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Electronic decoupling of graphene from metallic and semiconducting substrates via intercalation of different species is one of the widely used approaches in studies of graphene. In the present work the modification of the electronic and…

Materials Science · Physics 2021-12-24 Yong Zhou , Roman Ovcharenko , Beate Paulus , Yuriy Dedkov , Elena Voloshina

We report experimentally and theoretically the behavior of freestanding graphene subject to bombardment of energetic ions, investigating the ability of large-scale patterning of freestanding graphene with nanometer sized features by focused…

Mesoscale and Nanoscale Physics · Physics 2016-05-04 Jakob Buchheim , Roman M. Wyss , Ivan Shorubalko , Hyung Gyu Park

In this work, we investigate $CO_{2}$ activation on ZnS using Near Ambient-Pressure X-ray photoelectron spectroscopy measurements (NAP-XPS) and density functional theory calculations (DFT). Our NAP-XPS experiments reveal that $CO_{2}$…

Materials Science · Physics 2026-01-21 P. R. A de Oliveira , P. Venezuela , F. Stavale , J. A. Boscoboinik

Because of high surface area and combination of various functional groups, graphene oxide (GO) is currently one of the most actively studying materials for electroanalytical applications. Self-supported GO is not practical enough to be…

The layer stacking morphology in nanocarbons is paramount for achieving new properties and outperforming applications. Here, we demonstrate that graphene quantum dots (GQDs) retain crystallinity and a stacking structure from CVD graphene…

High-dose irradiation of nanostructures consisting of multiple graphene shells, such as spherical 'carbon onions' (CO) or cylindrical multi-walled carbon nanotubes (MWNT), induces shell shrinkage by bond reconstruction around…

Mesoscale and Nanoscale Physics · Physics 2010-11-24 Michael Zaiser , Stefan Chartier

The influence of hydrated cation-{\pi} interaction forces on the adsorption and filtration capabilities of graphene-based membrane materials is significant. However, the lack of interaction potential between hydrated Cs+ and graphene limits…

Computational Physics · Physics 2024-12-02 Yangjun Qin , Liuhua Mu , Xiao Wan , Zhicheng Zong , Tianhao Li , Nuo Yang

Monolayer graphene has been grown on crystallized Cu (111) films on standard oxidized Si 100 mm wafers. The monolayer graphene demonstrates high uniformity (>97% coverage), with immeasurable defects (>95% defect-negligible) across the…

We report a new method for quantitative estimation of graphene layer thicknesses using high contrast imaging of graphene films on insulating substrates with a scanning electron microscope. By detecting the attenuation of secondary electrons…

Mesoscale and Nanoscale Physics · Physics 2012-03-28 Vidya Kochat , Atindra Nath Pal , Sneha E. S. , Arjun B. S. , Anshita Gairola , S. A. Shivashankar , Srinivasan Raghavan , Arindam Ghosh

Graphene oxide (GO) holds significant promise for electronic devices and nanocomposite materials. A number of models were proposed for GO structure, combining carboxyl, hydroxyl, carbonyl and epoxide groups at different locations. The…

Materials Science · Physics 2015-10-28 Vitaly V. Chaban , Oleg V. Prezhdo

Silicene, germanene and stanene likely to graphene are atomic thick material with interesting properties. We employed first-principles density functional theory (DFT) calculations to investigate and compare the interaction of Na or Li ions…

Materials Science · Physics 2017-04-17 B Mortazavi , A Dianat , G Cuniberti , T Rabczuk

The van-der-Waals stacking technique enables the fabrication of heterostructures, where two conducting layers are atomically close. In this case, the finite layer thickness matters for the interlayer electrostatic coupling. Here we…

We observe that gold atoms deposited by physical vapor deposition onto few layer graphenes condense upon annealing to form nanoparticles with an average diameter that is determined by the graphene film thickness. The data are well described…

Mesoscale and Nanoscale Physics · Physics 2015-05-18 Zhengtang Luo , Luke A. Somers , Yaping Dan , Thomas Ly , Nicholas J. Kybert , E. J. Mele , A. T. Charlie Johnson

Despite having outstanding electrical properties, graphene is unsuitable for optical devices because of its zero band gap. Here, we report two-dimensional excitonic photoluminescence (PL) from graphene grown on Cu(111) surface, which shows…

With a view towards optimizing gas storage and separation in crystalline and disordered nanoporous carbon-based materials, we use ab initio density functional theory calculations to explore the effect of chemical functionalization on gas…

With the help of the recently developed SIESTA-PEXSI method [J. Phys.: Condens. Matter \textbf{26}, 305503 (2014)], we perform Kohn-Sham density functional theory (DFT) calculations to study the stability and electronic structure of…

Materials Science · Physics 2014-12-03 Wei Hu , Lin Lin , Chao Yang , Jinlong Yang

We perform a density functional theory study of the effects of oxygen adsorption on the structural and electronic properties of Gr/Co(0001) and Gr/Co/Ir(111) interfaces. In both interfaces, the graphene-Co distance increases with increasing…

Materials Science · Physics 2022-08-05 Dario A. Leon , Andrea Ferretti , Daniele Varsano , Elisa Molinari , Claudia Cardoso

A 200 mm processing platform for the large-scale production of graphene field-effect transistor-quantum dot (GFET-QD) hybrid photodetectors is demonstrated. Comprehensive statistical analysis of electric data shows a high yield (96%) and…

The formation of graphene on the SiC(000-1) surface (the C-face of the {0001} surfaces) has been studied, utilizing both disilane and neon environments. In both cases, the interface between the graphene and the SiC is found to be different…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 Guowei He , N. Srivastava , R. M. Feenstra

Nano oils comprising Graphene nanoflakes and CNTs have been experimentally observed for the first time to exhibit augmented dielectric breakdown strengths compared to the base transformer oils. Variant nano oils comprising different Gr and…

Mesoscale and Nanoscale Physics · Physics 2016-11-17 Purbarun Dhar , Ajay Katiyar , Lakshmi Sirisha Maganti , Arvind Pattamatta , Sarit K Das