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Chemistry and Properties of Nanocrystals of Different Shapes

Clemens Burda、Xiaobo Chen、Radha Narayanan 等 4 位作者2005-06-16ChemInform

Abstract For Abstract see ChemInform Abstract in Full Text.

Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesCopper-based nanomaterials and applications

New Polymorphs of ROY and New Record for Coexisting Polymorphs of Solved Structures

Shuang Chen、Ilia A. Guzei、Lian Yu2005-06-16Journal of the American Chemical Society

With six polymorphs coexisting at room temperature, 5-methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarbonitrile (ROY) is the top system in the current Cambridge Structural Database (Feb. 2005) for the number of polymorphs of solved crystal structures. Here we report two new ROY polymorphs, Y04 and YT04, and the crystal…

Calcium Carbonate Crystallization and InhibitionPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Characterization

First Principles Study of Work Functions of Single Wall Carbon Nanotubes

Bin Shan、Kyeongjae Cho2005-06-16Physical Review Letters

We perform first principles calculations on work functions of single wall carbon nanotubes, which can be divided into two classes according to tube diameter (D). For class I tubes (D > 1 nm), work functions lie within a narrow distribution (approximately 0.1 eV) and show no significant chirality or diameter dependence…

Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications

Synthesis of ZnO Nanocrystals with Cone, Hexagonal Cone, and Rod Shapes via Non‐Hydrolytic Ester Elimination Sol–Gel Reactions

Changhee Joo、Soon Gu Kwon、Jinha Yu 等 4 位作者2005-06-16Advanced Materials

ZnO nanocrystals with various shapes (see Figure) have been synthesized via non-hydrolytic ester elimination sol–gel reactions between zinc acetate and 1,12-dodecanediol. Uniform anisotropic cone-shaped, hexagonal cone-shaped, and rod-shaped ZnO nanocrystals have been synthesized using various surfactants.

ZnO doping and propertiesQuantum Dots Synthesis And PropertiesCopper-based nanomaterials and applications

Optical Properties of Gold Nanorods: DDA Simulations Supported by Experiments

Arnaud Brioude、Xuchuan Jiang、M. P. Pileni2005-06-16OpenAlex

Simulations of the absorption efficiency using the discrete dipole approximation (DDA) method and taking into account the real shape of gold nanorods are reported. A dominant surface plasma band corresponding to the longitudinal resonance is observed. Its maximum position lambda(max) shifts to the red as the aspect ra…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNanocluster Synthesis and Applications

Near-Field Two-Photon-Induced Photoluminescence from Single Gold Nanorods and Imaging of Plasmon Modes

Kohei Imura、Tetsuhiko Nagahara、Hiromi Okamoto2005-06-16OpenAlex

We investigated the two-photon-induced photoluminescence properties of single gold nanorods by scanning near-field spectroscopy. The process was found to be initiated by a sequential one-photon absorption for creating a pair of an electron and a hole in the sp and d bands. Photoluminescence is then radiated when the e…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNear-Field Optical Microscopy

Die-Casting Capabilities of Heat Resistant Mg-Al-Ca Alloys

Jeong Min Kim、Bong Koo Park、Joong Hwan Jun 等 5 位作者2005-06-15Materials science forum

This DOI is not currently attached to any metadata records. DOIs can’t actually ever be deleted (they’re persistent), but sometimes our members create DOIs in error. We do have a process to approximate deletion which we follow only in rare cases where the DOI has been genuinely created in error, and most crucially, if…

Magnesium Alloys: Properties and ApplicationsAluminum Alloy Microstructure PropertiesAluminum Alloys Composites Properties

Contact Fracture Behaviors of Ti<sub>3</sub>SiC<sub>2</sub> Synthesized by Hot Pressing Using TiC<sub>x</sub> and Si Powder Mixture

Sung Sic Hwang、Sang Whan Park、Seong Jai Cho 等 4 位作者2005-06-15Materials science forum

The contact fracture behaviors of fine-grained Ti3SiC2 and coarse-grained high purity Ti3SiC2 are examined by the Hertzian indentation and Vickers indentation technique. The Vickers hardness of bulk Ti3SiC2 is as low as 5.3~6.3 Gpa, and the Hertzian contact stress-strain curves for Ti3SiC2 deviate much from linearity,…

Advanced ceramic materials synthesisMXene and MAX Phase MaterialsAdvanced materials and composites

Sol-Gel Derived TiO<sub>2</sub> Coating for Chemical Protection of Stainless Steel

Dae Yong Shin、Kyung Nam Kim、Sang-Mok Han2005-06-15Materials science forum

Sol-gel coatings of TiO2 have been prepared from TiO2 sol and deposited by a dip-coating technique on 316L stainless steel sheets to study their electrochemical behavior in corrosive solutions. The influence of the coatings on the chemical corrosion of the substrate was evaluated by potentiodynamic polarization curves…

Corrosion Behavior and InhibitionMetal and Thin Film MechanicsHigh-Temperature Coating Behaviors

Overcoming protein denaturation caused by irradiation in a high-flux synchrotron radiation circular dichroism beamline

Robert W. Janes、Alison Cuff2005-06-15Journal of Synchrotron Radiation

It has been established that the new circular dichroism beamline CD12 has sufficiently high flux at low wavelengths to cause apparent irradiation problems with protein samples while their synchrotron radiation circular dichroism (SRCD) spectra are being collected. The cause of this effect has been extensively investig…

Protein Structure and DynamicsProtein purification and stabilityEnzyme Structure and Function

Optical Properties of Bi<sub>2</sub>O<sub>3</sub>-ZnO-SiO<sub>2</sub> Glass System for Eco Transparent Dielectric in PDP

