Z.E. Serna、Roberto Cortés、M. Karmele Urtiaga 等 7 位作者2001-02-06European Journal of Inorganic Chemistry
Two polymorphous compounds with the general formula [Cu(NCS)2(dpk·CH3OH)]n (dpk = di-2-pyridyl-ketone) have been synthesised and have been characterised both structurally and magnetically. The dpk·CH3OH ligand is the result of the metal-promoted solvolysis of dpk in methanol and acts as a neutral donor. X-ray analysis…
Metal-Organic Frameworks: Synthesis and ApplicationsMetal complexes synthesis and propertiesMagnetism in coordination complexes
Mark Wilson、Paul A. Madden2001-02-06Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTGrowth of Ionic Crystals in Carbon NanotubesMark Wilson and Paul A. MaddenView Author Information Physical and Theoretical Chemistry Laboratory Oxford University, South Parks Road, Oxford OX1 3QZ, U.K. Cite this: J. Am. Chem. Soc. 2001, 123, 9, 2101–2102Publication Dat…
Carbon Nanotubes in CompositesGraphene research and applicationsChemical and Physical Properties of Materials
Victor N. Nemykin、Nagao Kobayashi、Viktor Chernii 等 4 位作者2001-02-06European Journal of Inorganic Chemistry
We present the crystal structure of pcFe(4-methylpiperidine)2 as a first example of a low-spin iron(II) phthalocyanine (pc) complex bis-axially coordinated by aliphatic amines. It is shown that electronic rather than steric effects are responsible for the elongation of the Fe−N(axial) bond in pcFeL2 complexes. Using d…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistrySurface Chemistry and Catalysis
Ka-Wo Poon、Wei Liu、Pui-Kwan Chan 等 7 位作者2001-02-06The Journal of Organic Chemistry
Up to eight redox-active ferrocenyl units have been incorporated, through the unsaturated ethynyl linkers, on the periphery of a series of cyclic tetrapyrrole derivatives including zinc(II) phthalocyanine and 2,3-naphthalocyanine, and nickel(II) meso-diphenylporphyrin. The synthesis of the former two macrocycles 4 and…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresFerrocene Chemistry and Applications
James P. Sethna、Karin A. Dahmen、Christopher R. Myers2001-02-06arXiv
Crackling noise arises when a system responds to changing external conditions through discrete, impulsive events spanning a broad range of sizes. A wide variety of physical systems exhibiting crackling noise have been studied, from earthquakes on faults to paper crumpling. Because these systems exhibit regular behavio…
cond-mat.dis-nnMaterials ScienceSoft Condensed Mattercond-mat.stat-mech
Marco Fornari、David J. Singh2001-02-06Physical review. B, Condensed matter
The competitions between ferroelectric and rotational instabilities in rhombohedral ${\mathrm{PbZr}}_{x}{\mathrm{Ti}}_{1\ensuremath{-}x}{\mathrm{O}}_{3}$ near $x=0.5$ are investigated using first-principles density-functional supercell calculations. As expected, we find a strong ferroelectric instability. However, we…
Ferroelectric and Piezoelectric MaterialsHigh-pressure geophysics and materialsMultiferroics and related materials
Satoshi Okamoto、Sumio Ishihara、Sadamichi Maekawa2001-02-06Physical review. B, Condensed matter
Correlation between orbital structure and magnetic ordering in layered manganites is examined. A level separation between the ${3d}_{{3z}^{2}\ensuremath{-}{r}^{2}}$ and ${3d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ orbitals in a Mn ion is calculated in the ionic model for a large number of the compounds. It is found that the…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
E. V. Sampathkumaran、Subham Majumdar2001-02-06arXiv
The results of electrical resistance (1.4 - 300 K), magnetization (2-300 K) and heat-capacity (2 - 50 K) measurements in Y$_2$PdGe$_3$, found to crystallize in a AlB$_2$-derived hexagonalstructure, are reported. The results establish that this compound is superconducting below 3 K. This obervation is interesting consi…
Materials ScienceSuperconductivity
Yan Li、Jie Liu、Yongqian Wang 等 4 位作者2001-02-06OpenAlex
Uniform iron−molybdenum nanoparticles were prepared by thermal decomposition of metal carbonyl complexes using a mixture of long-chain carboxylic acid and long-chain amine as protective agents. The sizes of the nanoparticles can be systematically varied from 3 to 14 nm by changing the experimental conditions. High-res…
Advancements in Battery MaterialsCarbon Nanotubes in CompositesGraphene research and applications
Richard Q. Long、Ralph T. Yang2001-02-06OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCarbon Nanotubes as Superior Sorbent for Dioxin RemovalRichard Q. Long and Ralph T. YangView Author Information Department of Chemical Engineering University of Michigan Ann Arbor, Michigan 48109-2136 Cite this: J. Am. Chem. Soc. 2001, 123, 9, 2058–2059Publication Date…
Carbon Nanotubes in CompositesGraphene research and applicationsNanopore and Nanochannel Transport Studies
J. R. Philip、R. Rajesh、Carlo Menon2001-02-05Applied Physics Letters
