Dario Iarossi、Adele Mucci、Francesca Parenti 等 8 位作者2001-02-02Chemistry - A European Journal
A regioregular head-to-head/ tail-to-tail poly(beta,beta'-disubstituted bithiophene) P1 was synthesised by chemical and electrochemical polymerisation of 2,2'-bithiophene that bears (S)-2-methylbutylsulfanyl chains in the beta and beta'-positions. The polymer was characterised by GPC, NMR and UV/Vis spectroscopy, CD,…
Conducting polymers and applicationsElectrochemical Analysis and ApplicationsPhotochromic and Fluorescence Chemistry
Alain Borel、Lothar Helm、André E. Merbach2001-02-02Chemistry - A European Journal
The structure and dynamics of the surrounding water were studied through molecular dynamics (MD) simulations for several GdIII polyaminocarboxylate and polyaminophosphonate complexes in aqueous solution. The radial distribution functions (rdf) show that a few water molecules are bonded to the ligand through hydrogen b…
Lanthanide and Transition Metal ComplexesAdvanced NMR Techniques and ApplicationsElectron Spin Resonance Studies
Jonathan L. Sessler、Daniel Seidel、Anne E. Vivian 等 6 位作者2001-02-02Angewandte Chemie
Beseitigung von radioaktivem Abfall, egal welchen Ursprungs, ist ein wichtiges Problem, zu dessen Lösung der expandierte Porphyrinligand 1 beitragen könnte: Sowohl mit Uranyl- (UO22+) als auch mit Neptunyl-Ionen (NpO2+) bildet er stabile Komplexe.
Porphyrin and Phthalocyanine ChemistryRadioactive element chemistry and processingLanthanide and Transition Metal Complexes
Maaike de Loos、Jan H. van Esch、Richard M. Kellogg 等 4 位作者2001-02-02Angewandte Chemie
Chirale Erkennung in Organogelen findet statt bei der Aggregation des chiralen Gelbildners 1 mit der chiralen Gastverbindung 2. Die diastereomeren Aggregate, die aus (R,R)-2 und (R,R)-1 bzw. (S,S)-1 entstehen, zeigen deutlich unterschiedliches strukturelles Verhalten. Kooperativität trägt hier wesentlich zur chiralen…
Metal-Organic Frameworks: Synthesis and ApplicationsMolecular Sensors and Ion DetectionSupramolecular Self-Assembly in Materials
Chang Seop Hong、Wan Seop Kim、Nam Hwi Hur2001-02-02Physical review. B, Condensed matter
The transport and magnetic properties of single crystals of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ $(x=0.2,$ 0.3) have been investigated. The transport and magnetization results of the ferromagnetic insulator, ${\mathrm{La}}_{0.8}{\mathrm{Ca}}_{0.2}{\mathrm{MnO}}_{3},$ are quite differen…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsMagnetic Properties of Alloys
Hideo Ohno2001-02-02Science
Traditional semiconductor technology is based entirely on exploiting electron charge. Researchers are now investigating ways to use both electronic properties and electron spin simultaneously in semiconductors. The goal is the development of spintronic devices that integrate processing and storage capabilities thus fa…
ZnO doping and propertiesPerovskite Materials and ApplicationsCopper-based nanomaterials and applications
S. Ruppert、Stanley I. Sandler、Abraham M. Lenhoff2001-02-02Biotechnology Progress
A correlation between the osmotic second virial coefficient and the solubility of proteins is derived from classical thermodynamics to support an empirical relation previously found by Wilson and co-workers (1). The model is based on the equality of fugacities of the protein in the equilibrium phases, with the details…
Proteins in Food SystemsMaterial Dynamics and PropertiesCrystallization and Solubility Studies
Alexey B. Kuzmenko、D. van der Marel、P. J. M. van Bentum 等 6 位作者2001-02-02Physical review. B, Condensed matter
Optical properties of single-crystal monoclinic CuO in the range $70--6000 {\mathrm{cm}}^{\ensuremath{-}1}$ were studied at temperatures from 7 to 300 K. Normal reflection spectra were obtained from the (001) and (010) crystal faces thus giving separate data for the ${A}_{u}$ and ${B}_{u}$ phonon modes excited in the…
Physics of Superconductivity and MagnetismZnO doping and propertiesCopper-based nanomaterials and applications
Z. Q. Yang、R. Hendrikx、Y. Qin 等 5 位作者2001-02-02arXiv
La1-xCaxMnO3 (x = 0.3; LCMO) films of different thickness were sputter-deposited on SrTiO3(100) (STO) single crystal substrates with and without YBa2Cu3O7-d (YBCO) as template layer. The electric and magnetic properties and the microstructure of the films were studied. Clear differences in the out-of-plane lattice par…
Materials Science
Shengtai He、Jiannian Yao、Peng Jiang 等 8 位作者2001-02-02Langmuir
1-Nonanethiol-capped silver nanoparticles of about 4.18 nm in diameter were prepared using a liquid−liquid two-phase method. Two-dimensional ordered superlattices of the nanoparticles were formed on carbon films coated on transmission electron microscopy (TEM) copper grids by evaporating a drop of the dispersion in ch…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And Propertiesnanoparticles nucleation surface interactions
