Materials Literature
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Copper nitride thin films were prepared by using the ion-assisted deposition in which accelerated nitrogen ions were irradiated during the deposition of copper metal. The degree of nitrification of the film was controlled by changing the ion current density. The reflection coefficient of the prepared copper nitride fi…
Gd(hfac),NITiPr (hfac = hexafluoroacetylacetonate;N ITiPr = 2-isopropyl-4,4,5,5-tetramethyl-4,5-dihy1rH o--i midazolyl-l- oxy1 3-oxide) crystallizes in the monoclinic space group P 2 , / n with cell parameters a = 11.916 (1) A, b = 17.625 ( 9 ) A, c = 18.055 ( I ) A, j3 = 96.98 (I)’, V = 3763.82 A’, and Z = 4. The str…
Abstract Samples of Na-saturated, Upton montmorillonite were prepared with different contents of water (H 2 O or D 2 O) by: (1) adsorption of water from the vapor phase at a specific value of p/p°, the relative humidity, (2) adsorption of water from the vapor phase at p/p° = 1.0 followed by desorption of the water int…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of poly(iε-caprolactone)Hengliang Hu and Douglas L. DorsetCite this: Macromolecules 1990, 23, 21, 4604–4607Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published inissue 1 October 1990https://pubs.acs.org/doi/10.1021…
Volatility diagrams—isothermal plots showing the partial pressures of two gaseous species in equilibrium with the several condensed phases possible in a system—are discussed for the Si‐O and Si‐N systems, and extended to the Si‐N‐O and Si‐C‐O systems, in which the important ceramic constituents SiO 2 , Si 3 N 4 , Si 2…
Abstract In this investigation, the plastic flow of polycarbonate (PC) was examined by obtaining true stress‐strain data over a range of strain rates at room temperature through homogeneous, uniaxial, constant strain rate compression testing to strains as high as 125 percent. Uniaxial compressive loading conditions gi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtein microencapsulation of nonaqueous liquidsKenneth S. Suslick and Mark W. GrinstaffCite this: J. Am. Chem. Soc. 1990, 112, 21, 7807–7809Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published inissue 1 October 1990https://pubs.acs…
Human coronavirus (HCoV) infection causes respiratory diseases with mild to severe outcomes. In the last 15 years, we have witnessed the emergence of two zoonotic, highly pathogenic HCoVs: severe acute respiratory syndrome coronavirus (SARS-CoV) and ...Read More
Abstract Careful curve fitting is needed when using XPS to investigate oxidized functional groups on carbon‐fibre surfaces. This is important because the core regions often contain a number of overlapping features some of which are of low intensity, and the C 1s region is influenced by an asymmetric graphitic feature.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPotential dependence of the conductivity of highly oxidized polythiophenes, polypyrroles, and polyaniline: finite windows of high conductivityDavid Ofer, Richard M. Crooks, and Mark S. WrightonCite this: J. Am. Chem. Soc. 1990, 112, 22, 7869–7879Publication Date (Print):Octo…
The low‐field electrical behavior of relaxor ferroelectric ceramics has been qualitatively described by many parameters, including diffuseness (δ), which characterizes the breadth of the transition peak and is roughly related to the standard deviation of the peak. Three major types of equations have been used to calcu…
N-Carboxybutyl chitosan, a modified chitin of crustacean origin, displayed inhibitory, bactericidal, and candidacidal activities when tested against 298 cultures of various pathogens. Examination by electron microscopy showed that microbial cells exposed to N-carboxybutyl chitosan underwent marked morphological altera…
Abstract A novel process to produce microcellular thermoplastic parts is described. This is achieved by integrating the deformation process in the foaming cycle in such a way that the cell nucleation and growth processes are effectively uncoupled from deformation. The nitrogen‐polystyrene system is studied and the rel…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Phonon frequencies and eigenvectors have been computed from first principles for the three optic ${\mathit{F}}_{1\mathit{u}}$ modes in ${\mathrm{BaTiO}}_{3}$ using the full-potential linearized-augmented-plane-wave method. We find that the ferroelectric instability in ${\mathrm{BaTiO}}_{3}$ can be understood from calc…
This review covers recent experimental and theoretical investigations into cooperative phenomena in crystals containing off-center ions. These phenomena have attracted much attention in recent years because of a general interest in disordered systems, in particular in spin glasses, whose electrical analog is the dipol…
This review summarizes experimental evidence for the freezing of reorienting moments in solids. The moments may be of dipolar or quadrupolar nature, or both; they belong to one of the constituents of a mixed-crystal solid. Extensive results are reported for the following systems: KCl doped with hydroxyl, potassium tan…
The scaling behavior of the elastic properties of colloidal gels that are well above the gelation threshold is studied both theoretically and experimentally. A scaling theory was developed by considering the structure of the gel network as a collection of flocs, which are fractal objects closely packed throughout the…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
1. Spectroscopy and Electronic Structure of Inorganic Solids 2. Energy Levels of Free Atoms and of Optical Centres in Crystals 3. Symmetry and Group Representation Theory 4. Radiative Transition Rates and Selection Rules 5. Electronic Centres in a Vibrating Crystalline Environment 6. Experimental Techniques 7. Colour…