489 citations · 2.3k across the 39 of their papers we have counts for
17 papers · 1 filter
Probing the nanoscale origin of strain and doping in graphene-hBN heterostructures
Tom Vincent, Vishal Panchal, Tim Booth +4
We use confocal Raman microscopy and modified vector analysis methods to investigate the nanoscale origin of strain and carrier concentration in exfoliated graphene-hexagonal boron…
Infrared-to-violet tunable optical activity in atomic films of GaSe, InSe, and their heterostructures
Daniel J. Terry, Viktor Zólyomi, Matthew Hamer +11
Two-dimensional semiconductors - atomic layers of materials with covalent intra-layer bonding and weak (van der Waals or quadrupole) coupling between the layers - are a new class o…
Detection of ultra-low concentration NO2 in complex environment using epitaxial graphene sensors
Christos Melios, Vishal Panchal, Kieran Edmonds +3
We demonstrate proof-of-concept graphene sensors for environmental monitoring of ultra-low concentration NO2 in complex environments. Robust detection in a wide range of NO2 concen…
Wide-Band Nano-Imaging of Plasmon Dispersion and Hotspots in Quasi-Free-Standing Epitaxial Graphene
William S. Hart, Vishal Panchal, Christos Melios +3
We report observation of graphene plasmon interference fringes across a wide spectral range using a scattering scanning near-field optical microscope (s-SNOM) that employs a widely…
Modeling of graphene Hall effect sensors for microbead detection
A. Manzin, E. Simonetto, G. Amato +2
This paper deals with the modeling of sensitivity of epitaxial graphene Hall bars, from sub-micrometer to micrometer size, to the stray field generated by a magnetic microbead. To…
Unique excitonic effects in tungsten disulphide monolayers on two-layer graphene
Cristina E. Giusca, Ivan Rungger, Vishal Panchal +8
Light emission in atomically thin heterostructures is known to depend on the type of materials, number and stacking sequence of the constituent layers. Here we show that the thickn…
Thickness dependent hydrophobicity of epitaxial graphene
M. Munz, C. E. Giusca, R. L. Myers-Ward +2
This article addresses the much debated question whether the degree of hydrophobicity of single-layer graphene (1LG) is different from the one of double-layer graphene (2LG). Knowl…
Water affinity to epitaxial graphene: the impact of layer thickness
Cristina E. Giusca, Vishal Panchal, Martin Munz +5
The sensitivity to water of epitaxial graphene is examined in this study.
Role of substrate on interaction of water molecules with graphene oxide and reduced graphene oxide
Roman Strzelczyk, Cristina E. Giusca, Francesco Perrozzi +3
We study local electronic properties of graphene oxide (GO) and reduced graphene oxide (RGO) on metallic (Pt) and insulating (Si3N4) substrates in controlled humidity environment.…
Correlation of structural, nanomechanical and electrostatic properties of single and few-layers MoS2
Benjamin J. Robinson, Cristina E. Giusca, Yurema Teijeiro Gonzalez +3
We have decoupled the intrinsic optical and electrostatic effects arising in monolayer and few-layer molybdenum disulphide from those influenced by the flake-substrate interaction.
Water on graphene: Review of recent progress
Christos Melios, Cristina E. Giusca, Vishal Panchal +1
The sensitivity of graphene to the surrounding environment is given by its π electrons, which are directly exposed to molecules in the ambient. The high sensitivity of graphene to…
Tuning epitaxial graphene sensitivity to water by hydrogen intercalation
Christos Melios, Michael Winters, Wlodek Strupinski +6
The effects of humidity on the electronic properties of quasi-free standing one layer graphene (QFS 1LG) are investigated via simultaneous magneto-transport in the van der Pauw geo…
Visualisation of edge effects in side-gated graphene nanodevices
Vishal Panchal, Arseniy Lartsev, Alessandra Manzin +3
Using local scanning electrical techniques we study edge effects in side-gated Hall nanodevices made of epitaxial graphene. We demonstrate that lithographically defined edges of th…
Calibration of multi-layered probes with low/high magnetic moments
Vishal Panchal, Hector Corte-Leon, Boris Gribkov +7
We present a comprehensive method for visualisation and quantification of the magnetic stray field of magnetic force microscopy (MFM) probes, applied to the particular case of cust…
Current Controlled Magnetization Switching in Cylindrical Nanowires for High-Density 3D Memory Applications
Hanan Mohammed, Hector Corte-León, Yurii P. Ivanov +7
A next-generation memory device utilizing a three-dimensional nanowire system requires the reliable control of domain wall motion. In this letter, domain walls are studied in cylin…
Confocal laser scanning microscopy: A tool for rapid optical characterization of 2D materials
Vishal Panchal, Yanfei Yang, Guangjun Cheng +9
Confocal laser scanning microscopy (CLSM) is a non-destructive, highly-efficient optical characterization method for large-area analysis of graphene on different substrates, which…
Magnetic Force Microscopy Imaging Using Geometrically Constrained Nano-Domain Walls
Héctor Corte-León, Luis Alfredo Rodríguez, Matteo Pancaldi +5
Domain wall probes (DW-probes) were custom-made by modifying standard commercial magnetic force microscopy (MFM) probes using focused ion beam lithography. Excess of magnetic coati…