Bo Zou、Mingfeng Wang、Dengli Qiu 等 6 位作者2002-04-05Chemical Communications
Stable surface nanostructures with different morphology have been successfully constructed by modifying the chemical structure of synthetic amphiphiles; by introducing mesogenic groups into bolaform amphiphiles, stable spaghetti-like or stripe-like nanostructures can be obtained; it is believed that such a kind of sur…
Polymer Surface Interaction StudiesSupramolecular Self-Assembly in MaterialsPickering emulsions and particle stabilization
My Hang V. Huynh、R.T.K. Baker、Donald L. Jameson 等 5 位作者2002-04-05Journal of the American Chemical Society
Reactions between the Os(VI)-nitrido complexes, [OsVI(L2)(Cl)3(N)] (L2 = 2,2'-bipyridine (bpy) ([1]), 4,4'-dimethyl-2,2'-bipyridine (Me2bpy), 1,10-phenanthroline (phen), and 4,7-diphenyl-1,10-phenanthroline (Ph2phen)), and bis-(triphenylphosphoranylidene)ammonium azide (PPNN3) in dry CH3CN at 60 degrees C under N2 giv…
Metal complexes synthesis and propertiesRadioactive element chemistry and processingLanthanide and Transition Metal Complexes
Marcel H. F. Sluiter、Vijay Kumar、Yoshiyuki Kawazoe2002-04-05Physical review. B, Condensed matter
Ab initio calculations on (10,10) and (12,12) single-wall carbon-nanotube bundles show that the nature of the phase transformation under hydrostatic pressure is determined by the symmetry of the nanotubes. Bundles of (10,10) nanotubes that are incommensurate with the hexagonal lattice, have small deviations from hexag…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchBoron and Carbon Nanomaterials Research
Takashi Miyake、Susumu Saito2002-04-05Physical review. B, Condensed matter
We present a density functional study of zigzag carbon nanotubes containing potassium atoms inside. We find that the effect of potassium doping is not simple charge transfer. The nearly free electron state of nanotube couples with the $\mathrm{K} 4s$ orbital. The state comes downward as the tube is thicker and crosses…
Carbon Nanotubes in CompositesGraphene research and applicationsForce Microscopy Techniques and Applications
Declan Gaynor、З.А. Старикова、S. Ostrovsky 等 5 位作者2002-04-05Chemical Communications
The reaction of 2-(dimethylamino)phenylhydroxamic acid (2-dmAphaH) with NiSO(4).6H2O gives the complex [Ni7(2-dmAphaH-1)2(2-dmApha)8(H2O)2]SO(4).15H2O uniquely exhibiting four distinct hydroxamate binding modes, two of which are novel, and showing both antiferromagnetic and ferromagnetic interactions in contrast to [C…
Metal-Organic Frameworks: Synthesis and ApplicationsMetal complexes synthesis and propertiesMagnetism in coordination complexes
M. A. Martín-Delgado、Javier Rodríguez-Laguna、Germán Sierra2002-04-05Physical review. B, Condensed matter
We introduce the density-matrix renormalization-group method as an efficient computational tool for one-exciton approximations with off-diagonal disorder (single-particle problems). This method allows us to reduce the computational effort by targeting only a few low-lying eigenstates at each statistical sampling, in c…
2D Materials and ApplicationsLuminescence and Fluorescent MaterialsDendrimers and Hyperbranched Polymers
Helen Gomonay、В. М. Локтев2002-04-05Journal of Physics Condensed Matter
The problem of the observable equilibrium domain structure (DS) in pure antiferromagnets is investigated with the use of continuous elasticity theory. It is shown that the difference between the bulk and surface magnetoelastic strains causes imaginary `incompatibility elastic charges' analogous to the surface `magneti…
Magnetic properties of thin filmsMultiferroics and related materialsMagnetic Properties and Applications
Rafael A. Molina、Dietmar Weinmann、Rodolfo A. Jalabert2002-04-05Physical review. B, Condensed matter
We study the linewidth of the surface plasmon resonance in the optical absorption spectrum of metallic nanoparticles, when the decay into electron-hole pairs is the dominant channel. Within a semiclassical approach, we find that the electron-hole density-density correlation oscillates as a function of the size of the…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchSpectroscopy and Quantum Chemical Studies
Avi Bino、Michael Ardon、Dongwhan Lee 等 5 位作者2002-04-05Journal of the American Chemical Society
The reaction between ferric fluoride trihydrate and pyridine in hot methanol produced yellow-brown crystals of (PyH)5.[Fe13O4F24(OMe)12].4H2O.CH3OH. The anionic complex [Fe13O4F24(OMe)12]5- (1), which has a full Td symmetry, is the first example of an open-shell Keggin ion consisting of 13 high-spin d5 iron(III) atoms…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Antonis N. Andriotis、Madhu Menon、Deepak Srivastava 等 4 位作者2002-04-05Physical review. B, Condensed matter
Quantum conductivity of a wide class of carbon nanotube Y junctions is calculated using an efficient Green's function embedding scheme. Our results indicate that rectification and switching properties of these junctions depend strongly on the symmetry and to a lesser degree on chirality. We find that a zig-zag tube fo…
