A5009695160- 2D Materials and Applications
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Graphene research and applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Gas Sensing Nanomaterials and Sensors
- Molecular Junctions and Nanostructures
- Quantum and electron transport phenomena
- Organic Electronics and Photovoltaics
- Topological Materials and Phenomena
- Gold and Silver Nanoparticles Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Surface and Thin Film Phenomena
- Sensor Technology and Measurement Systems
- Copper-based nanomaterials and applications
- MXene and MAX Phase Materials
- Physics of Superconductivity and Magnetism
- Advanced Sensor and Energy Harvesting Materials
Henry Royce Institute
2020-2024
University of Manchester
2015-2024
University of Sheffield
2010-2015
High broad-band photoresponsivity of mechanically formed InSe–graphene van der Waals heterostructures is achieved by exploiting the transparency graphene, direct bandgap InSe, and favorable band line up InSe with graphene. The exceeds that for other spectral response extends from near-infrared to visible spectrum. development (vdW) fabricated stacking 2D crystals has led discovery fundamental physical phenomena realization functional devices ranging sensitive phototransistors tunnel...
Extensive efforts have been undertaken to combine superconductivity and the quantum Hall effect so that Cooper-pair transport between superconducting electrodes in Josephson junctions is mediated by one-dimensional edge states. This interest has motivated prospects of finding new physics, including topologically-protected quasiparticles, but also extends into metrology device applications. So far it proven challenging achieve detectable supercurrents through conductors. Here we show domain...
Recent developments in fabrication of van der Waals heterostructures enable new type devices assembled by stacking atomically thin layers two-dimensional materials. Using this approach, we fabricate light-emitting based on a monolayer WSe2, and also comprising boron nitride tunnelling barriers graphene electrodes, observe sharp luminescence spectra from individual defects WSe2 under both optical electrical excitation. This paves the way towards realisation electrically-pumped quantum...
We experimentally demonstrate the creation of defects in monolayer WSe2 via nanopillar imprinting and helium ion irradiation. Based on first method, we realize atomically thin vertical tunneling light-emitting diodes based monolayers hosting quantum emitters at deterministically specified locations. characterize these by investigating evolution their emission spectra external electric magnetic fields, as well inducing electroluminescence low temperatures. identify qualitatively different...
The availability of accessible fabrication methods based on deterministic transfer atomically thin crystals has been essential for the rapid expansion research into van der Waals heterostructures. An inherent issue these techniques is deformation polymer carrier film during transfer, which can lead to highly nonuniform strain induced in transferred two-dimensional material. Here, using a combination optical spectroscopy, atomic force, and Kelvin probe force microscopy, we show that presence...
The use of the water-oil interface provides significant advantages in synthesis inorganic nanostructures. Employing water-toluene interface, luminescent CdS nanocrystals have been obtained at a relatively modest temperature 35 degrees C. diameters particulates can be varied between 1.0 and 5.0 nm. In addition, we devised new method for transferring thin films onto solid substrates. Using this method, consisting Au Ag spread over very large areas (square centimetres) are single step. These...
Abstract Bandstructure engineering using alloying is widely utilized for achieving optimized performance in modern semiconductor devices. While has been studied monolayer transition metal dichalcogenides, its application van der Waals heterostructures built from atomically thin layers largely unexplored. Here, heterobilayers made monolayers of WSe 2 (or MoSe ) and Mo x W 1 − Se alloy are fabricated nontrivial tuning the resultant bandstructure observed as a function concentration . This...
Abstract. The presence of multiple independent sensing parameters in a single device is the key conceptual advantage sensor devices based on an organic thin film transistor (OTFT) over simple chemiresistors. Practically, however, these must first be extracted from electrical characteristics OTFTs and, thus, they are not immediately apparent. To exploit OTFT sensors, we require measurement technology to extract real time. Here, introduce efficient, cost-effective system that faster and more...
Bandstructure engineering using alloying is widely utilised for achieving optimised performance in modern semiconductor devices. While has been studied monolayer transition metal dichalcogenides, its application van der Waals heterostructures built from atomically thin layers largely unexplored. Here, we fabricate heterobilayers made monolayers of WSe$_2$ (or MoSe$_2$) and Mo$_x$W$_{1-x}$Se$_2$ alloy observe nontrivial tuning the resultant bandstructure as a function concentration $x$. We...