Paul F. Henry、Mark T. Weller、Chick C. Wilson2001-07-11The Journal of Physical Chemistry B
The first complete investigation of the structure of the selective oxidation catalyst TS-1 is presented. Constant wavelength powder neutron diffraction data collected on isotopically substituted titanium silicalite (TS-1) samples, with a Si:Ti molar ratio of 39:1, have been studied using a combination of single and mu…
Zeolite Catalysis and SynthesisChemical Synthesis and CharacterizationX-ray Diffraction in Crystallography
Yoshimichi Mitamura、Yoshihiko Komori、Shigenobu Hayashi 等 5 位作者2001-07-11Chemistry of Materials
Magadiite, a layered sodium polysilicate, was organically modified by esterification of interlayer silanol groups with various aliphatic alcohols. Methanol was directly reacted with H-magadiite (acid-treated magadiite) by refluxing. The methanol-treated product showed an increase in the basal spacing and the 13 C NMR…
Layered Double Hydroxides Synthesis and ApplicationsClay minerals and soil interactionsBone Tissue Engineering Materials
Thierry Verbiest、Sven Van Elshocht、André Persoons 等 6 位作者2001-07-11Langmuir
We demonstrate second-harmonic generation in highly symmetric thin films of chiral molecules. The films were prepared by spin-coating, and no external force (such as electric field poling) was used to induce noncentrosymmetry. The films have a nonpolar D n symmetry with second-order susceptibility values of 2−9 pm/V.…
Spectroscopy and Quantum Chemical StudiesPhotorefractive and Nonlinear OpticsNonlinear Optical Materials Research
Dayu Zhou、Marc Kamlah、D. Münz2001-07-11Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Polarization and longitudinal strain of the commercial soft PZT piezoceramic PIC151 were measured as a function of amplitude and frequency of an AC electric field. The range of frequencies considered was selected in the quasi-static range from 0.01Hz to 1.0 Hz. The electric field was selected as triangular loading. Be…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesUltrasonics and Acoustic Wave Propagation
Brenda K. Mann、Jennifer West2001-07-11The Anatomical Record
Achieving the lofty goal of developing a tissue engineered heart will likely rely on progress in engineering the various components: blood vessels, heart valves, and cardiac muscle. Advances in tissue engineered vascular grafts have shown the most progress to date. Research in tissue-engineered vascular grafts has foc…
Tissue Engineering and Regenerative MedicineCardiac and Coronary Surgery TechniquesElectrospun Nanofibers in Biomedical Applications
Ryoji Takenawa、Yoshihiko Komori、Shigenobu Hayashi 等 5 位作者2001-07-11Chemistry of Materials
Kaolinite intercalates ortho - and para -nitroanilines ( o NA and p NA) between the layers whereas meta- nitroaniline ( m NA) is not intercalated. para- Nitroaniline takes a monolayer arrangement with the long axis inclined to the layers of kaolinite. o NA molecules also take a monolayer arrangement though the orienta…
Glass properties and applicationsMineralogy and Gemology StudiesClay minerals and soil interactions
Xiaohu Deng、Lanny S. Liebeskind2001-07-11Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Contribution to the Design of Molecular Switches: Novel Acid-Mediated Ring-Closing−Photochemical Ring-Opening of 2,3-Bis(heteroaryl)quinones (Heteroaryl = Thienyl, Furanyl, Pyrrolyl)Xiaohu Deng and Lanny S. LiebeskindView Author Information Emory University, Departme…
Oxidative Organic Chemistry ReactionsOrganic Chemistry Cycloaddition ReactionsPhotochromic and Fluorescence Chemistry
Jacqueline L. Stair、Jeremy J. Harris、Merlin L. Bruening2001-07-11Chemistry of Materials
Layer-by-layer deposition of polyelectrolytes on porous supports is a convenient method for producing ultrathin membranes with moderate ion-transport selectivities. This study shows that the capping of poly(styrene sulfonate) (PSS)/poly(allylamine hydrochloride) (PAH) membranes with a few layer pairs of poly(acrylic a…
Polymer Surface Interaction StudiesFuel Cells and Related MaterialsConducting polymers and applications
Guangshan Zhu、Shilun Qiu、Osamu Terasaki 等 4 位作者2001-07-11Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPolystyrene Bead-Assisted Self-Assembly of Microstructured Silica Hollow Spheres in Highly Alkaline MediaGuangshan Zhu, Shilun Qiu, Osamu Terasaki, and Yen WeiView Author Information Department of Chemistry and State Key Laboratory of Inorganic Synthesis & Preparative…
Mesoporous Materials and CatalysisPolyoxometalates: Synthesis and ApplicationsLayered Double Hydroxides Synthesis and Applications
Olaf Kohlmann、Wayne E. Steinmetz、Xi-An Mao 等 7 位作者2001-07-11The Journal of Physical Chemistry B
