Materials Literature
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Infrared spectroscopy was employed to characterize thermal SiO2 layers down to 15 nm thickness. From these measurements, performed in transmission mode under a 30° angle of incidence, we obtained a multiple resonance structure on the high-energy side of the main Si-O stretching vibration at 1075 cm−1. Aside from a lon…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry and physics of the novel molecular-based compound exhibiting a spontaneous magnetization below Tc = 14 K, MnCu(obbz).cntdot.1H2O (obbz = oxamidobis(benzoato)). Comparison with the antiferromagnet MnCu(obbz).cntdot.5H2O. Crystal structure and magnetic properties of…
Homogeneous nucleation of diamond powder is reported. The experiments were performed in a low-pressure microwave-plasma reactor. The deposits were collected downstream of the reaction zone and subjected to wet oxidation to remove nondiamond carbons. The residues were analyzed by optical and electron microscopy, electr…
Growth of high quality crystals has played an important role in sophisticated, modern- day technologies and in recent advances in physics. It has also provided examples in the study of self-organizing dissipative structures. This paper reviews the science of crystal growth and discusses recent data, particularly with…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of a soluble oxide inclusion complex, [CH3CN.cntnd.(V12O324-)]V. W. Day, W. G. Klemperer, and O. M. YaghiCite this: J. Am. Chem. Soc. 1989, 111, 15, 5959–5961Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Pub…
The conductivity and Seebeck coefficient of the perovskite‐type oxides La 1 − x Sr x CoO 3 − δ ( x = 0 – 0.7 ) were measured in 10 – 5 − 1 atm O 2 gas at temperatures 25°–1000°C. The results are discussed in relation to the lattice‐parameter and oxygen non‐stoichiometry. Close relationships were found between the temp…
The birefringent property of obliquely deposited metal oxides was studied with a view to applying it to optical retardation plates. By finding favorable conditions to form transparent films of large retardation and low opacity, we developed homogeneous quarterwave plates with a bilayered structure 60 x 250 mm in size…
Nonresonant second-order microscopic nonlinear-optical susceptibilities (β) of a series of organic conjugated π-electron molecules were measured, using dc-induced second-harmonicgeneration. This study confirms structure–property relationships that affect β, including the electronic properties of substituents, the leng…
Results of sliding wear tests on three alumina ceramics with different grain sizes are discussed in the light of crackresistance (R‐curve, or T‐curve) characteristics. The degree of wear increases abruptly after a critical sliding period, reflecting a transition from deformation‐controlled to fracture‐controlled sulfa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and electronic structures of conductive anion-radical salts, (2,5-R1R2-DCNQI)2Cu (DCNQI = N,N'-dicyanoquinonediimine; R1, R2 = CH3, CH3O, Cl, Br)Reizo Kato, Hayao Kobayashi, and Akiko KobayashiCite this: J. Am. Chem. Soc. 1989, 111, 14, 5224–5232Publication Date (Pri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFunctionalized polypyrroles. New molecular materials for electrocatalysis and related applicationsAlain Deronzier and Jean Claude MoutetCite this: Acc. Chem. Res. 1989, 22, 7, 249–255Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published…
Abstract The results of an experimental study of the temperature ( T ) dependent dc conductivity σ dc , T ‐dependent thermoelectric power (TEP), and electron spin resonance in a new conducting polyethylenevinylacetate–polyoctylthiophene (EVAPOT) polymer blend doped with FeCl 3 are presented. For a POT content of 20 wt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical Surface ScienceCite this: Anal. Chem. 1989, 61, 13, 814APublication Date (Print):July 1, 1989Publication History Published online30 May 2012Published inissue 1 July 1989https://doi.org/10.1021/ac00188a748RIGHTS & PERMISSIONSArticle Views23Altmetric-Citations-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSinglet molecular oxygen (1.DELTA.gO2) formation upon irradiation of an oxygen (3.SIGMA.g-O2)-organic molecule charge-transfer absorption bandRodger D. Scurlock and Peter R. OgilbyCite this: J. Phys. Chem. 1989, 93, 14, 5493–5500Publication Date (Print):July 1, 1989Publicati…
We show that under compression on a Langmuir trough, a surfactant monolayer may have a mechanical instability similar to the buckling instability of a beam or a plate. In the buckled state, the wavelength of the surface undulations is the capillary length resulting from the balance between gravity and curvature energy…
A bismuth sodium titanate, (BiNa)1/2 TiO3 (BNT)-based solid solutions, (1−x) (BiNa)1/2TiO3 + x(a·SrTi03 +b·PbTiO3 +c·CaTiO3) (a + b + c = l), (BNTX [100x-100a/100b/100c]), were studied for their dielectric, piezoelectric and pyroelectric properties. X-ray diffraction data show that a rhombohedra1 (Fα-tetragonal (Fβ) p…
The intense acoustic wave generated at the focus of an extracorporeal shock wave lithotripter is modeled as the impulse response of a parallel RLC circuit. The shock wave consists of a zero rise time positive spike that falls to 0 at 1 microsecond followed by a negative pressure component 6 microseconds long with ampl…
The roots of the chemistry of conventional rod-like liquid crystals are briefly considered. The low-molecular-weight liquid crystals are analysed in terms of rigid groups (rod-like and disc-like ring systems), flexible groups, polar groups and short, linking segments. On the basis of this analysis, the liquid-crystall…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-state CP/MAS carbon-13 NMR study of cellulose polymorphsAkira Isogai, Makoto Usuda, Takashi Kato, Toshiyuki Uryu, and Rajai H. AtallaCite this: Macromolecules 1989, 22, 7, 3168–3172Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Publi…
The phase, designated as Sm C A * , which shows tristable switching was investigated in C 8 H 17 O– - -COO– -COO * CH(CH 3 )C 6 H 13 (MHPOBC) by means of thermal analyses, a miscibility test and microscope observation. The phase transition from Sm C * to Sm C A * is not observable by AC calorimetry but small peaks com…