Materials Literature
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PART I: INTRODUCTION 1. Materials Science PART II: COLOUR AND OTHER OPTICAL PROPERTIES OF MATTER PART III: THERMAL PROPERTIES OF MATERIALS PART IV: ELECTRICAL AND MAGNETIC PROPERTIES OF MATTER PART V: MECHANICAL PROPERTIES OF MATERIALS Appendix 1: Fundamental Physical Constants Appendix 2: Unit Conversions Appendix 3:…
Paraffin waxes, commonly used as binders in ceramic-forming processes, can be removed from ceramic bodies with supercritical carbon dioxide. Therefore, the solubility of three industrial paraffin waxes (melting at 42, 52, and 62 °C, respectively) in supercritical CO 2 was investigated. The concentrations of these para…
Selective oxidation of water-containing ethanol in the presence of excess ethanol provides a one-step preparation of ethyl acetate. Acetic acid is formed from the oxidation of ethanol catalyzed by a supported Pd catalyst and is further catalytically esterified to ethyl acetate by the protons dissociated from acetic ac…
The utility of surface-enhanced Raman scattering (SERS) for characterizing phonon and related interfacial vibrations within ultrathin semiconductor layers on gold substrates is demonstrated, specifically for cadmium chalcogenide (CdSe, CdS) films formed by electrochemical atomic layer epitaxy. The occurrence of quantu…
Spectrofluorometry (pyrene and dipyrenylpropane emission spectra) and time-resolved fluorescence quenching have been used to study the effect of addition of a large excess of sodium hydroxide and sodium silicate on the properties of micelles of cetyltrimethylammonium bromide and chloride (CTAB and CTAC). The systems i…
Polyamidoamine dendrimers, constructed on the surface of silica, were phosphonated by using diphenylphosphinomethanol, prepared in situ, and complexed to rhodium by use of [Rh(CO) 2 Cl] 2 . Excellent selectivities, favoring the branched aldehydes obtained from aryl olefins and vinyl esters, were observed by using the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopy of Single CdSe NanocrystallitesStephen Empedocles and Moungi BawendiView Author Information Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Cite this: Acc. Chem. Res. 1999, 32, 5, 389–396Publication Date (Web):March 17, 1999Publication Hist…
This paper develops the use of wavelets as a basis set for the solution of physical problems exhibiting behavior over wide-ranges in length scale. In a simple diagrammatic language, this article reviews both the mathematical underpinnings of wavelet theory and the algorithms behind the fast wavelet transform. This art…
\n\t\t\t\t\tA theoretical analysis on the electrochemical noise resistance is carried out based on basic electrochemical corrosion theory. It is proven that the noise resistance is equivalent to the polarisation resistance and is in fact a special form of linear polarisation resistance, namely statistical linear polar…
To assess the oxidizing capacity of [Co(β-diketonate) 2 (L)OOR] complexes, four such species, namely, [Co(acac) 2 (L)(OO t Bu)] (acacH = acetylacetone; L = pyridine (py) ( 1 ), 4-methylpyridine (4-Mepy) ( 2 ), 1-methylimidazole (1-MeIm) ( 3 )) and [Co(dbm) 2 (py)(OO t Bu)] ( 4, dbmH = dibenzoylmethane), have been synt…
The molecular dynamics of semicrystalline poly(ether ether ketone) (PEEK) was studied over a broad dynamic range from 10 -1 to 10 9 Hz by combining dielectric spectroscopy (DS) and incoherent quasielastic neutron scattering (IQNS). This allowed us to characterize the polymer dynamics in the glassy, semicrystalline, an…
The pore structure of zeolite Y consists of 13 Å supercages connected through 7 Å windows. This study deals with the intrazeolitic photoelectron transfer from trisbipyridyl ruthenium (II) (Ru(bpy) 3 2+ ) synthesized within zeolite Y supercages to ion-exchanged bipyridinium molecules in neighboring supercages. Three N,…
Oriented polymer/silica composites have been synthesized by incorporating the conjugated semiconducting polymer MEH-PPV into the pores of an aligned, hexagonally ordered mesoporous silica. The ordered silica framework is synthesized by a silica/surfactant coorganization process that proceeds via a silicate/surfactant…
The photochemistry of CH 3 OH (a) and CH 3 O (a) adsorbed on TiO 2 and the effect of O 2 have been studied by infrared spectroscopy and mass spectrometry. In the absence of O 2, CH 3 OH (a) desorbs molecularly, while CH 3 O (a) decomposes to form CH 2 O (g) under UV irradiation. The rate of CH 3 O (a) decomposition re…
Phthalocyaninatosilicon(IV) covalently linked to a 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) radical, SiPc-TEMPO, has been studied by time-resolved electron paramagnetic resonance (TREPR). A TREPR spectrum at 20 K is assigned to the doublet ground (D 0 ) state and the excited quartet (Q 1 ) state consisting of the…
Interactions of nitroxide-labeled polyamidoamine dendrimers of generations 2 and 6 (2SBD-T and 6SBD-T, respectively) with double-stranded polynucleotides Calf Thymus DNA (C.T.DNA), poly(deoxyadenylic−deoxythymidylic acid) (termed Poly(AT)), poly(deoxyguanylic−deoxycytidylic acid) (termed Poly(GC)), and a double-strand…
A series of novel aromatic polyimides that contain bis(2,2‘:6‘,2‘ ‘-terpyridine) ruthenium(II) complex was synthesized, and their optoelectronic properties were studied. The absorption of the polymers at 500 nm was strongly enhanced by the ruthenium complex. As a result, the photosensitivity of the polymers in the vis…
Thermogravimetric analysis (TGA), X-ray diffraction (XRD), BET areas, FT-IR spectroscopy, scanning electron microcopy (SEM) and temperature programmed reduction (TPR) techniques were performed to characterize copper−aluminum mixed-oxide samples with Cu/Al ratios between 0.5 and 3.0. The thermal stability, crystallinit…
The thermal decomposition pathways leading to the formation of volatile compounds and to char residue in poly(bisphenol A carbonate) ( PC ), poly(resorcinol carbonate) ( PRC ), and poly(hydroquinone carbonate) ( PHC ) have been investigated by mass spectrometry. The structure of the volatile compounds obtained in the…
We have recently developed some simple continuum models of static granular media which display "fragile" behaviour: they predict that the medium is unable to support certain types of infinitesimal load (which we call "incompatible" loads) without plastic rearrangement. We argue that a fragile description may be approp…