11 Sep 07:07
by Xinsheng
Wang
,
Haining
Liu
,
Juanxia
Wu
,
Junhao
Lin
,
Wen
He
,
Hui
Wang
,
Xinghua
Shi
,
Kazutomo
Suenaga
,
Liming
Xie
Advanced Materials, EarlyView.
11 Sep 07:00
by Rui Wang, Mingjian Shi, Bryson Brewer, Lijie Yang, Yuchen Zhang, Donna J. Webb, Deyu Li, Ya-Qiong Xu
Nano Letters
DOI: 10.1021/acs.nanolett.8b02298
23 May 04:48
by Jian Gao, Lu Li, Jiawei Tan, Hao Sun, Baichang Li, Juan Carlos Idrobo, Chandra Veer Singh, Toh-Ming Lu and Nikhil Koratkar
Nano Letters
DOI: 10.1021/acs.nanolett.6b01180
20 Oct 03:44
by Peng Chen, Jianyong Xiang, Hua Yu, Jing zhang, Guibai Xie, Shuang Wu, Xiaobo Lu, Guole Wang, Jing Zhao, Fusheng Wen, Zhongyuan Liu, Rong Yang, Dongxia Shi and Guangyu Zhang
Heterojunctions are essential building blocks for modern electronic and optoelectronic devices. The
recent discovery of two-dimensional semiconductors offers an opportunity to build these
heterojunctions with atomic sharp interfaces by van der Waals interaction. Here we fabricated MoS 2
–black phosphorus (BP) heterojunction devices. Due to the narrow band-gap and unpinned Fermi level
of BP, this heterojunction could be tuned to either p–n or n–n by the electrostatic gating. The
current rectification behaviors were observed in both p–n and n–n junctions. The current
rectification of the MoS 2 –BP n–n junction was attributed to the energy barrier formed at the
interface of wide band-gap MoS 2 and narrow band-gap BP. The gate dependence of forward current,
reverse current and current rectification properties of the heterojunction at different thickness
scale were systematically studied, suggesting the electrical properties of the heterojunction could
be c...
20 Oct 03:44
by Thangavelu Palaniselvam and Jong-Beom Baek
Ever-increasing energy demands and the depletion of fossil fuels are compelling humanity toward the
development of suitable electrochemical energy conversion and storage devices to attain a more
sustainable society with adequate renewable energy and zero environmental pollution. In this regard,
supercapacitors are being contemplated as potential energy storage devices to afford cleaner,
environmentally friendly energy. Recently, a great deal of attention has been paid to
two-dimensional (2D) nanomaterials, including 2D graphene and its inorganic analogues (transition
metal double layer hydroxides, chalcogenides, etc), as potential electrodes for the development of
supercapacitors with high electrochemical performance. This review provides an overview of the
recent progress in using these graphene-based 2D materials as potential electrodes for
supercapacitors. In addition, future research trends including notable challenges and opportunities
are also discussed.
20 Oct 03:41
by G Plechinger, F Mooshammer, A Castellanos-Gomez, G A Steele, C Schüller and T Korn
We perform an optical spectroscopy study to investigate the properties of different artificial MoS 2
bi- and trilayer stacks created from individual monolayers by a deterministic transfer process.
These twisted bi- and trilayers differ from the common 2H stacking in mineral MoS 2 in the relative
stacking angle of adjacent layers and the interlayer distance. The combination of Raman
spectroscopy, second-harmonic-generation microscopy and photoluminescence measurements allows us to
determine the degree of interlayer coupling in our samples. We find that even for electronically
decoupled artificial structures, which show the same valley polarization degree as the constituent
MoS 2 monolayers at low temperatures, there is a resonant energy transfer between individual layers
which acts as an effective luminescence quenching mechanism.
07 Mar 21:39
by Oriol Lopez-Sanchez, Esther Alarcon Llado, Volodymyr Koman, Anna Fontcuberta i Morral, Aleksandra Radenovic and Andras Kis
ACS Nano
DOI: 10.1021/nn500480u