Antonio Rodríguez‐Fortea、Pere Alemany、Santiago Álvarez 等 4 位作者2001-02-02OpenAlex
A computational study of the exchange coupling is presented for a selected sample of carboxylato-bridged dinuclear copper(II) compounds. Model calculations have been used to examine the influence of several factors on the coupling constants: a) the electron-withdrawing power of the bridging ligands; b) the nature of t…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Yuji Matsumoto、Makoto Murakami、T. Shono 等 10 位作者2001-02-02OpenAlex
Dilute magnetic semiconductors and wide gap oxide semiconductors are appealing materials for magnetooptical devices. From a combinatorial screening approach looking at the solid solubility of transition metals in titanium dioxides and of their magnetic properties, we report on the observation of transparent ferromagne…
ZnO doping and propertiesMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Yu. V. Pakharukov、T. E. Shevnina2001-02-01Technical Physics Letters
A theoretical model is proposed that describes the dependence of foam stability on the surfactant concentration in a foam-forming solution. The model is based on the parameters reflecting a fractal structure and percolation properties of the foam. It is established that a time corresponding to the onset of the liquid…
Enhanced Oil Recovery TechniquesGeological formations and processesPickering emulsions and particle stabilization
Zhuo Wang、Ji Huang、Shaowei Wang 等 10 位作者2001-02-01Ferroelectrics
Transparent and crack-free Bi2Ti2O7 thin films with strong (111) orientation were successfully prepared on n-Si(100) by chemical solution deposition (CSD) using bismuth nitrate and titanium butoxide as starting materials. The growth procedure of the Bi2Ti2O7 thin films is discussed in this paper. The surface morpholog…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesMicrowave Dielectric Ceramics Synthesis
А. М. Зиатдинов、P. G. Skrylnik2001-02-01Ferroelectrics
The results of EPR investigation of improper ferroelastic crystals MgGeF6·6H2O: Mn2+ allow to conclude that at Ti1=403 K these crystals undergo transition to structurally incommensurate phase. The order parameter of this transition is probably the angle of Mg[H2O]6 2+ octahedra rotation around crystal C3 axis, which d…
Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyInorganic Fluorides and Related Compounds
Johannes Roth2001-02-01Ferroelectrics
Shock waves in quasicrystals of the AlCuLi type and in approximant crystals of the C15 Laves phase have been studied by MD simulations. Three regimes are found: at low shock wave intensity the system reacts elastically, at high intensities it is turned amorphous. In the intermediate region we find a continuous transit…
Metallic Glasses and Amorphous AlloysQuasicrystal Structures and PropertiesMineralogy and Gemology Studies
G. Salvago、Luca Magagnin、Massimiliano Bestetti2001-02-01CORROSION
An analogy between the formalism of a probabilistic approach to localized corrosion of stainless steels and the formalism of the classical approach to general corrosion of metals is highlighted. This formal analogy is justified experimentally through the study of the roughness evolution of stainless steels, iron, and…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability
Sun‐Hee Kang、Seung-Ju Lee、Gi-Hyung Ryu2001-02-01Food Engineering Progress
Abstraα πle texture of Korean puffed rice snack(Yukwa) is influenced by dough viscoelasticity, cell size and disσibution in dough which are 와fected by mixing process.Mixing energy input was measured by using an am야remeter and powermeter.ηle effect of steeping time(l, 3, 6 days) and mixing time(5, 10, 15, 20 min.) on m…
Textile materials and evaluations
M. Hamadène、J. Grannec、Anne-Marie Guehria 等 4 位作者2001-02-01Phase Transitions
The phase transitions of two ternary fluorides have been reinvestigated by thermal and X-ray diffraction analyses. Four phase transitions have been detected at T 1 = 483 ± 5 K, T 2 = 548 ± 5 K, T 3 = 765 ± 5 K and T 4 = 867 ± 5 K for Li3AlF6. Only two transformations occurred at T 1 = 550 ± 5 K and T 2 = 660 ± 10 K fo…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
S. Lettieri、P. Maddalena、L. P. Odierna 等 6 位作者2001-02-01Philosophical Magazine B
Measurements of the nonlinear refractive index n 2 of a high-porosity freestanding porous silicon sample are reported at different laser wavelengths by means of the z-scan technique. The results show a negative below-gap nonlinear refractive index, so that thermal contributions to the observed effects can be reasonabl…
Silicon Nanostructures and PhotoluminescenceNonlinear Optical Materials StudiesLaser-Ablation Synthesis of Nanoparticles