NMR spectroscopy and computer modeling were used to characterize tiopronin monolayer-protected gold clusters (MPCs). These MPCs contain gold cores with a distribution of radii ranging from 0.4 to 2.6 nm. NOESY and HMQC spectra yielded assignments for all NMR sensitive nuclei in the tiopronin ligands. DOSY and T 2 expe…
Nanocluster Synthesis and ApplicationsSurface Chemistry and CatalysisGold and Silver Nanoparticles Synthesis and Applications
J. P. Rueff、M. Krisch、F. Sette 等 6 位作者2001-07-11arXiv
The paper has been withdrawn
Materials Science
V. N. Smolyaninova、Amlan Biswas、P. Fournier 等 7 位作者2001-07-11arXiv
We report a study of oxygen isotope effects on low temperature specific heat, magnetization, and resistivity of La$_{1-x}$Ca$_{x}$MnO$_{3}$ and (La$_{1-y}$Pr$_{y})_{0.67}$Ca$_{0.33}$MnO$_{3}$. For the metallic compositions of La$_{1-x}$Ca$_{x}$MnO$_{3}$ and for charge-ordered La$_{0.5}$Ca$_{0.5}$MnO$_{3}$ no change in…
Strongly Correlated ElectronsMaterials Science
Karsten Reuter、Matthias Scheffler2001-07-11arXiv
Using density-functional theory (DFT) we calculate the Gibbs free energy to determine the lowest-energy structure of a RuO_2(110) surface in thermodynamic equilibrium with an oxygen-rich environment. The traditionally assumed stoichiometric termination is only found to be favorable at low oxygen chemical potentials, i…
Materials Science
Michael R. Geller、W. M. Dennis、Vadim A. Markel 等 6 位作者2001-07-11arXiv
We discuss the rich vibrational dynamics of nanometer-scale semiconducting and insulating crystals as probed by localized electronic impurity states, with an emphasis on nanoparticles that are only weakly coupled to their environment. Two principal regimes of electron-phonon dynamics are distinguished, and a brief sur…
Mesoscale and Nanoscale PhysicsMaterials Science
Sergey V. Barabash、David J. Bergman、D. Stroud2001-07-11arXiv
Scaling theory, duality symmetry, and numerical simulations of a random network model are used to study the magnetoresistance of a metal/insulator/perfect conductor composite with a disordered columnar microstructure. The phase diagram is found to have a critical line which separates regions of saturating and non-satu…
Materials Sciencecond-mat.dis-nn
H. O. Jeschke、M. E. Garcia、K. H. Bennemann2001-07-11arXiv
The ultrafast time-dependence of the energy absorption of covalent solids upon excitation with femtosecond laser pulses is theoretically analyzed. We use a microscopic theory to describe laser induced structural changes and their influence on the electronic properties. We show that from the time evolution of the energ…
Materials Science
C. Patrick2001-07-11The Anatomical Record
Tissue engineering is a relatively young field that combines engineering, clinical science, and life sciences to, in part, repair or regrow tissues. Adipose tissue has recently become a focus area for tissue engineering, encouraged by the large number of reconstructive, cosmetic, and correctional indications that coul…
Tissue Engineering and Regenerative MedicineConnective tissue disorders researchElectrospun Nanofibers in Biomedical Applications
T. Katsufuji、H. Takagi2001-07-11OpenAlex
The dielectric constant of quantum paraelectric ${\mathrm{EuTiO}}_{3},$ which contains ${\mathrm{Eu}}^{2+}$ with $S=7/2$ spin and ${\mathrm{Ti}}^{4+},$ has been measured under a magnetic field. The dielectric constant shows a critical decrease at the antiferromagnetic ordering of the Eu spins at 5.5 K, as well as a su…
Multiferroics and related materialsFerroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materials
Rajesh H. Somani、Benjamin S. Hsiao、Aurora Nogales 等 6 位作者2001-07-11OpenAlex
In situ synchrotron wide-angle X-ray diffraction (WAXD) was used to monitor crystallization of isotactic polypropylene (i-PP) in the subcooled melt at 140 °C after step shear. The melt was subjected to a shear strain of 1430% at three different shear rates (10, 57, and 102 s -1 ) using a parallel-plate shear apparatus…
Polymer Nanocomposites and PropertiesPolymer crystallization and propertiesbiodegradable polymer synthesis and properties
I. R. Nasimova、Е. Е. Махаева、Alexei R. Khokhlov2001-07-10Journal of Applied Polymer Science
Abstract The complex formation of organogels based on poly( N ‐vinylcaprolactam) (PVCa) and organic dyes [5‐(4‐dimethylaminobenzylidene) rhodanine, α‐nitroso‐β‐naftol, and dithizone] and the properties of the complexes in salt aqueous solutions were studied. PVCa gels absorbed these dyes in organic media (ethanol and…
Hydrogels: synthesis, properties, applicationsPhotochromic and Fluorescence ChemistrySurfactants and Colloidal Systems