Physics (Scholarly Publications): Recent submissions
Now showing items 421-440 of 1742
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Broadband saturable absorption and exciton-exciton annihilation in MoSe2 composite thin films
(2019)Polyvinyl alcohol (PVA) was utilized as a matrix to host two-dimensional (2D) liquid-phase-exfoliated MoSe2 nanosheets. These 2D MoSe2/PVA composite thin films were experimentally proven to be preferable for efficient ... -
CMOS-compatible multi-band plasmonic TE-pass polarizer
(2018)A CMOS-compatible plasmonic TE-pass polarizer capable of working in the O, E, S, C, L, and U bands is numerically analyzed. The device is based on an integrated hybrid plasmonic waveguide (HPW) with a segmented metal design. ... -
Photoresponsivity enhancement in monolayer MoS<inf>2</inf> by rapid O<inf>2</inf>:Ar plasma treatment
(2019)We report up to ten-fold enhancement of the photoresponsivity of monolayer molybdenum disulfide (MoS2) by treatment with O2:Ar (1:3) plasma. We characterize the surface of plasma-exposed MoS2 by TEM, Raman, and PL mapping ... -
The Electro-Optical Performance of Silver Nanowire Networks
(2019)Networks of metallic nanowires have the potential to meet the needs of next-generation device technologies that require flexible transparent conductors. At present, there does not exist a first principles model capable of ... -
A comparison of He and Ne FIB imaging of cracks in microindented silicon nitride
(2018)Helium ion microscopy (HIM) offers potential as a high spatial resolution technique for imaging insulating samples that are susceptible to charging artifacts. In this study helium and neon ion microscopy are used to image ... -
Suppression of the Shear Raman Mode in Defective Bilayer MoS2
(2019)We investigate the effects of lattice disorders on the low frequency Raman spectra of bilayer MoS 2. The bilayer MoS 2 was subjected to defect engineering by irradiation with a 30 keV He + ion beam, and the induced morphology ... -
CMEs in the Heliosphere: II. A Statistical Analysis of the Kinematic Properties Derived from Single-Spacecraft Geometrical Modelling Techniques Applied to CMEs Detected in the Heliosphere from 2007 to 2017 by STEREO/HI-1
(2019)Recent observations with the Heliospheric Imagers (HIs) onboard the twin NASA Solar Terrestrial Relations Observatory (STEREO) spacecraft have provided unprecedented observations of a large number of coronal mass ejections ... -
Loss-cone instability modulation due to a magnetohydrodynamic sausage mode oscillation in the solar corona
(2019)Solar flares often involve the acceleration of particles to relativistic energies and the generation of high-intensity bursts of radio emission. In some cases, the radio bursts can show periodic or quasiperiodic intensity ... -
Surface modification on MoO2+x/Mo(110) induced by a local electric potential
(2019)Oxygen adatoms on the MoO2+x/Mo(110) surface are observed to be removed when a sufficiently large bias is applied between the scanning tunneling microscope tip and the surface. Experimental observations, such as the bias ... -
Novel polarization beam splitter with high fabrication tolerance
(2018)A highly fabrication tolerant polarization beam splitter is presented. The fabrication tolerances are relaxed by adjusting two voltages. Experiments show on-chip losses of 3.5 dB and extinction ratio of 15 dB at C-band -
Plasmonic Colour Printing by Light Trapping in Two-Metal Nanostructures
(MDPI, 2019)Structural colour generation by nanoscale plasmonic structures is of major interest for non-bleaching colour printing, anti-counterfeit measures and decoration applications. We explore the physics of a two-metal plasmonic ... -
Implementation of Morse-Witten theory for a polydisperse wet 2D foam simulation
(Taylor & Francis, 2019-06)The Morse–Witten theory provides a formulation for the inter-bubble forces and corresponding deformations in a liquid foam, accurate in the limit of high liquid fraction. Here we show how the theory may be applied in ... -
The Effect of Network Formation on the Mechanical Properties of 1D:2D Nano:Nano Composites
(2018)Mixtures of 1D carbon nanotubes and 2D nanosheets are important in electrochemical applications where the nanosheets are the active material, while the nanotubes provide electrical conductivity and mechanical reinforcement. ... -
Exfoliation of 2D materials by high shear mixing
(2019)While it has been demonstrated that large scale liquid exfoliation of graphene is possible using high-shear exfoliation, it has not yet been shown to be applicable to a broader range of layered materials. In addition, it ... -
Liquid phase exfoliation of carbonate-intercalated layered double hydroxides
(2019)Direct exfoliation of a carbonate layered double hydroxide (LDH) has been achieved by using a novel horn-probe sonic tip, avoiding the development of time-consuming anion-exchange reactions. The most suitable solvents were ... -
High Areal Capacity Battery Electrodes Enabled by Segregated Nanotube Networks
(2019)Increasing the energy storage capability of lithium-ion batteries necessitates maximization of their areal capacity. This requires thick electrodes performing at near-theoretical specific capacity. However, achievable ... -
Solvent exfoliation stabilizes TiS2 nanosheets against oxidation, facilitating lithium storage applications
(2019)Titanium disulfide is a promising material for a range of applications, including lithium-ion battery (LIB) anodes. However, its application potential has been severely hindered by the tendency of exfoliated TiS2 to rapidly ... -
Non-resonant light scattering in dispersions of 2D nanosheets
(2018)Extinction spectra of nanomaterial suspensions can be dominated by light scattering, hampering quantitative spectral analysis. No simple models exist for the wavelength-dependence of the scattering coefficients in suspensions ... -
Percolation Effects in Electrolytically Gated WS <inf>2</inf> /Graphene Nano:Nano Composites
(2019)Mixed networks of conducting and non-conducting nanoparticles show promise in a range of applications where fast charge transport is important. While the dependence of network conductivity on the conductive mass fraction ...