The thermal conductivity and heat capacity of Pb modified Ge–Se glasses, Pb20GexSe80−x (x=17–24) and PbyGe42−ySe58 (y=0–20), which exhibit carrier-type reversal from p type to n type at specific compositions, have been measured simultaneously by the photopyroelectric technique. The thermal conductivity as well as the…
Glass properties and applicationsPhase-change materials and chalcogenidesThermography and Photoacoustic Techniques
Norikazu Tomita、Keiichirō Nasu2001-02-05Physical review. B, Condensed matter
We study quantum fluctuation effects on light absorption spectra of one-dimensional (1D) interacting electron systems in the framework of the 1D extended Hubbard model. Our targets are halogen-bridged (HB) Ni(Ni-Br) complex and ${\mathrm{Sr}}_{2}{\mathrm{CuO}}_{3},$ which are typical 1D spin-density-wave or antiferrom…
Physics of Superconductivity and MagnetismMagnetism in coordination complexesOrganic and Molecular Conductors Research
Sun Jin Yun、Yong Shin Kim、Sang‐Hee Ko Park2001-02-05Applied Physics Letters
The CaS:Pb phosphor emitting blue electroluminescence (EL) induced by dimeric Pb2+ luminescent centers was deposited using the controlled atomic layer deposition technique. The effect of the incorporation method and concentration of Pb2+ ions on the color of high luminance CaS:Pb phosphor was investigated at the depos…
Luminescence Properties of Advanced Materials
Boaz Alperson、Israel Rubinstein、Gary Hodes2001-02-05Physical review. B, Condensed matter
We describe the direct observation of surface states on individual CdSe quantum dots by conductive scanning force spectroscopy at room temperature and the dependence of these states on size quantization and humidity conditions. Peaks corresponding to surface states that lie within the gap appear at both voltage polari…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsMolecular Junctions and Nanostructures
Jiunn-Ren Roan2001-02-05Physical Review Letters
The interactions between nanoparticles coated by end-grafted homopolymers of comparable size are studied using Edwards' self-consistent field (SCF) theory. The equilibrium monomer density distribution is obtained by solving the SCF equations in bispherical coordinates. It is shown that, because of the spherical geomet…
Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers
S. Carniato、Yi Luo、Hans Ågren2001-02-05Physical review. B, Condensed matter
Copper tetraazaporphyrin is used as a model for copper phthalocyanine in theoretical simulations of the features observed at the Cu ${L}_{2,3}$ near-edge x-ray absorption spectra. Theoretical results obtained by a density-functional theory approach provided interpretations of the different features observed experiment…
Porphyrin and Phthalocyanine ChemistryElectrochemical Analysis and ApplicationsElectron and X-Ray Spectroscopy Techniques
Yongqiang Jiang、P.T. Wilson、M. C. Downer 等 5 位作者2001-02-05Applied Physics Letters
We present observations of optical second-harmonic generation (SHG) from silicon nanocrystals embedded in SiO2. SHG sensitivity to Si/SiO2 interface states, charge on the nanocrystals, and particle density gradients is demonstrated. SHG is proven to be a powerful noncontact nondestructive diagnosis tool for characteri…
Silicon Nanostructures and PhotoluminescenceSpectroscopy and Quantum Chemical StudiesSpectroscopy Techniques in Biomedical and Chemical Research
Christian Notthoff、B. Feuerbacher、H. Franz 等 5 位作者2001-02-05Physical Review Letters
The phase selection process during the crystallization of undercooled metallic melts is studied in situ by combining the electromagnetic levitation technique with energy dispersive x-ray diffraction of synchrotron radiation. The crystallization of metastable bcc phase in binary Ni-V alloys was identified. A metastable…
Metallic Glasses and Amorphous AlloysSolidification and crystal growth phenomenaMetallurgical Processes and Thermodynamics
Md. Nazrul Islam、Satyendra Kumar2001-02-05Applied Physics Letters
First-order Raman spectra from nanocrystalline semiconductors reflect the influence of crystallite sizes on the Raman shifts and line shapes. A Gaussian distribution in crystallite sizes is explicitly included to calculate the Raman spectra of porous silicon. Several porous-silicon samples were prepared using electroc…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Hideki Masuda、Masato Yotsuya、Mari Asano 等 7 位作者2001-02-05Applied Physics Letters
The self-repair of an ordered pattern of nanometer dimensions based on the self-compensation properties of anodic porous alumina is demonstrated. In a pretextured pattern formed on Al using the nanoindentation process with an array of convexes, the deficiency sites of the pattern were found to be compensated automatic…
Nanofabrication and Lithography TechniquesAnodic Oxide Films and NanostructuresNanoporous metals and alloys