A. S. Alexandrov、A. M. Bratkovsky2006-04-10arXiv
It is shown that the ``hysteresis'' in a polaron model of electron transport through the molecule found by M.Galperin et al. [Nano Lett. 5, 125 (2005)] is an artefact of their ``mean-field'' approximation. The reason is trivial: after illegitimate replacement $\hat{n}^{2}=\hat{n}n_{0},$ where \hat{n} is the electron n…
Materials ScienceSoft Condensed Matter
Daniel E. Gómez、Joel van Embden、Paul Mulvaney2006-04-10Applied Physics Letters
We have explored the influence of different matrices on the emission line shape of individual homogeneously coated CdSe∕CdS∕ZnS nanocrystals. The results obtained corroborate previous observations of a correlation between blinking events and spectral diffusion, but in addition we have found that the extent of spectral…
Silicon Nanostructures and PhotoluminescenceThin-Film Transistor TechnologiesQuantum Dots Synthesis And Properties
Michael C. Ricci、Steven M. Anlage2006-04-10arXiv
We investigate the microwave electrodynamic properties of a single superconducting thin film split-ring resonator (SRR). The experiments were performed in an all-Nb waveguide, with Nb wires and Nb SRRs. Transmission data showed a high-Q stopband for a single Nb SRR ($Q \sim 4.5\times10^4$ at 4.2 K) below $T_c$, and no…
cond-mat.otherMaterials ScienceSuperconductivity
Feizhou He、B. O. Wells2006-04-10Applied Physics Letters
We have investigated the out-of-plane lattice strain related to the ferroelectric transitions in epitaxial BaTiO3 (BTO) films using synchrotron x-ray diffraction. Under either compressive strain or tensile strain, there is evidence for two structural phase transitions as a function of temperature. The transition tempe…
Ferroelectric and Piezoelectric MaterialsPhotorefractive and Nonlinear OpticsChemical and Physical Properties of Materials
O. V. Usatenko、S. S. Melnik、V. A. Yampol'skii 等 6 位作者2006-04-10arXiv
The stationary one-dimensional tight-binding Schredinger equation with a weak diagonal long-range correlated disorder in the potential is studied. An algorithm for constructing the discrete binary on-site potential exhibiting a hybrid spectrum with three different spectral components (absolutely continuous, singular c…
cond-mat.dis-nnMaterials Science
Pei Feng、J. Y. Zhang、Q. H. Li 等 4 位作者2006-04-10Applied Physics Letters
Individual β-Ga2O3 nanowires as solar-blind photodetectors are investigated. The detectors show encouraging advantages to 254nm light. The dark current is on the order of pA. The conductance of the nanowire increases by about three orders of magnitude under 254nm ultraviolet illumination. The upper limits of the respo…
Ga2O3 and related materialsAdvanced Photocatalysis TechniquesZnO doping and properties
Lihong Liang、Baowen Li2006-04-10Physical Review B
We study the size dependence of thermal conductivity in nanoscale semiconducting systems. An analytical formula including the surface scattering and the size confinement effects of phonon transport is derived. The theoretical formula gives good agreements with the existing experimental data for Si and $\mathrm{GaAs}$…
Nanowire Synthesis and ApplicationsThermal Radiation and Cooling TechnologiesThermal properties of materials
B. Bogdanović、Michael Felderhoff、A. Pommerin 等 5 位作者2006-04-10Advanced Materials
The most favorable dopants for solid-state hydrogen-storage materials are still considered to be compounds of titanium in spite of intensive research on other catalysts. Here, we show that NaAlH4 doped with ScCl3 is a highly efficient dopant, both with respect to storage capacity and kinetics: 2 mol % ScCl3 exhibits a…
Ammonia Synthesis and Nitrogen ReductionHydrogen Storage and MaterialsHybrid Renewable Energy Systems
Hyeok Choi、A. C. Sofranko、D.D. Dionysiou2006-04-10OpenAlex
Abstract A novel sol–gel dip‐coating process to fabricate nanocrystalline TiO 2 photocatalytic membranes with a robust hierarchical mesoporous multilayer and improved performance has been studied. Various titania sols containing poly(oxyethylenesorbitan monooleate) (Tween 80) surfactant as a pore‐directing agent to ta…
Mesoporous Materials and CatalysisTiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis Techniques
Johannes A. A. W. Elemans、R. van Hameren、Roeland J. M. Nolte 等 4 位作者2006-04-10OpenAlex
Abstract Porphyrins, phthalocyanines, and perylenes are compounds with great potential for serving as components of molecular materials that possess unique electronic, magnetic and photophysical properties. In general, a highly specific communication between a large number of these chromophores is required in order to…
Supramolecular Self-Assembly in MaterialsPorphyrin and Phthalocyanine ChemistrySurface Chemistry and Catalysis
Jens Lienig2006-04-09OpenAlex
