Physics (Scholarly Publications): Recent submissions
Now showing items 281-300 of 1742
-
All-printed dielectric capacitors from high permittivity, liquid-exfoliated BiOCl nanosheets
(2020)Printed networks of insulating 2D materials are promising for dielectric applications in printed electronic devices. However, this work has not really progressed beyond networks of BN nanosheets displaying dielectric ... -
On the relationship between morphology and conductivity in nanosheet networks
(2021)It is well-known that the morphology of nanostructured networks is closely linked to network properties. However, controlling and characterizing the morphology of networks of 2D nanosheets has not been explored. In this ... -
Using chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodes
(2020)For battery electrodes, measured capacity decays as charge/discharge current is increased. Such rate-performance is usually characterised via galvanostatic charge-discharge measurements, experiments which are very slow, ... -
Effect of the Gate Volume on the Performance of Printed Nanosheet Network-Based Transistors
(2020)Demonstration of high-performance, all-printed transistors fabricated only from networks of two-dimensional nanosheets would represent a significant advance in printed electronics. However, such devices have only been shown ... -
Developing models to fit capacity-rate data in battery systems
(2020)Analyzing rate performance data in battery electrodes is greatly facilitated by access to simple analytical models. Here, we describe a number of simple equations for fitting capacity–rate data. These equations output fit ... -
Liquid phase exfoliation of GeS nanosheets in ambient conditions for lithium ion battery applications
(2020)The propensity of many 2D materials to oxidize in ambient conditions can complicate production and limit applications potential. Here we describe ambient liquid phase exfoliation of GeS, a layered material known for its ... -
The Rate Performance of Two-Dimensional Material-Based Battery Electrodes May Not Be as Good as Commonly Believed
(2020)Two-dimensional (2D) materials show great potential for use in battery electrodes and are believed to be particularly promising for high-rate applications. However, there does not seem to be much hard evidence for the ... -
Production of Quasi-2D Platelets of Non-Layered Iron Pyrite (FeS2) by Liquid-Phase Exfoliation for High Performance Battery Electrodes
(2020)Over the last fifteen years, two-dimensional (2D) materials have been studied and exploited for many applications. In many cases, 2D materials are formed by the exfoliation of layered crystals such as transition-metal ... -
Quantifying the Effect of Electronic Conductivity on the Rate Performance of Nanocomposite Battery Electrodes
(2020)While it is well-known that the electronic conductivity of electrodes has a critical impact on rate performance in batteries, this relationship has been quantified only by computer simulations. Here we investigate the ... -
The energy of fcc and hcp foams
(2020)We present Surface Evolver evaluations of the difference in energy between face-centred cubic (fcc) and hexagonal close-packed (hcp) foams in the usual idealized model, for liquid fractions ranging from the dry to the wet ... -
Controlling the resistive switching hysteresis in VO2 thin films via application of pulsed voltage
(2020)We investigate the origin of the variation in resistive switching hysteresis of VO2 thin films. Using pulsed electrical measurements in textured VO2 thin film devices, we show that the hysteresis observed in I–V curves ... -
Buckling of a linear chain of hard spheres in a harmonic confining potential: Numerical and analytical results for low and high compression
(2020)We extend a previous analysis of the buckling properties of a linear chain of hard spheres between hard walls under transverse harmonic confinement. Two regimes are distinguished—low compression, for which the entire chain ... -
Dispersion monitoring for high-speed WDM networks via two-photon absorption in a semiconductor microcavity
(2006)Due to the continued demand for bandwidth, network operators have to increase the data rates at which individual wavelengths operate at. As these data rates will exceed 100 Gbit/s in the next 5-10 years, it will be crucial ... -
Impact on structural, optical and electrical properties of CuCl by incorporation of Zn for n-type doping
(2006)γ-CuCl is a wide-band gap (Eg = 3.395eV at 4 K) , direct band gap, semiconductor material with a cubic zincblende lattice structure. A very large exciton binding energy (190 meV), assures efficient exciton-based emission ... -
Characterisation of n-type γ-CuCl on Si for UV optoelectronic applications
(2007)The use of co-evaporation of ZnCl2 with CuCl in order to achieve n-type conductivity in CuCl is reported herein. Linear current–voltage (IV) characteristics in the range of ±4 V have been measured using Cu–Au electrical ... -
Encapsulation of the heteroepitaxial growth of wide band gap γ-CuCl on silicon substrates
(2006)γ-CuCl semiconductor material has been identified as a candidate material for the fabrication of blue-UV optoelectronic devices on Si substrates due to its outstanding electronic, lattice and optical properties. However, ... -
Chromatic dispersion monitoring of 80 Gbps OTDM data signal via two-photon absorption in a semiconductor microcavity
(2007)In this letter, a novel method of chromatic dispersion monitoring via two-photon absorption (TPA) is investigated. A specially designed semiconductor microcavity is employed as a TPA detector for monitoring ... -
3.8 dB Noise figure in bulk semiconductor optical amplifier
(2013)The present paper reports numerical and experimental investigation of noise figure of a multi-section semiconductor optical amplifier. The designed amplifier shows a 3.8dB noise figure, which seems to be the lowest figure ... -
Two-photon induced photoconductivity enhancement in semiconductor microcavities: a theoretical investigation
(2002)We describe a detailed theoretical investigation of two-photon absorption photoconductivity in semiconductor microcavities. We show that high enhancement (by a factor of >10,000) of the nonlinear response can be obtained ...
