Torsten Hegmann、Jens Kain、Siegmar Diele 等 6 位作者2003-03-14Journal of Materials Chemistry
Six novel series of mononuclear ortho-palladated and ortho-platinated metallomesogens have been obtained by combination of rod-like heteroaromatic liquid crystals with bent or half-disc-shaped 1,3-diketonate units. The synthesis of these molecules was achieved by ortho-metallation of rod-like 2-phenylpyrimidines and 2…
Liquid Crystal Research AdvancementsCoordination Chemistry and OrganometallicsMolecular spectroscopy and chirality
Shu-Jian Chen、Xue‐Tai Chen、Zi‐Ling Xue 等 7 位作者2003-03-14Journal of Materials Chemistry
A solvothermal route to MnWO4 nanoparticles and nanorods has been developed. These nano-size products have been characterized by X-ray diffraction and transmission electron microscopy. The pressure, pH and temperature of the reaction systems were found to play important roles in determining the morphologies of the MnW…
Luminescence Properties of Advanced MaterialsFerroelectric and Piezoelectric MaterialsTransition Metal Oxide Nanomaterials
Chien‐Le Li、Shwu‐Ju Shieh、Shien-Chang Lin 等 4 位作者2003-03-14Organic Letters
[structure: see text] A series of oligo(phenylenevinylene) (OPV) derivatives with finite conjugation units were prepared in short steps from few building blocks. The central and terminal aryl groups of these OPV dyes contain cyano and Ph(2)N substituents, respectively, which affect color of fluorescence. The wavelengt…
Organic Electronics and PhotovoltaicsLuminescence and Fluorescent MaterialsPhotochromic and Fluorescence Chemistry
Gavin A. Buxton、Anna C. Balazs2003-03-14Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
We couple a morphological study of a mixture of diblock copolymers and spherical nanoparticles with a micromechanical simulation to determine how the spatial distribution of the particles affects the mechanical behavior of the composite. The morphological studies are conducted through a hybrid technique, which combine…
Material Dynamics and PropertiesBlock Copolymer Self-AssemblyPickering emulsions and particle stabilization
Kimber L. Stamm、Jayne C. Garno、Gang-yu Liu 等 4 位作者2003-03-14Journal of the American Chemical Society
Nanoparticles of iron phosphide have been prepared through a new strategy involving the reductive annealing of nanoparticulate iron phosphate precursors cast onto atomically flat mica surfaces. This route appears to be general for a range of transition metals and pnicogens and avoids the use of highly toxic and pyroph…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsIron-based superconductors research
Mingfei Zhou、Nobuko Tsumori、Lester Andrews 等 4 位作者2003-03-14The Journal of Physical Chemistry A
The reactions of ground-state boron atoms with CO in solid argon have been reinvestigated. The BCO molecule was formed by codeposition of laser-ablated boron atoms with CO in argon. The ν 1, ν 2, ν 3, 2ν 1, 2ν 3, and ν 1 + ν 3 modes of isotopic BCO molecules have been measured. The linear dicarbonyl, B(CO) 2, and the…
Advanced Chemical Physics StudiesHigh-pressure geophysics and materialsBoron and Carbon Nanomaterials Research
Antonio Urbina、Isabel Echeverrı́a、A. Pérez‐Garrido 等 5 位作者2003-03-14Physical Review Letters
We have prepared solutions of multiwalled carbon nanotubes in Aroclor 1254, a mixture of polychlorinated biphenyls. The solutions are stable at room temperature. Transport measurements were performed using a scanning-tunneling probe on a sample prepared by spin coating the solution on gold substrates. Conductance step…
Carbon Nanotubes in CompositesGraphene research and applicationsForce Microscopy Techniques and Applications
Eugene Pashkovski、James G. Masters、A. Mehreteab2003-03-14Langmuir
The structure and formation of particulate silica networks in biopolymer solutions were studied using rheological measurements and diffusing wave spectroscopy (DWS). For samples with different volume fractions of silica, the frequency-dependent viscoelastic moduli can be scaled onto one master curve by shifting the da…
Proteins in Food SystemsMaterial Dynamics and PropertiesPolysaccharides Composition and Applications
Krzysztof Pielichowski、Kamil Kulesza、Eli M. Pearce2003-03-14Journal of Applied Polymer Science
Abstract The effect of sodium dihydrogenphosphate, trisodium pyrophosphate, and sodium aluminocarbonate on the thermal decomposition of rigid polyurethane (PUR) foams, based on diphenylmethane‐4,4‐diisocyanate, diphenyl‐2,2‐propane‐4,4‐dioxyoligo(ethylene oxide), and oxyalkylenated toluene‐2,6‐diamine, blown with pent…
Polymer composites and self-healingFlame retardant materials and propertiesThermal and Kinetic Analysis
Qing Peng、Yajie Dong、Yadong Li2003-03-14Inorganic Chemistry
A novel coreduction method was developed to synthesize uniform one-dimensional CoTe and NiTe nanocluster wires. In the synthesis, soluble Na(2)TeO(3) was used to supply a highly reactive Te source and N(2)H(4).H(2)O was used both as reducing agent and as complexing agent. The as-prepared samples were characterized by…
Quantum Dots Synthesis And PropertiesAdvanced Thermoelectric Materials and DevicesChalcogenide Semiconductor Thin Films
Andrei V. Palii、Boris Tsukerblat、Eugenio Coronado 等 5 位作者2003-03-14Inorganic Chemistry
The microscopic theory of the magnetically anisotropic effective pseudo-spin-(1)/(2) Hamiltonian for a pair of Co(2+) ions is reported. In the framework of the second-order perturbation approach, the analytical expressions are found for the components of the tensor of the exchange interaction, g-tensor, and the factor…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Youngmi Cho、Seungwu Han、Gunn Kim 等 5 位作者2003-03-14Physical Review Letters
We investigate the electronic structure of the fullerenes encapsulated inside carbon nanotubes, the so-called nanopeapods, using the first-principles study. The orbital hybridization of LUMO+1 (the state above the lowest unoccupied molecular orbital) of C60, rather than LUMO as previously proposed, with the nanotube s…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
B. N. Khare、M. Meyyappan、Marla H. Moore 等 6 位作者2003-03-14Nano Letters
Single-walled carbon nanotubes (SWNTs) were irradiated with 1 MeV protons and the samples were analyzed using Fourier transform infrared spectroscopy, UV−vis−NIR spectroscopy, Raman spectroscopy, and secondary ion mass spectrometry. There is clear evidence that the irradiated sample contains C−H bonds.
