Physics: Recent submissions
Now showing items 421-440 of 2200
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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 ... -
Graphene Based Membranes for Osmosis Applications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2020)With the discovery of two-dimensional hexagonal graphene (single layer of graphite), a tremendous interest has grown due its remarkable properties. Apart from all other properties, its superior thickness (one-atom thick) ... -
The winds of low-mass stars and solar-wind evolution
(Trinity College Dublin. School of Physics. Discipline of Physics, 2020)Stellar winds affect the evolution of stars (as well as impacting the planets orbiting these stars) through the removal of angular momentum and mass over time. This process changes the rotation rate of the host star, which ... -
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 ... -
Collisional Broadening of Semiconductor Microcavity Polaritons
(2002)We measure the effect of intensity on the homogeneous linewidth of two high finesse semiconductor microcavities in the strong coupling regime using degenerate four‐wave mixing. We find that the collisional broadening due ...
