Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Based on the results of total-energy calculations using the full-potential linear muffin-tin orbital method, the equilibrium ground-state structure is determined in perovskite-type ${\mathrm{KNbO}}_{3}$ and ${\mathrm{KTaO}}_{3}$ complex oxides. The first compound is found to have a ferroelectric zero-temperature groun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplementarity and internal consistency between magnetic and optical properties for the manganese(II) copper(II) heterodinuclear compound [Mn(Me6-[14]ane-N4)Cu(oxpn)](CF3SO3)2 (Me6-[14]ane-N4 = (.+-.)-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane; oxpn = N,N'-…
Pb(Zr, Ti)O 3 thin films of thickness ranging from 55 nm to 625 nm were synthesized on Pt/Ti/SiO 2 /Si substrates using a sol-gel process. The film thickness dependence of both microstructure and electrical properties was investigated. The synthesized films showed columnar structure. The diameter of each column was ar…
Incorporation of polyethylene glycol-derivatized phospholipids into liposomes results in carriers that can enhance the therapeutic efficacy of encapsulated drugs by imparting the ability to evade the reticuloendothelial system and remain in the circulation for prolonged periods. In this study, doxorubicin encapsulated…
Abstract The effect of water vapor and SO2 on the selective reduction of nitric oxide over alumina-supported Ag, In, Ga, Sn, and Zn catalysts has been investigated. Water vapor and SO2 had large effect on the reactivity of propene and on the reduction of NO over those catalysts.
Si-rich SiO 2 films have been prepared by a rf cosputtering method and their photoluminescence, as well as infrared absorption and Raman spectra, has been measured for the as-deposited and annealed films. Photoluminescence spectra very similar to those of porous Si were observed for the sample with a relatively low Si…
Compressive stress is a widespread phenomenon in films subjected to ion beam bombardment. A thermodynamic treatment of materials under a general stress is used to show that preferred orientation will occur as a result of free energy minimization in a biaxial stress field. The equilibrium between structural phases of m…
The largest cluster characterized to date by a crystal structure analysis , [Cu 146 Se 73 (PPh 3 ) 30 ], forms in the reaction of CuCL with Se(SiMe 3 ) 2 in the presence of PPh 3 in THF. The Cu‐Se core of this huge cluster is shielded perfectly by the PPh 3 ligands. In this way, a molecule with a diameter of about 40…
Multilayer composites of a piezoelectric material and a piezomagnetic material can be designed to exhibit magnetoelectric (ME) effect. Such a composite is electrically polarized when it is placed in a magnetic field or is magnetized when an electric field is applied to it. Since the phases have anisotropic properties,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLeptosphaerones A and B, New Cyclohexenones from Leptosphaeria herpotrichoidesWilliam A. Ayer, Türkan Gökdemir, Shichang Miao, and Latchezar S. TrifonovCite this: J. Nat. Prod. 1993, 56, 9, 1647–1650Publication Date (Print):September 1, 1993Publication History Published onli…
Polarized infrared spectroscopy was used to characterize molecular orientation in polyimide films deposited on silicon wafers. The films were constructed from a single polyimide having a rodlike molecular skeleton. The degree of in-plane orientation at the interface with the wafer in the film varied with film thicknes…
Abstract The case of temperature quenching of luminescence of broad‐band emitters is examined. On the basis of published and newly acquired data, it is concluded that the theory of nonradiative transitions based on coupling to a single vibrational mode, whether calculated in the Mott‐Seitz terms or improved by the pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption and thermal decomposition of methanol on 3d transition metal (iron, nickel, titanium) aluminides: FeAl(110), NiAl, and TiAlBor Ru Sheu and D. R. StronginCite this: J. Phys. Chem. 1993, 97, 39, 10144–10151Publication Date (Print):September 1, 1993Publication Histor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic effects in transition metal porphyrins. 7. Synthesis and spectroscopic investigations of a series of octasubstituted porphyrin isomers and their iron(III) complexesMeden F. Isaac, Qing Lin, Ursula Simonis, Daniel J. Suffian, Debra L. Wilson, and F. Ann WalkerCite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrowave modulated and thermal modulated photoluminescence studies of 2H-lead iodideE. Lifshitz and L. BykovCite this: J. Phys. Chem. 1993, 97, 37, 9288–9292Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September…
Abstract The dielectric behavior of glassy thermoplastic polymer in the microwave frequency range was investigated. Specifically, the relationship between energy absorption and temperature for several thermoplastic systems was examined to test the theoretical basis for heating under microwave irradiation. Irradiation…
Efficient blue light generation by SHG for use in optical storage etc. requires materials that display not only a large nonlinear response and but also optical transparency at the wavelengths of both the laser and the blue light. New chromophores containing sulfonamide, sulfonate, or sulfoximide groups are described t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonitoring jet fuel thermal stability using a quartz crystal microbalanceE. A. Klavetter, S. J. Martin, and K. O. WessendorfCite this: Energy Fuels 1993, 7, 5, 582–588Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1…
Thermal recovery of radiation defects and microstructural change in UO2 fuels irradiated under LWR conditions (burnup: 25 and 44 GWd/t) have been studied after annealing at temperature range of 450-1,800°C by X-ray diffractometry and transmission electron microscopy (TEM). The lattice parameter of as-irradiated fuels…
A new solid solution, (Bi 1- x Pb x )(Ni (1- x )/2 Ti (1+ x )/2 )O 3 (BPNT-100 x ) (0.3≤ x ≤0.5), is studied for their dielectric, ferroelectric, piezoelectric and mechanical properties as a new group of piezoelectric ceramics. The crystal phase of the solid solution is a perovskite structure with x ≥0.3. The BPNT-100…