Carbon Nanotubes in CompositesIon-surface interactions and analysisPolymer Nanocomposite Synthesis and Irradiation
Zheng He、Cheng He、En‐Qing Gao 等 7 位作者2003-03-14Inorganic Chemistry
One-dimensional lanthanide-transition heterometallic chains of squares, [LnNi(2)L(3)(HL)(DMF)(4)(ClO(4))(4).S]( infinity ) (Ln = Gd and Tb; HL is the Schiff base obtained by the condensation of 2-pyridylaldehyde with isonicotinic hydrazide N-oxide; S = solvent) and [LnNi(2)L(4)(DMF)(4)(ClO(4))(3).S]( infinity ) (Ln =…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Sander Haemers、Ger J. M. Koper、G. Frens2003-03-14Biomacromolecules
The cross-linking behavior of mussel adhesive protein Mefp-1 was studied by measuring the rate of aggregation of the protein by photon correlation spectroscopy. To be able to calculate the aggregation numbers, the hydrodynamic radius of monomer Mefp-1 (10 nm) was determined under reducing conditions. The aggregation i…
Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsHemoglobin structure and function
F Haguenau、Peter Hawkes、J. L. Hutchison 等 6 位作者2003-03-14Microscopy and Microanalysis
It is not easy to understand how the electron microscopes and electron microscope techniques that we know today developed from the primitive ideas of the first microscopists of the 1930s. Newcomers to the subject in particular, their time almost fully occupied with grasping practical methods and modern computing techn…
Advanced Electron Microscopy Techniques and ApplicationsElectron and X-Ray Spectroscopy TechniquesTwentieth Century Scientific Developments
Richard McAloney、V. V. Dudnik、M. Cynthia Goh2003-03-14Langmuir
The layer-by-layer (LBL) adsorption of polyelectrolytes onto charged surfaces from aqueous solutions produces multilayered surface structures. A multilayer film of polydiallyldimethylammonium chloride (PDDA) and polystyrenesulfonic acid, sodium salt (PSS), prepared using 1.0 M NaCl in the polymer solutions, has a verm…
Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsAnalytical Chemistry and Sensors
Ado Jório、M. A. Pimenta、A. G. Souza Filho 等 10 位作者2003-03-14Physical Review Letters
Resonance Raman studies on single wall carbon nanotubes (SWNTs) show that resonance with cross polarized light, i.e., with the E(mu,mu+/-1) van Hove singularities in the joint density of states needs to be taken into account when analyzing the Raman and optical absorption spectra from isolated SWNTs. This study is per…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchMechanical and Optical Resonators
Gábor Molnár、V. Niel、José-A. Real 等 6 位作者2003-03-14The Journal of Physical Chemistry B
The spin state of a series of cyanide-bridged iron(II) spin-crossover coordination polymers of formula Fe(pyrazine)[M(CN) 4 ]·2H 2 O (M = Ni, Pd, or Pt) have been studied by recording their solid-state Raman spectra at room temperature as a function of pressure. For the first time, a reproducible piezo-hysteresis loop…
Metal complexes synthesis and propertiesMagnetism in coordination complexesOrganic and Molecular Conductors Research
Yuichi Negishi、Tatsuya Tsukuda2003-03-14Journal of the American Chemical Society
We report herein a simple method to prepare subnanometer-sized gold clusters by the reactions between hydrogen tetrachloroaurate (HAuCl4) and meso-2,3-dimercaptosuccinic acid (DMSA; HO2CCH(SH)CH(SH)CO2H) in water. It is demonstrated that DMSA molecules efficiently reduce the Au(III) species and stabilize the resultant…
Gold and Silver Nanoparticles Synthesis and ApplicationsNanocluster Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis