Hernán E. Grecco、Keith A. Lidke、Rainer Heintzmann 等 8 位作者2004-11-01Microscopy Research and Technique
In this work, we characterized streptavidin-conjugated quantum dots (QDs) manufactured by Quantum Dot Corporation. We present data on: (1) two-photon excitation; (2) fluorescence lifetimes; (3) ensemble and single QD emission anisotropy; (4) QDs as donors for Forster resonance energy transfer (FRET); and (5) spectral…
Quantum Dots Synthesis And PropertiesAdvanced Fluorescence Microscopy TechniquesAdvanced Biosensing Techniques and Applications
Wei Chen、Jin Z. Zhang、Alan G. Joly2004-11-01Journal of Nanoscience and Nanotechnology
Recent studies on the optical properties, in particular, luminescence, of a variety of doped semiconductor nanoparticles are reviewed. The effects of quantum confinement, temperature and pressure on luminescent properties are discussed. In addition, electroluminescence, cathodoluminescence, magnetoluminescence and rel…
Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesOptical properties and cooling technologies in crystalline materials
Alberto Bianco2004-11-01Expert Opinion on Drug Delivery
Functionalised carbon nanotubes (f-CNTs) are emerging as new tools in the field of nanobiotechnology and nanomedicine. This is because they can be easily manipulated and modified by encapsulation with biopolymers or by covalent linking of solubilising groups to the external walls and tips. The possibility of incorpora…
Carbon Nanotubes in CompositesNanopore and Nanochannel Transport StudiesGraphene and Nanomaterials Applications
Azzedine Bousseksou、Gábor Molnár、G.S. Matouzenko2004-11-01European Journal of Inorganic Chemistry
Abstract The spin crossover phenomenon in molecular inorganic compounds is one of the most spectacular examples of bistability phenomena leading to a switching between the high‐spin and the low‐spin states of the molecule by several means such as temperature, pressure, light and magnetic field (multi‐property molecula…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
K. John、S. Venkata Naidu2004-11-01Journal of Reinforced Plastics and Composites
The variation of tensile strength of unsaturated polyester based sisal–glass hybrid composites with fiber loading has been studied. The tensile strength of these hybrid composites has been found to be higher than that of the matrix. The effects of NaOH treatment and trimethoxy silane (coupling agent) treatment on the…
Natural Fiber Reinforced Composites
S. Mackowski、T. Gurung、H. E. Jackson 等 6 位作者2004-11-01arXiv
We study spin dynamics of excitons confined in self-assembled CdSe quantum dots by means of optical orientation in magnetic field. At zero field the exciton emission from QDs populated via LO phonon-assisted absorption shows a circular polarization of 14%. The polarization degree of the excitonic emission increases dr…
Materials Science
Kazuhide Kenmochi、Van An Dinh、Kazunori Satō 等 5 位作者2004-11-01Journal of the Physical Society of Japan
We propose materials design to fabricate a new class of diluted magnetic semiconductors (DMSs) based on MgO, SrO and BaO without magnetic elements. Replacing the oxygen atoms by other atoms such as C atoms leads to the induction of a deep-impurity band. These materials show ferromagnetic behaviour if the impurity-band…
ZnO doping and propertiesMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Christy R. Vestal、Qing Song、Z. John Zhang2004-11-01The Journal of Physical Chemistry B
The interparticle distance has been systematically varied by controlling the concentration of 8-nm CoFe 2 O 4 or MnFe 2 O 4 spinel ferrite nanocrystals dispersed in eicosane. For both nanoparticulate systems, the blocking temperature decreased with increasing interparticle distance through dilution of nanocrystals, wh…
Magnetic properties of thin filmsMagnetic Properties and Synthesis of FerritesIron oxide chemistry and applications
K. Rajendra Prasad、Norio Miura2004-11-01Applied Physics Letters
High performance pseudocapacitive characteristics of potentiodynamically deposited NiO are reported here. Three-dimensional nanowhiskers of NiO were prepared by potentiodynamically depositing nickel hydroxide on stainless steel (SS) and heating the hydroxide in air at 300°C for 3h. The scan rate used for the depositio…
Supercapacitor Materials and FabricationConducting polymers and applicationsAdvanced battery technologies research
E. S. Snow、James P. Novak、Marcus D. Lay 等 4 位作者2004-11-01Applied Physics Letters
We report the scaling behavior of 1∕f noise in single-walled carbon nanotube devices. In this study we use two-dimensional carbon nanotube networks to explore the geometric scaling of 1∕f noise and find that for devices of a given resistance the noise scales inversely with device size. We have established an empirical…
Carbon Nanotubes in CompositesGraphene research and applicationsNanopore and Nanochannel Transport Studies