Carbon Nanotubes in CompositesForce Microscopy Techniques and ApplicationsNanopore and Nanochannel Transport Studies
Daan Frenkel2002-04-05Science
Macromolecules or colloids in solution can serve as large-scale models for atoms and simple molecules. But as Frenkel explains in his Perspective, this is not all. Colloidal suspensions can also form new states of matter. He highlights the reports by Velikov et al. and Pham et al., who demonstrate how the properties o…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesPickering emulsions and particle stabilization
Carolyn Jones Otten、O. Lourie、Min‐Feng Yu 等 7 位作者2002-04-05Journal of the American Chemical Society
Ideal nanowire interconnects for nanoelectronics will be refractory, covalently bonded, and highly conductive, irrespective of crystallographic orientation. Theoretical studies suggest that boron nanotubes should be stable and exhibit higher electrical conductivities than those of carbon nanotubes. We describe CVD gro…
Graphene research and applicationsBoron and Carbon Nanomaterials ResearchMXene and MAX Phase Materials
Pierre Bouvier、J. Kreisel2002-04-05Journal of Physics Condensed Matter
We report on a study of pressure-dependent structural properties of LaAlO 3 , which is considered to be a model material of the class of `tilted' perovskites. Our high-pressure investigation by means of Raman spectroscopy and synchrotron radiation shows that LaAlO 3 presents structural instabilities under pressure and…
High-pressure geophysics and materialsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Changwook Kim、Bongsoo Kim、Seung Mi Lee 等 5 位作者2002-04-05Physical review. B, Condensed matter
We have investigated the electronic structure of capped carbon nanotubes under electric fields by density functional calculations. The calculated effective work function of the capped armchair nanotubes decreases linearly with increasing electric fields, whereas that of the metal tip decreases quadratically. We analyz…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Arup Neogi、Chang-Won Lee、Henry O. Everitt 等 6 位作者2002-04-05arXiv
Using time-resolved photoluminescence measurements, the recombination rate in an In$_{0.18}$Ga$_{0.82}$N/GaN quantum well (QW) is shown to be greatly enhanced when spontaneous emission is resonantly coupled to a silver surface plasmon. The rate of enhanced spontaneous emission into the surface plasmon was as much as 9…
Mesoscale and Nanoscale PhysicsMaterials Science
M. Takahashi、K. Kubo2002-04-05arXiv
Taking into account both random impurity distribution and thermal fluctuations of localized spins, we have performed a model calculation for the carrier (hole) state in Ga$_{1-x}$Mn$_x$As by using the coherent potential approximation (CPA). The result reveals that a {\it p}-hole in the band tail of Ga$_{1-x}$Mn$_x$As…
Materials Sciencecond-mat.stat-mech
Kamal Krishna Saha、Tanusri Saha-Dasgupta、Abhijit Mookerjee 等 5 位作者2002-04-05Journal of Physics Condensed Matter
In this communication we suggest a formulation of the optical conductivity as a convolution of an energy-resolved joint density of states and an energy-frequency labelled transition rate. Our final aim is to develop a scheme based on the augmented space recursion for random systems. In order to gain confidence in our…
Ferroelectric and Piezoelectric MaterialsElectronic and Structural Properties of OxidesChemical and Physical Properties of Materials
E Rauwel Buzin、W. Prellier、B. Mercey 等 5 位作者2002-04-05Journal of Physics Condensed Matter
Strained thin films of charge/orbital-ordered (CO/OO) Nd 0.5 Ca 0.5 MnO 3 with various thicknesses have been grown on (100) SrTiO 3 and (100) LaAlO 3 substrates, by using the pulsed laser deposition technique. The thickness of the films drastically influences the transport properties. As the thickness decreases, the C…
High-pressure geophysics and materialsMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
Min‐Sik Park、S. K. Kwon、B. I. Min2002-04-05Physical review. B, Condensed matter
We have investigated electronic structures of a room-temperature-diluted magnetic semiconductor: Co-doped anatase ${\mathrm{TiO}}_{2}.$ We have obtained the half-metallic ground state in the local-spin-density approximation (LSDA) and the insulating ground state in the $\mathrm{LSDA}+U+\mathrm{SO}$ incorporating the s…
ZnO doping and propertiesMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
A. I. Ritus、А. В. Пронин、А. А. Волков 等 7 位作者2002-04-05Physical review. B, Condensed matter
Physical properties of semiconducting ${\mathrm{CdF}}_{2}$ crystals doped with In are determined from measurements of the radio-frequency response of a sample with Schottky barriers at frequencies $10\ensuremath{-}{10}^{6} \mathrm{Hz}.$ The dielectric constant, the dc conductivity, the activation energy of the amphote…
High-pressure geophysics and materialsSemiconductor materials and interfacesSolid-state spectroscopy and crystallography