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arXiv 1706.08573cond-mat.mtrl-sci
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氧化物介导的等离子体处理的MoS $_2$中场效应迁移率的自限性恢复

Oxide-mediated self-limiting recovery of field effect mobility in plasma-treated MoS$_2$

Jakub Jadwiszczak, Colin O'Callaghan, Yangbo Zhou, Daniel S. Fox, Eamonn Weitz, Darragh Keane, Ian O'Reilly, Clive Downing, Aleksey Shmeliov, Pierce Maguire, Jo… 展开作者

Jakub Jadwiszczak, Colin O'Callaghan, Yangbo Zhou, Daniel S. Fox, Eamonn Weitz, Darragh Keane, Ian O'Reilly, Clive Downing, Aleksey Shmeliov, Pierce Maguire, John J. Gough, Cormac McGuinness, Mauro S. Ferreira, A. Louise Bradley, John J. Boland, Valeria Nicolosi, Hongzhou Zhang

摘要:

二维纳米材料的电子性质的精确可调性是当前材料科学这一领域研究的关键目标。层状过渡金属二硫属化物的化学改性导致这些材料的低维变体的异质结构的产生。特别地,含氧等离子体处理对二硫化钼(MoS $_2$)的影响长期以来被认为对材料的电性能有害。在这里,我们表明,流动性和导电性的MoS $_2$可以精确地控制和改善系统暴露于氧:氩等离子体,并利用先进的光谱学和显微镜检查的材料。通过证实电导率增强的补充理论模型,我们揭示了二维三氧化钼相(2D-MoO $_3$)在改善材料电子行为方面的作用。推导的有益作用的钼$_3$将有助于打开领域的新方法,就可调谐性的二维半导体的低维氧化物在纳米改性的异质结构。

英文摘要:

Precise tunability of electronic properties of 2D nanomaterials is a key goal of current research in this field of materials science. Chemical modification of layered transition metal dichalcogenides leads to the creation of heterostructures of low-dimensional variants of these materials. In particular, the effect of oxygen-containing plasma treatment on molybdenum disulfide (MoS$_2$) has long been thought to be detrimental to the electrical performance of the material. Here we show that the mobility and conductivity of MoS$_2$ can be precisely controlled and improved by systematic exposure to oxygen:argon plasma, and characterise the material utilising advanced spectroscopy and microscopy. Through complementary theoretical modelling which confirms conductivity enhancement, we uncover the role of a two-dimensional phase of molybdenum trioxide (2D-MoO$_3$) in improving the electronic behaviour of the material. Deduction of the beneficial role of MoO$_3$ will serve to open the field to new approaches with regard to the tunability of 2D semiconductors by their low-dimensional oxides in nano-modified heterostructures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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