Electromigration is increasingly relevant to the physical design of electronic circuits. It is caused by excessive current density stress in the interconnect. The ongoing reduction of circuit feature sizes has aggravated the problem over the last couple of years. It is therefore an important reliability issue to consi…
Semiconductor materials and devicesElectronic Packaging and Soldering TechnologiesCopper Interconnects and Reliability
I. M. Yurin2006-04-09arXiv
A previously considered model interpreted a superconductor as an electron gas immersed in a medium with the dielectric constant $ε$ and a certain elasticity, which could be determined by measured sonic speed in the metal. The obtained expression of effective electron-electron interaction (EEI) potential unambiguously…
SuperconductivityMaterials Sciencemath.MPcond-mat.stat-mechStrongly Correlated Electrons
Yoav Tsori2006-04-09arXiv
We consider theoretically liquid rise against gravity in capillaries with height-dependent cross-section. For a conical capillary made from a hydrophobic surface and dipped in a liquid reservoir, the equilibrium liquid height depends on the cone opening angle $α$, the Young-Dupré contact angle $θ$, the cone radius at…
Materials ScienceSoft Condensed Matter
Yumei Gong、Haiying Huang、Zhijun Hu 等 7 位作者2006-04-08Macromolecules
We have investigated the inverted phase formation and the transition from inverted to normal phase for a cylinder-forming polystyrene- block -poly(methyl methacrylate) (PS- b - PMMA) diblock copolymer in solution-cast films with thickness about 300 nm during the process of the solution concentrating by slow solvent ev…
Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyFluid Dynamics and Thin Films
S. Imatomi、R. Kitashima、T. Hamamastu 等 6 位作者2006-04-08Chemistry Letters
Abstract A one-dimensional (1D) polynuclear spin-crossover FeIII complex, [FeIII(acacen)(bpyp)]n(BPh4)n, showed a gradual and complete SC over a wide temperature range of ca. 250 K between S = 5/2 and S = 1/2, where acacen = N,N′-bis(acetylacetonato)ethylenediamine, bpyp = 1,3-bis(4-pyridyl)propane, and BPh4− = tetrap…
Lanthanide and Transition Metal ComplexesPorphyrin and Phthalocyanine ChemistryMagnetism in coordination complexes
Michael Schnall-Levin、Eric Lauga、Michael P. Brenner2006-04-08Langmuir
Particles adsorbed on the surface of a droplet form three-dimensional packings when the droplet evaporates. We study the final packings when the liquid droplet is attached to a solid substrate. In contrast to a droplet evaporating away from a substrate, here the final packings are highly dependent on both the number o…
Micro and Nano RoboticsNanomaterials and Printing TechnologiesPickering emulsions and particle stabilization
Byoungchul Lee、Mustafa Selman Yavuz、Gregory A. Sotzing2006-04-08Macromolecules
Herein we report the synthesis of symmetrical bis(thieno[3,4- b ]thiophene)s and their electrochemical polymerization. The 2,2‘-bis(T34bT) has an oxidation peak at 0.73 V for electropolymerization whereas both 4,4‘-bisT34bT and 6,6‘-bisT34bT have peak oxidation potentials for polymerization at 0.49 and 0.53 V (0.44 V…
Conducting polymers and applicationsOrganic Electronics and PhotovoltaicsPhotochromic and Fluorescence Chemistry
Shengwen Zhang、Shuxue Zhou、Yu-Ming Weng 等 4 位作者2006-04-08Langmuir
The polystyrene latex nanoparticles bearing silanol groups on their surfaces were successfully synthesized via miniemulsion polymerization using gamma-methacryloxypropyltrimethoxysilane (MPS) as the functional comonomer and oil-soluble AIBN as the initiator at neutral conditions. FTIR and 29Si NMR spectra showed that…
Mesoporous Materials and CatalysisAdvanced Polymer Synthesis and CharacterizationPhotopolymerization techniques and applications
Masakazu Tanaka、Robert J. Young2006-04-08Macromolecules
Molecular orientation distributions in the crystalline and amorphous regions were studied for uniaxially oriented poly( l -lactic acid) (PLLA) films using polarized Raman spectroscopy. By combining wide-angle X-ray diffraction and birefringence measurements, the tilt angle between the principal axis of the Raman tenso…
biodegradable polymer synthesis and propertiesPolymer crystallization and propertiesNanocomposite Films for Food Packaging
Chuanjiang Hu、Jin An、B.C. Noll 等 5 位作者2006-04-08Inorganic Chemistry
The preparation and characterization of two new five-coordinate, imidazole-ligated, high-spin iron(II) octaethylporphyrinates is described. [Fe(OEP)(1,2-Me2Im)] and [Fe(OEP)(2-MeHIm)] have been characterized by X-ray structure determinations and temperature-dependent Mössbauer spectroscopy in zero and applied magnetic…
Hemoglobin structure and functionMetal-Catalyzed Oxygenation MechanismsPorphyrin and Phthalocyanine Chemistry