Jae Sam Jeon、Myung-Ryoung Cha、Hyung Sun Kim2005-06-15Materials science forum

To replace lead oxide glass, Bi2O3-SiO2-ZnO glass, as a Pb-free glass, was examined for optical properties for a transparent dielectric layer of a plasma display panel (PDP). The glass was evaluated for glass transition temperature (Tg) and thermal expansion coefficient (α). The transparent thick films produced with a…

Glass properties and applicationsSurface Roughness and Optical MeasurementsPigment Synthesis and Properties

Preparation of K<sub>2</sub>O-CaO-P<sub>2</sub>O<sub>5</sub> Eco-Glass Fertilizers and Effect in Crops

Hoi Kwan Lee、Sheng Jian Hwang、Won Ho Kang2005-06-15Materials science forum

For the application of environment conscious glass-fertilizer, K2O-CaO-P2O5 glasses were fabricated by melt-quenching process, and the dissolution properties of these glasses were investigated using pH meter and ICP analyzer. Additionally, the fertilizer effects on rice culture were evaluated. The pH values depended o…

Glass properties and applicationsRecycling and utilization of industrial and municipal waste in materials productionPigment Synthesis and Properties

Circular magnetization process of nanocrystalline wires as deduced from impedance measurements

Y.-F. Li、M. Vázquez、D.-X. Chen2005-06-15Journal of Applied Physics

The circular magnetization process of FeSiBCuNb amorphous and nanocrystalline wires has been followed by the impedance measurements as a function of the amplitude and the frequency of driving current. The domain structure and consequently, the magnetization process have been tailored by suitable thermal processing. Th…

Magnetic properties of thin filmsMetallic Glasses and Amorphous AlloysMagnetic Properties and Applications

Hardness and Wear Resistance of Reaction Bonded SiC-B<sub>4</sub>C Composite

Kee Sung Lee、In Sub Han、Yong Hee Chung 等 5 位作者2005-06-15Materials science forum

Hardness and wear resistant characteristics of reaction-bonded silicon carbides with boron carbide additions are evaluated relative to those of reaction bonded silicon carbide (RBSC). The reaction-bonded SiC-B4C composites exhibit a distinctive improvement of hardness and wear resistance, indicative of high resistance…

Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdvanced materials and composites

Physical structures of SiO2 ultrathin films probed by grazing incidence x-ray reflectivity

Yasushi Azuma、Jiangwei Fan、Isao Kojima 等 4 位作者2005-06-15Journal of Applied Physics

The effects of contamination overlayer and density as well as surface and interface roughnesses on the x-ray reflectivity of a SiO2 ultrathin film are discussed from viewpoints of experiment and theory. Grazing incidence x-ray reflectivity (GIXRR) is used to accurately measure physical structures of SiO2 ultrathin fil…

Semiconductor materials and devicesAdvancements in Photolithography TechniquesElectron and X-Ray Spectroscopy Techniques

Effect of Heterocyclic Based Organoclays on the Properties of Polyimide–Clay Nanocomposites

P. Santhana Gopala Krishnan、Mangala Joshi、Prachur Bhargava 等 5 位作者2005-06-15Journal of Nanoscience and Nanotechnology

Polyimide-clay nanocomposites were prepared from their precursor, namely, polyamic acid, by the solution-casting method. Organomodified montmorillonite (MMT) clay was prepared by treating Na+MMT (Kunipia F) with three different intercalating agents, namely, piperazine dihydrochloride, 1,3-bis(4-piperidinylpropane) dih…

Polymer Nanocomposites and PropertiesSynthesis and properties of polymersTribology and Wear Analysis

Relationships between diatoms and the environment in Spanish reservoirs

Ana I. Negro2005-06-15Limnetica

Diatoms are very useful environmental indicators in limnological and paleolimnological studies. Spanish reservoirs offer a valuable opportunity for the study of relationships between diatoms and environmental conditions, since these ecosystems are abundant in this country and the patterns of their regional limnology a…

Aquatic Ecosystems and Phytoplankton DynamicsDiatoms and Algae ResearchAquatic Invertebrate Ecology and Behavior

Effects of Yttrium on the Sintering and Microstructure of Alumina–Silicon Carbide “Nanocomposites”

Alex M. Cock、I. Shapiro、Richard I. Todd 等 4 位作者2005-06-15Journal of the American Ceramic Society

Alumina and alumina‐based “nanocomposites” with 2 and 5 vol% silicon carbide and varying amounts of yttria (0–1.5 wt%) have been prepared by pressureless sintering in the temperature range 1450°–1650°C. The effects of composition and sintering temperature on density and microstructure are reported. Yttria inhibited si…

Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdvanced materials and composites

Coarse-grained rigid blob model for soft matter simulations

Sheng D. Chao、Joel D. Kress、Antonio Redondo2005-06-15The Journal of Chemical Physics

We have developed a coarse-grained multiscale molecular simulation method for soft matter systems that directly incorporates stereochemical information. We divide the material into disjoint groups of atoms or particles that move as separate rigid bodies; we call these groups "rigid blobs," hence the name coarse-graine…

Material Dynamics and PropertiesBlock Copolymer Self-Assembly

Molecular Thermodynamics for Swelling of a Mesoscopic Ionomer Gel in 1:1 Salt \nSolutions

Alexey I. Victorov、Clayton J. Radke、John M. Prausnitz2005-06-15eScholarship (California Digital Library)

For a microphase-separated diblock copolymer ionic gel swollen in salt solution, a molecular-thermodynamic model is based on the self-consistent field theory in the limit of strongly segregated copolymer subchains.The geometry of microdomains is described using the Milner generic wedge construction neglecting the pack…

Hydrogels: synthesis, properties, applicationsMaterial Dynamics and PropertiesElectrostatics and Colloid Interactions