Suhas S. Joshi、Shreyes N. Melkote2004-11-01Journal of Manufacturing Science and Engineering
This paper aims to explain the size-effect in the Primary Deformation Zone (PDZ) in machining using strain gradient plasticity theory. Considering a parallel-sided shear zone configuration, models are formulated for the evaluation of strain gradient, density of geometrically necessary dislocations, shear strength and…
Microstructure and mechanical propertiesMetal and Thin Film MechanicsNonlocal and gradient elasticity in micro/nano structures
M. Anni、Liberato Manna、R. Cingolani 等 6 位作者2004-11-01Applied Physics Letters
We have studied the interactions in the solid phase between a blue-light-emitting organic conjugated polymer {poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(9,ethyl-3,6-carbazole)]} and colloidal CdSe∕ZnS core shell quantum dots. We demonstrate by time resolved photoluminescence measurements that efficient Förster energ…
Perovskite Materials and ApplicationsQuantum Dots Synthesis And PropertiesOrganic Light-Emitting Diodes Research
X. Y. Zhang、Xu Zhao、Chuilin Lai 等 6 位作者2004-11-01Applied Physics Letters
We report the synthesis and characterization of ferroelectric lead zirconate titanate Pb(Zr0.53Ti0.47)O3 (PZT) nanowires. The PZT nanowires, with diameters of about 45nm and lengths of about 6μm, were fabricated by means of a sol-gel method utilizing nanochannel alumina templates. After postannealing at 700°C, the PZT…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesAnodic Oxide Films and Nanostructures
Hwan-Man Park、Xuemei Liang、Amar K. Mohanty 等 5 位作者2004-11-01Macromolecules
Biodegradable nanocomposites were successfully fabricated from cellulose acetate (CA) plasticized with triethyl citrate (TEC), and combined with Cloisite 30B organoclay, using maleic anhydride grafted cellulose acetate butyrate (CAB- g -MA) as the compatibilizer. The nanostructure of the nanocomposites was investigate…
Polymer Nanocomposites and PropertiesAdvanced Cellulose Research Studiesbiodegradable polymer synthesis and properties
Jörg Knipping、Hartmut Wiggers、Bernd Rellinghaus 等 6 位作者2004-11-01Journal of Nanoscience and Nanotechnology
The formation of pure single crystalline silicon nanoparticles by microwave induced decomposition of silane in a low pressure flow reactor is reported. The morphology and crystal structure of the particles are characterized in situ by particle mass spectrometry (PMS) and ex situ by means of X-ray diffraction, high res…
Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisSilicon Nanostructures and Photoluminescence
Atsuo Satou、Masanori Yamanaka2004-11-01arXiv
We study ground state properties of the double-exchange model on triangle chain in the classical limit on $t_{2g}$ spins. The ground state is determined by a competition among the kinetic energy of the $e_g$ electron, the antiferromagnetic exchange energy between the $t_{2g}$ spins, and frustration due to a geometric…
Materials ScienceStrongly Correlated Electrons
Xiangdong Zhang2004-11-01Physical Review B
Absolute negative refraction regions for both polarizations of electromagnetic wave in two-dimensional photonic crystal have been found through both the analysis and the exact numerical simulation. Especially, absolute all-angle negative refraction for both polarizations has also been demonstrated. Thus, the focusing…
Metamaterials and Metasurfaces ApplicationsPhotonic Crystals and ApplicationsAdvanced Antenna and Metasurface Technologies
T. A. Niehaus、M. Rohlfing、F. Della Sala 等 5 位作者2004-11-01arXiv
We present a tight-binding based GW approach for the calculation of quasiparticle energy levels in confined systems such as molecules. Key quantities in the GW formalism like the microscopic dielectric function or the screened Coulomb interaction are expressed in a minimal basis of spherically averaged atomic orbitals…
Materials Science
Nobuhisa Fujita2004-11-01Journal of the Physical Society of Japan
We present a theoretical formulation of the one-electron problem constrained on the surface of a cylindrical tubule with varying diameter. Because of the cylindrical symmetry, we may reduce the problem to a one-dimensional equation for each angular momentum quantum number $m$ along the cylindrical axis. The geometrica…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Olga L. Lazarenkova、Paul von Allmen、Fabiano Oyafuso 等 5 位作者2004-11-01Applied Physics Letters
Anharmonicity of the interatomic potential is taken into account for the quantitative simulation of the conduction and valence band offsets for strained semiconductor heterostructures. The anharmonicity leads to a weaker compressive hydrostatic strain than that obtained with the commonly used quasiharmonic approximati…
Semiconductor Quantum Structures and DevicesMetal and Thin Film MechanicsElectronic and Structural Properties of Oxides