa-Boj
May 8, 2018·ACS Applied Materials & Interfaces·Abdullah AlrasheedMoh R Amer

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