Browsing Physics (Scholarly Publications) by Title
Now showing items 1272-1291 of 1675
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Radial oscillations of local density of states in carbon nanotubes
(2001)By performing an analytical study of the electronic structure of metallic carbon nanotubes, we show that the local density of states exhibits well-defined oscillations as a function of the nanotube radius. The periods ... -
Radiation-pressure-induced mode splitting in a spherical microcavity
(2007)In this work, we present a novel method to reveal azimuthal whispering gallery modes (WGMs) in a spherical microcavity coated with a nano-meter thick polyelectrolyte shell and one monolayer of CdTe semiconductor quantum ... -
Raman scattering and Anti-Stokes emission from a single spherical microcavity with a CdTe quantum dot monolayer
(American Institute of Physics, 2003)We have studied the Raman and luminescence spectra of a microcavity?quantum dot system consisting of a melamine formaldehyde latex microsphere coated by CdTe colloidal quantum dots. The cavity-induced enhancement of the ... -
Raman spectra of p-type transparent semiconducting Cr<inf>2</inf>O<inf>3</inf>:Mg
(2015)Abstract We present an analysis of the Raman spectra of p-type transparent conducting Cr2O3:Mg grown by various techniques including spray pyrolysis, pulsed laser deposition, molecular beam epitaxy and reactive magnetron ... -
Raman spectroscopy and conductivity measurements on polymer-multiwalled carbon nanotubes composites
(2002)Thin films of poly(methyl methacrylate)?multiwalled nanotubes composites were produced by spin coating using different nanotube concentrations. The materials were characterized by scanning electron microscopy, energy-dispersive ... -
Raman spectroscopy of ferromagnetic CrO2
(American Physical Society, 1999)Polarized Raman spectra of the ferromagnetic metal CrO2 were measured in a broad temperature range including Tc'390 K. The Raman-allowed modes of A1g , B1g , B2g , and Eg symmetry were identified and compared to the ... -
Raman study of phonon modes in bismuth pyrochlores
(2010)The Raman spectra of the cubic bismuth pyrochlores Bi3/2Zn0.92Nb3/2O6.92, Bi3/2ZnTa3/2O7, Bi3/2MgNb3/2O7, and Bi3/2MgTa3/2O7 have been measured at room temperature. The frequencies of the Raman modes, obtained from ... -
Rapid and Reliable Calibration of Laser Beam Deflection System for Microcantilever-Based Sensor Setups
(2012)Cantilever array-based sensor devices widely utilise the laser-based optical deflection method for measuring static cantilever deflections mostly with home-built devices with individual geometries. In contrast to scanning ... -
Rare-earth-free noncollinear metallic ferrimagnets Mn4-xZxN with compensation at room temperature
(2022)Compensated ferrimagnets show no net magnetization like antiferromagnets, but their transport and magneto-optic properties resemble those of ferromagnets, thereby creating opportunities for applications in high-frequency ... -
The rate performance of 2D material based battery electrodes may not be as good as is 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 ... -
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 ... -
Reactive Plasma N-Doping of Amorphous Carbon Electrodes: Decoupling Disorder and Chemical Effects on Capacitive and Electrocatalytic Performance
(2020)Nitrogen-free amorphous carbon thin films prepared via sputtering followed by graphitization, were used as precursor materials for the creation of N-doped carbon electrodes with varying degrees of amorphization. Incorporation ... -
Reactivity of transition-metal alloys to oxygen and sulfur
(2021)Oxidation and tarnishing are the two most common initial steps in the corrosive process of metals at ambient conditions. These are always initiated with O and S binding to a metallic surface, so that one can use the ... -
RealTime Mass Sensing by Nanomechanical Resonatorsin Fluid
(2004)We have developed a sensitive method for real-time mass sensing in a fluid using a microfabricated array of nanomechanical cantilevers actuated at their resonance frequencies. The sensor platform consists of a streptavidin ... -
Rearrangement and elimination of ordered surface layers of crystalline bubble structures due to gas diffusion
(Royal Society of Chemistry, 2009)We describe a hitherto unknown self-organising effect in wet crystalline bubble structures exposed to air. Due to the escape of gas from the bubbles in the top surface layer, bubbles shrink and create space for the bubbles ... -
Rearrangement and elimination of ordered surface layers of crystalline bubble structures due to gas diffusion
(2009)We describe a hitherto unknown self-organising effect in wet crystalline bubble structures exposed to air. Due to the escape of gas from the bubbles in the top surface layer, bubbles shrink and create space for the bubbles ... -
Reduced low frequency noise in electron beam evaporated MgO magnetic tunnel junctions
(2010)We compare low frequency noise in magnetic tunnel junctions with MgO barriers prepared by electron-beam evaporation with those prepared by radiofrequency sputtering, both showing a high tunneling magnetoresistance. The ... -
Reexamination of magnetic isotope and field effects on adenosine triphosphate production by creatine kinase
(2012)The influence of isotopically enriched magnesium on the creatine kinase catalyzed phosphorylation of adenosine diphosphate is examined in two independent series of experiments where adenosine triphosphate (ATP) concentrations ... -
Reflectance anisotropy spectroscopy of Fe3O4(110): Anisotropic strain
(2018)We present a study of (110)-terminated magnetite using a range of surface-sensitive techniques, the foremost of those being reflectance anisotropy spectroscopy (RAS). The anisotropic optical response of the as-polished and ... -
Reflectance anisotropy spectroscopy of magnetite (110) surfaces
(2014)Reflectance anisotropy spectroscopy (RAS) has been used to measure the optical anisotropies of bulk and thin-film Fe3O4(110) surfaces. The spectra indicate that small shifts in energy of the optical transitions, ...
