Understanding 2D Crystal Vertical Heterostructures at the Atomic Scale Using Advanced Scanning Transmission Electron Microscopy
Sarah J. Haigh,A. P. Rooney,Thomas J. A. Slater,Eric Prestat,Ekaterina Khestanova,Robert A. W. Dryfe,Matej Velický,Roman V. Gorbachev,Rada Boya,Yang Cao,Irina V. Grigorieva,Kostya S. Novoselov,F. Withers,Andre K. Geim +13 more
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TLDR
In this article, cross sectional imaging using atomic resolution transmission electron microscopy (TEM) was used to characterize the nature of buried interfaces in these engineered van der Waals crystals and showed that the performance of such materials is strongly dependent on the quality of the crystals and the interfaces between different crystals.Abstract:
The emerging area of two dimensional (2D) materials has attracted a great deal of scientific attention in recent years. Like graphene, these materials can be exfoliated to single atom thickness and can then be mechanically layered together to create new van der Waals crystals with bespoke properties. However the performance of such materials is strongly dependent on the quality of the crystals and the interfaces between different crystals. Cross sectional imaging using atomic resolution transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) is the only technique able to characterize the nature of buried interfaces in these engineered van der Waals crystals [1].read more
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Journal ArticleDOI
Vertical field-effect transistor based on graphene?WS2 heterostructures for flexible and transparent electronics
Thanasis Georgiou,Rashid Jalil,Branson D. Belle,L. Britnell,Roman V. Gorbachev,Sergey V. Morozov,Yong-Jin Kim,Yong-Jin Kim,Ali Gholinia,Sarah J. Haigh,Oleg Makarovsky,Laurence Eaves,Laurence Eaves,Leonid Ponomarenko,Andre K. Geim,Konstantin S. Novoselov,Artem Mishchenko +16 more
TL;DR: A new generation of field-effect vertical tunnelling transistors where two-dimensional tungsten disulphide serves as an atomically thin barrier between two layers of either mechanically exfoliated or chemical vapour deposition-grown graphene are described.
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Light-emitting diodes by band-structure engineering in van der Waals heterostructures
Freddie Withers,O. Del Pozo-Zamudio,Artem Mishchenko,A. P. Rooney,Ali Gholinia,Kenji Watanabe,T. Taniguchi,Sarah J. Haigh,Andre K. Geim,Alexander I. Tartakovskii,Kostya S. Novoselov +10 more
TL;DR: In this paper, the authors describe light-emitting diodes (LEDs) made by stacking metallic graphene, insulating hexagonal boron nitride and various semiconducting monolayers into complex but carefully designed sequences.
Journal ArticleDOI
Light-emitting diodes by bandstructure engineering in van der Waals heterostructures
F. Withers,O. Del Pozo-Zamudio,Artem Mishchenko,A. P. Rooney,Ali Gholinia,Kenji Watanabe,T. Taniguchi,Sarah J. Haigh,A. K. Geim,Alexander I. Tartakovskii,K. S. Novoselov +10 more
TL;DR: It is shown that light-emitting diodes made by stacking metallic graphene, insulating hexagonal boron nitride and various semiconducting monolayers into complex but carefully designed sequences can also provide the basis for flexible and semi-transparent electronics.
Journal ArticleDOI
Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices.
Sarah J. Haigh,Ali Gholinia,Rashid Jalil,S. Romani,L. Britnell,D. C. Elias,Kostya S. Novoselov,L. A. Ponomarenko,Andre K. Geim,Roman V. Gorbachev +9 more
TL;DR: In this paper, a cross sectional TEM view of several graphene and boron nitride heterostructures is presented, showing that the trapped hydrocarbons segregate into isolated pockets, leaving the interfaces atomically clean.
Journal ArticleDOI
Molecular transport through capillaries made with atomic-scale precision
Boya Radha,Ali Esfandiar,FengChao Wang,A. P. Rooney,Kalon Gopinadhan,Ashok Keerthi,Artem Mishchenko,A. Janardanan,Peter Blake,Laura Fumagalli,M. Lozada-Hidalgo,Slaven Garaj,Sarah J. Haigh,Irina V. Grigorieva,HengAn Wu,Andre K. Geim +15 more
TL;DR: This work reports the fabrication of narrow and smooth capillaries through van der Waals assembly, with atomically flat sheets at the top and bottom separated by spacers made of two-dimensional crystals with a precisely controlled number of layers, using graphene and its multilayers as archetypalTwo-dimensional materials to demonstrate this technology.