Morgan R. Alexander、Francis S. Mair、Robin G. Pritchard 等 4 位作者2003-07-31Applied Organometallic Chemistry
Abstract Reaction of AlCl 3 with {Me 2 SiO} n (Dow‐Corning high‐vacuum grease) at an Al : Si ratio of 1 : 1 in hexane at room temperature yielded a large crop of colorless crystals of [{ClSiMe 2 OAlCl 2 } 2 ], which were characterized by single‐crystal X‐ray diffraction and NMR. These crystals hydrolyzed on an aluminu…
Catalytic Cross-Coupling ReactionsMesoporous Materials and CatalysisSynthesis and characterization of novel inorganic/organometallic compounds
Nae‐Man Park、Sang Hyeob Kim、Gun Yong Sung2003-07-31Journal of Applied Physics
The band gap tuning of amorphous silicon carbon nitride thin (a-SiCN) film was demonstrated in the range of 2.3–3.0 eV by pulsed laser deposition using mixed targets. a-SiCN films were grown on silicon and quartz glass substrates at room temperature in a vacuum. Targets were fabricated by compacting a mixture of silic…
Advanced ceramic materials synthesisMetal and Thin Film MechanicsDiamond and Carbon-based Materials Research
Hai‐Shun Wu、Xiaohong Xu、Fuqiang Zhang 等 4 位作者2003-07-31The Journal of Physical Chemistry A
The structure and stability of the (B 12 N 12 ) n ( n = 1, 2) cages have been computed at the B3LYP level of density functional theory. The most stable B 12 N 12 cage is the T h symmetrical structure with six isolated squares. The dimerization pattern of B 12 N 12 differs strongly from those of C 60 and C 20 . The mos…
Boron and Carbon Nanomaterials ResearchMXene and MAX Phase MaterialsBoron Compounds in Chemistry
Kazuhiro Kirihara、Takahiro Nagata、Kaoru Kimura 等 7 位作者2003-07-31Physical review. B, Condensed matter
X-ray charge densities of Al-based icosahedral quasicrystalline approximant crystals $\ensuremath{\alpha}\ensuremath{-}\mathrm{AlReSi},$ $\ensuremath{\alpha}\ensuremath{-}\mathrm{AlMnSi},$ and ${\mathrm{Al}}_{12}\mathrm{Re}$ were observed by a combination of the maximum entropy method with the Rietveld method. We succ…
Crystallography and molecular interactionsQuasicrystal Structures and PropertiesX-ray Diffraction in Crystallography
Julien Pisson、Christine Taviot‐Guého、Yaël Israëli 等 9 位作者2003-07-31The Journal of Physical Chemistry B
The layered double hydroxides (LDHs) Zn 2 Al(OH) 6 Cl· n H 2 O, Zn 2 Cr(OH) 6 Cl· n H 2 O, and Cu 2 Cr(OH) 6 Cl· n H 2 O have been shown to undergo staged intercalation reactions with succinate and tartrate anions. Monitoring the process in situ using energy-dispersive X-ray diffraction reveals the formation of second…
Polyoxometalates: Synthesis and ApplicationsLayered Double Hydroxides Synthesis and ApplicationsMagnesium Oxide Properties and Applications
Shangying Liu、Jie Zhang、Ning Wang 等 6 位作者2003-07-31Chemistry of Materials
Colloidal dispersions of Mg/Al LDH platelets show liquid-crystal phase at a certain particle concentration. Threaded texture observed with polarized microscopy indicated it was typical of a nematic phase, which can often be found in traditional liquid crystals.
Flame retardant materials and propertiesLayered Double Hydroxides Synthesis and ApplicationsMicrowave Dielectric Ceramics Synthesis
D. Christoph Mueller、Eduardo Alonso、Wolfgang Fichtner2003-07-31Physical review. B, Condensed matter
Various vacancy-impurity complexes that are believed to account for the deactivation of As in highly n-doped silicon are investigated using the density functional theory. The electronic structure and defect levels of these impurities are determined, both of which are crucial for the understanding and modeling of the d…
Silicon and Solar Cell TechnologiesSilicon Nanostructures and PhotoluminescenceSemiconductor materials and interfaces
Xin Lü、Feng Tian、Xin Xu 等 5 位作者2003-07-31Journal of the American Chemical Society
The viability of 1,3-dipolar cycloadditions of a series of 1,3-dipolar molecules (azomethine ylide, ozone, nitrone, nitrile imine, nitrile ylide, nitrile oxide, diazomethane, and methyl azide) onto the sidewalls of carbon nanotubes has been assessed theoretically by means of a two-layered ONIOM approach. The theoretic…
Carbon Nanotubes in CompositesGraphene research and applicationsMolecular Junctions and Nanostructures
J. G. Braden、J. S. Parker、P. Xiong 等 5 位作者2003-07-31Physical Review Letters
We have carried out a direct measurement of the degree of spin polarization ($\mathbit{P}$) of the magnetic semiconductor ${\mathrm{G}\mathrm{a}}_{1\ensuremath{-}x}{\mathrm{M}\mathrm{n}}_{x}\mathrm{A}\mathrm{s}$ using Andreev reflection spectroscopy. Analyses of the conductance spectra of high transparency ${\mathrm{G…
Magnetic properties of thin filmsZnO doping and propertiesElectronic and Structural Properties of Oxides
Ken‐ichi Okazaki、Yoshihiro Nakato、Kei Murakoshi2003-07-31Physical review. B, Condensed matter
Electrochemical potential dependence of Raman intensity of isolated single-walled carbon nanotubes (SWNT) on gold electrode in aqueous solution was investigated employing in situ resonant confocal micro Raman spectroscopy. Absolute potential of the Fermi level of individual tubes was estimated from the potential depen…
