期刊
ADVANCED MATERIALS
卷 29, 期 19, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201605785
关键词
2D materials; anisotropy; molybdenum disulfide; self-organized nanopatterning; transition metal dichalcogenides
类别
资金
- Compagnia di San Paolo [ROL 9361]
- MAECI
- European project [FP7-PEOPLE-2013-CIG LSIE 2D]
- Italian MIUR program Progetto Premiale, Project ABNANOTECH
- MIUR [2015WTW7J3]
- Fondazione CARIPLO
- Regione Lombardia [2016-0978]
Manipulating the anisotropy in 2D nanosheets is a promising way to tune or trigger functional properties at the nanoscale. Here, a novel approach is presented to introduce a one-directional anisotropy in MoS2 nanosheets via chemical vapor deposition (CVD) onto rippled patterns prepared on ion-sputtered SiO2/Si substrates. The optoelectronic properties of MoS2 are dramatically affected by the rippled MoS2 morphology both at the macro- and the nanoscale. In particular, strongly anisotropic phonon modes are observed depending on the polarization orientation with respect to the ripple axis. Moreover, the rippled morphology induces localization of strain and charge doping at the nanoscale, thus causing substantial redshifts of the phonon mode frequencies and a topography-dependent modulation of the MoS2 workfunction, respectively. This study paves the way to a controllable tuning of the anisotropy via substrate pattern engineering in CVD-grown 2D nanosheets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据