155 citations · 428 across the 14 of their papers we have counts for
15 papers
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…
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…
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.
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…
Atmospheric doping effects in epitaxial graphene: correlation of local and global electrical measurements
Vishal Panchal, Cristina E. Giusca, Arseniy Lartsev +5
We directly correlate the local (20-nm scale) and global electronic properties of a device containing mono-, bi- and tri-layer epitaxial graphene (EG) domains on 6H-SiC(0001) by si…
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…
Rapid characterization of wafer-scale 2D material: Epitaxial graphene and graphene nanoribbons on SiC
Vishal Panchal, Yanfei Yang, Guangjun Cheng +8
We demonstrate that the confocal laser scanning microscopy (CLSM) provides a non-destructive, highly-efficient characterization method for large-area epitaxial graphene and graphen…
Observation of Coulomb blockade in nanostructured epitaxial bilayer graphene on SiC
Cassandra Chua, Arseniy Lartsev, Jinggao Sui +9
We study electron transport in nanostructures patterned in bilayer graphene patches grown epitaxially on SiC as a function of doping, magnetic field, and temperature. Away from cha…
Standardization of surface potential measurements of graphene domains
Vishal Panchal, Ruth Pearce, Rositza Yakimova +2
We compare the three most commonly used scanning probe techniques to obtain a reliable value of the work function in graphene domains of different thickness. The surface potential…