Carbon Nanotubes in CompositesElectrochemical Analysis and ApplicationsNanopore and Nanochannel Transport Studies
Sarbajit Banerjee、Stanislaus S. Wong2003-07-31Journal of the American Chemical Society
The generation of nanoscale interconnects and supramolecular, hierarchical assemblies enables the development of a number of novel nanoscale applications. A rational approach toward engineering a robust system is through chemical recognition. Here, we show the in situ mineralization of crystalline CdTe quantum dots on…
Carbon Nanotubes in CompositesGraphene research and applicationsQuantum Dots Synthesis And Properties
Timothy A. Crowley、Kirk J. Ziegler、Daniel Mark Lyons 等 7 位作者2003-07-31Chemistry of Materials
Metallic nanowires of cobalt, copper, and iron oxide magnetite (Fe 3 O 4 ) have been synthesized within the pores of mesoporous silica using a supercritical fluid inclusion technique. The mesoporous matrix provides a means of producing a high density of stable, hexagonally ordered arrays of highly crystalline nanowire…
Mesoporous Materials and CatalysisBlock Copolymer Self-AssemblyAnodic Oxide Films and Nanostructures
Seongjun Park、Deepak Srivastava、Kyeongjae Cho2003-07-31Nano Letters
We have developed a model to predict the chemical reactivity of carbon nanotubes (CNTs) quantitatively from their initial structures. The parameters, universal for each reaction, of the model can be obtained from a graphene sheet analysis. The chemical reactivity of hydrogenation, hydroxylation, and fluorination were…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Sang‐Hun Jeong、Jae‐Keun Kim、Byung‐Teak Lee2003-07-31Journal of Physics D Applied Physics
ZnO films were prepared on Si(100) substrates using rf magnetron sputtering and the correlations between the growth conditions and the resultant film properties were discussed. The intensity of the visible emission related with intrinsic defects in ZnO film was dramatically suppressed by increasing the O 2 /Ar+O 2 rat…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials
Seiji Motojima、Yohei Noda、S. Hoshiya 等 4 位作者2003-07-31Journal of Applied Physics
The electromagnetic (EM) wave absorption properties in the gigahertz region (12–110 GHz) of carbon microcoils (CMCs) with a three-dimensional-helical/spiral chiral structure (1–10 μm coil diameter and 0.1–10 mm coil length) were examined using the open space method. It was found that the target value of reflection los…
Electromagnetic wave absorption materialsAdvanced Antenna and Metasurface TechnologiesElectromagnetic Compatibility and Measurements
Israël M. Mbomekallé、Bineta Keita、M. Nierlich 等 6 位作者2003-07-31Inorganic Chemistry
The three novel, multi-nickel-substituted heteropolytungstates [Ni(6)As(3)W(24)O(94)(H(2)O)(2)](17)(-) (1), [Ni(3)Na(H(2)O)(2)(AsW(9)O(34))(2)](11)(-) (2), and [Ni(4)Mn(2)P(3)W(24)O(94)(H(2)O)(2)](17)(-) (3) have been synthesized and characterized by IR, elemental analysis, electrochemistry, and magnetic studies. Sing…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis
V. K. Dugaev、J. Berakdar、J. Barnas2003-07-31arXiv
Electronic transport through thin and laterally constrained domain walls in ferromagnetic nanojunctions is analyzed theoretically. The description is formulated in the basis of scattering states. The resistance of the domain wall is calculated in the regime of strong electron reflection from the wall. It is shown that…
Materials Science
S. A. Prosandeev、Eric Cockayne、Benjamin P. Burton2003-07-31Physical review. B, Condensed matter
${\mathrm{K}}_{1\ensuremath{-}x}{\mathrm{Li}}_{x}{\mathrm{TaO}}_{3}$ (KLT) solid solutions exhibit a variety of interesting physical phenomena related to large displacements of Li-ions from ideal perovskite A-site positions. First-principles calculations for KLT supercells were used to investigate these phenomena. Lat…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsDielectric properties of ceramics
Alberto Franceschetti、Sokrates T. Pantelides2003-07-31Physical review. B, Condensed matter
Excited-state relaxations in molecules are responsible for a redshift of the absorption peak with respect to the emission peak (Franck-Condon shift). The magnitude of this shift in semiconductor quantum dots is still unknown. Here we report first-principle calculations of excited-state relaxations in small (diameter $…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceIon-surface interactions and analysis
Alexandr Parfenov、Ignacy Gryczyński、Joanna Malicka 等 5 位作者2003-07-31The Journal of Physical Chemistry B
Recent reports have shown enhanced fluorescence for fluorophores in close proximity to chemically deposited silver islands or colloids. To expand the usefulness of metal-enhanced fluorescence we tested fractal silver structures formed on, or near, silver electrodes by passage of electric currents. The emission intensi…
Gold and Silver Nanoparticles Synthesis and ApplicationsBiosensors and Analytical DetectionElectrochemical Analysis and Applications