Quality Heterostructures from Two-Dimensional Crystals Unstable in Air by Their Assembly in Inert Atmosphere
Yang Cao,Artem Mishchenko,Geliang Yu,Ekaterina Khestanova,A. P. Rooney,Eric Prestat,Andrey V. Kretinin,Peter Blake,Moshe Ben Shalom,Colin R. Woods,J. Chapman,Geetha Balakrishnan,Irina V. Grigorieva,Konstantin S. Novoselov,Benjamin A. Piot,Marek Potemski,Kenji Watanabe,T. Taniguchi,Sarah J. Haigh,Andre K. Geim,Roman V. Gorbachev +20 more
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TLDR
A remedial approach based on cleavage, transfer, alignment, and encapsulation of air-sensitive crystals, all inside a controlled inert atmosphere, which offers a venue to significantly expand the range of experimentally accessible two-dimensional crystals and their heterostructures.Abstract:
Many layered materials can be cleaved down to individual atomic planes, similar to graphene, but only a small minority of them are stable under ambient conditions. The rest react and decompose in air, which has severely hindered their investigation and potential applications. Here we introduce a remedial approach based on cleavage, transfer, alignment, and encapsulation of air-sensitive crystals, all inside a controlled inert atmosphere. To illustrate the technology, we choose two archetypal two-dimensional crystals that are of intense scientific interest but are unstable in air: black phosphorus and niobium diselenide. Our field-effect devices made from their monolayers are conductive and fully stable under ambient conditions, which is in contrast to the counterparts processed in air. NbSe2 remains superconducting down to the monolayer thickness. Starting with a trilayer, phosphorene devices reach sufficiently high mobilities to exhibit Landau quantization. The approach offers a venue to significantly ex...read more
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Direct Visualization of Large-Scale Intrinsic Atomic Lattice Structure and Its Collective Anisotropy in Air-Sensitive Monolayer 1T'- WTe2.
TL;DR: In this article, a large-scale intact lattice structure of air-sensitive monolayer 1T'-WTe2 is directly visualized by atom-resolved scanning transmission electron microscopy.
Journal ArticleDOI
Constructing van der Waals heterostructures by dry-transfer assembly for novel optoelectronic device
Xiaolu Xiong,Fei Hui,Dongliang Yang,Jinbao Jiang,Wanxiang Feng,Junfeng Han,Junxi Duan,Zhongrui Wang,Linfeng Sun +8 more
TL;DR: In this paper , a review summarizes the optimized dry transfer methods, which paves the way towards high-quality 2D material heterostructures with optimized interfaces, which also lead to new physical phenomena while enable novel optoelectronic applications on artificial van der Waals (vdW), which are discussed in the last part of this review.
Journal ArticleDOI
Multiple mechanisms of the low temperature photoresponse in niobium diselenide
TL;DR: In this paper, the photoresponse generated in homogenous NbSe2 nano-flakes near the superconducting critical temperature (Tc) was investigated and three distinctive mechanisms of the photoresponse were established, including the photo-induced phase transition from the super-conducting to normal state, which is tunable by the bias voltage and consistent with the observation via the electrical transport characterization.
Journal ArticleDOI
Quasi-two-dimensional NaCl crystals encapsulated between graphene sheets and their decomposition under an electron beam.
Tibor Lehnert,Silvan Kretschmer,Fredrik Bräuer,Arkady V. Krasheninnikov,Arkady V. Krasheninnikov,Ute Kaiser +5 more
TL;DR: In this paper, quasi-two-dimensional (2D) sodium chloride (NaCl) crystals of various lateral sizes between graphene sheets were manufactured via supersaturation from a saline solution, and they were used for in-situ investigations of the crystals and their decomposition under an 80kV electron beam.
Journal ArticleDOI
Simple fabrication method for atomically-thin crystal devices with polymer passivation
Yong Hyeon Kim,So-Young Kim,Youngwook Kim,Jong Mok Ok,Changil Kwon,Sangwook Lee,Jun Sung Kim +6 more
TL;DR: In this article, the authors developed a simple procedure for fabricating the electronic devices based on air-sensitive crystals with polymer passivation using a mechanical transfer method combined with regular electron-beam lithography.
References
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Journal ArticleDOI
Two-dimensional atomic crystals
Kostya S. Novoselov,Da Jiang,Fred Schedin,Timothy J. Booth,V. V. Khotkevich,Sergey V. Morozov,Andre K. Geim +6 more
TL;DR: By using micromechanical cleavage, a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides are prepared and studied.
Journal ArticleDOI
Van der Waals heterostructures
TL;DR: With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.
Journal ArticleDOI
Black phosphorus field-effect transistors
Likai Li,Yijun Yu,Guo Jun Ye,Q. Q. Ge,Xuedong Ou,Hua Wu,Donglai Feng,Xianhui Chen,Yuanbo Zhang +8 more
TL;DR: In this article, a few-layer black phosphorus crystals with thickness down to a few nanometres are used to construct field effect transistors for nanoelectronic devices. But the performance of these materials is limited.
Journal ArticleDOI
Boron nitride substrates for high-quality graphene electronics
Cory Dean,Andrea Young,Inanc Meric,Changgu Lee,Lei Wang,Sebastian Sorgenfrei,Kenji Watanabe,Takashi Taniguchi,Philip Kim,Kenneth L. Shepard,James Hone +10 more
TL;DR: Graphene devices on h-BN substrates have mobilities and carrier inhomogeneities that are almost an order of magnitude better than devices on SiO(2).
Journal ArticleDOI
Phosphorene: An Unexplored 2D Semiconductor with a High Hole Mobility
TL;DR: In this paper, the 2D counterpart of layered black phosphorus, which is called phosphorene, is introduced as an unexplored p-type semiconducting material and the authors find that the band gap is direct, depends on the number of layers and the in-layer strain, and significantly larger than the bulk value of 0.31-0.36 eV.