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Unexpected catalytic activity of nanorippled graphene
P. Z. Sun, W. Q. Xiong, A. Bera +11
Graphite is one of the most chemically inert materials. Its elementary constituent, monolayer graphene, is generally expected to inherit most of the parent material's properties in…
Highly Efficient and Selective Extraction of Gold by Reduced Graphene Oxide
Fei Li, Jiuyi Zhu, Pengzhan Sun +8
Materials that are capable of extracting gold from complex sources, especially electronic waste (e-waste) with high efficiency are needed for gold resource sustainability and effec…
Two-dimensional covalent crystals by chemical conversion of thin van der Waals materials
Vishnu Sreepal, Mehmet Yagmurcukardes, Kalangi S. Vasu +14
Most of the studied two-dimensional (2D) materials have been obtained by exfoliation of van der Waals crystals. Recently, there has been growing interest in fabricating synthetic 2…
Electrically controlled water permeation through graphene oxide membranes
K. -G. Zhou, K. S. Vasu, C. T. Cherian +14
Developing 'smart' membranes that allow precise and reversible control of molecular permeation using external stimuli would be of intense interest for many areas of science: from p…
Intercalant-independent transition temperature in superconducting black phosphorus
Renyan Zhang, John Waters, Andre K. Geim +1
Research on black phosphorus (BP) has been experiencing a renaissance over the last few years, after the demonstration that few-layer BP exhibits high carrier mobility and a thickn…
Unraveling the 3D atomic structure of a suspended graphene/hBN van der Waals heterostructure
G. Argentero, A. Mittelberger, M. R. A. Monazam +7
In this work we demonstrate that a free-standing van der Waals heterostructure, usually regarded as a flat object, can exhibit an intrinsic buckled atomic structure resulting from…
Scalable and efficient separation of hydrogen isotopes using graphene-based electrochemical pumping
M. Lozada-Hidalgo, S. Zhang, S. Hu +3
Thousands of tons of isotopic mixtures are processed annually for heavy-water production and tritium decontamination. The existing technologies remain extremely energy intensive an…
Tuneable Sieving of Ions Using Graphene Oxide Membranes
J. Abraham, K. S. Vasu, C. D. Williams +10
Graphene oxide membranes show exceptional molecular permeation properties, with a promise for many applications. However, their use in ion sieving and desalination technologies is…
Molecular transport through capillaries made with atomic-scale precision
B. Radha, A. Esfandiar, F. C. Wang +13
Nanometre-scale pores and capillaries have long been studied because of their importance in many natural phenomena and their use in numerous applications. A more recent development…
Van der Waals pressure and its effect on trapped interlayer molecules
K. S. Vasu, E. Prestat, J. Abraham +9
Van der Waals assembly of two-dimensional (2D) crystals continue attract intense interest due to the prospect of designing novel materials with on-demand properties. One of the uni…
Sieving hydrogen isotopes through two dimensional crystals
M. Lozada-Hidalgo, S. Hu, O. Marshall +6
One-atom-thick crystals are impermeable to atoms and molecules, but hydrogen ions (thermal protons) penetrate through them. We show that monolayers of graphene and boron nitride ca…
High thermal conductivity of hexagonal boron nitride laminates
Jin-Cheng Zheng, Liang Zhang, Andrey V Kretinin +12
Two-dimensional materials are characterised by a number of unique physical properties which can potentially make them useful to a wide diversity of applications. In particular, the…
Extremely large magnetoresistance in few-layer graphene/boron-nitride heterostructures
Kalon Gopinadhan, Young Jun Shin, Rashid Jalil +4
Understanding magnetoresistance, the change in electrical resistance upon an external magnetic field, at the atomic level is of great interest both fundamentally and technologicall…
Proton transport through one atom thick crystals
S. Hu, M. Lozada-Hidalgo, F. C. Wang +10
Graphene is impermeable to all gases and liquids, and even such a small atom as hydrogen is not expected to penetrate through graphene's dense electronic cloud within billions of y…
Atomically Resolved Imaging of Highly Ordered Alternating Fluorinated Graphene
Reza J. Kashtiban, M. Adam Dyson, Rahul R. Nair +6
One of the most desirable goals of graphene research is to produce ordered 2D chemical derivatives of suitable quality for monolayer device fabrication. Here we reveal, by focal se…
Heterostructures produced from nanosheet-based inks
F. Withers, H. Yang, L. Britnell +13
The new paradigm of heterostructures based on two-dimensional (2D) atomic crystals has already led to the observation of exciting physical phenomena and creation of novel devices.…
Impermeable Barrier Films and Protective Coatings Based on Reduced Graphene Oxide
Y. Su, V. G. Kravets, S. L. Wong +3
Barrier films preventing permeation of gases and moistures are important for many industries ranging from food to medical and from chemical to electronic. From this perspective, gr…
Precise and ultrafast molecular sieving through graphene oxide membranes
R. K. Joshi, P. Carbone, F. C. Wang +6
There has been intense interest in filtration and separation properties of graphene-based materials that can have well-defined nanometer pores and exhibit low frictional water flow…
Accurate determination of electron-hole asymmetry and next-nearest neighbor hopping in graphene
A. Kretinin, G. L. Yu, R. Jalil +7
The next-nearest neighbor hopping term t' determines a magnitude and, hence, importance of several phenomena in graphene, which include self-doping due to broken bonds and the Klei…
Van der Waals heterostructures
A. K. Geim, I. V. Grigorieva
Research on graphene and other two-dimensional atomic crystals is intense and likely to remain one of the hottest topics in condensed matter physics and materials science for many…
Revealing common artifacts due to ferromagnetic inclusions in highly-oriented pyrolytic graphite
M. Sepioni, R. R. Nair, I-Ling Tsai +2
We report on an extensive investigation to figure out the origin of room-temperature ferromagnetism that is commonly observed by SQUID magnetometry in highly-oriented pyrolytic gra…
Unimpeded permeation of water through helium-leak-tight graphene-based membranes
R. R. Nair, H. A. Wu, P. N. Jayaram +2
Permeation through nanometer pores is important in the design of materials for filtration and separation techniques and because of unusual fundamental behavior arising at the molec…
Strong Plasmonic Enhancement of Photovoltage in Graphene
T. J. Echtermeyer, L. Britnell, P. K. Jasnos +6
Amongst the wide spectrum of potential applications of graphene, ranging from transistors and chemical-sensors to nanoelectromechanical devices and composites, the field of photoni…
Micrometer-scale ballistic transport in encapsulated graphene at room temperature
A. S. Mayorov, R. V. Gorbachev, S. V. Morozov +8
Devices made from graphene encapsulated in hexagonal boron-nitride exhibit pronounced negative bend resistance and an anomalous Hall effect, which are a direct consequence of room-…