Materials Literature
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The second order para-ferromagnetic phase transition in a series of amorphous alloys (Fe{_5}Co{_{50}}Ni{_{17-x}}Cr{_x}B{_{16}}Si{_{12}}) is investigated using nonlinear susceptibility. A simple molecular field treatment for the critical region shows that the third order suceptibility (chi{_3}) diverges on both sides o…
The Journal of Phycology was founded in 1965 by the Phycological Society of America. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, taxonomist, geneticist, and biochemist. The…
The Journal of Phycology was founded in 1965 by the Phycological Society of America. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, taxonomist, geneticist, and biochemist. The…
Unprocessed single-walled carbon nanotubes suspended in air at room temperature emit bright, sharply peaked band gap photoluminescence. This is in contrast with measurements taken from nanotubes lying on the flat surface for which no luminescence was detected. Each individual nanotube has a luminescence peak of simila…
Preface.Foreword. 1. Introduction.2. Surface Anchoring and Elasticity.3. Polarizing Microscopy.4. The Blue Phases.5. The Nematic and Cholesteric Phases.6. Twist Grain Boundary Phases.7. The Fluid Smectic Phases.8. The SmC Subphases.9. The Hexatic Phases.10. Soft Crystal Phases and Crystallization.11. Other Liquid Crys…
Abstract We study the breathing‐like phonon modes of double‐walled carbon nanotubes in a simple analytical model by considering the tube walls as coupled oscillators. The force constant of the oscillator coupling is found to be proportional to the inner tube diameter. Thus, only for small‐diameter tubes, the shift of…
Abstract Poly[4,4′‐bis(butylsulfanyl)‐2,2′‐bithiophene] modified conventional‐size and (ultra)microelectrodes are first investigated in acetonitrile and quasi‐neutral aqueous solution with respect to the repeatability of the responses obtained both in cyclic voltammetry and in differential pulse voltammetry. The react…
We demonstrate a molecular rectifying junction made from a sequential self-assembly on silicon. The device structure consists of only one conjugated (p) group and an alkyl spacer chain. We obtain rectification ratios up to 37 and threshold voltages for rectification between -0.3V and -0.9V. We show that rectification…
Using the stabilized jellium model in two schemes of `relaxed' and `rigid', we have calculated the dissociation energies and the fission barrier heights for the binary fragmentations of singly-ionized and doubly-ionized Ag clusters. In the calculations, we have assumed spherical geometries for the clusters. Comparison…
Light- and voltage-induced changes in the microwave reflectivity of semiconductors can be used to study the kinetics and mechanisms of electron transfer at semiconductor|electrolyte interfaces. The theory of the method is developed and illustrated by numerical calculations of the steady-state microwave response for lo…
The adsorption state and morphology of tetracyanoquinodimethane (TCNQ) deposited from acetonitrile solutions onto atomically smooth native oxide surfaces of Al(111) films were investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The analysis of the XP spectra of the deposited TCNQ…
Adhesive properties on glass of commercial zein and an inexpensive zein-lipid mixture isolated from dry-milled corn were investigated. A method was developed for uniformly preparing bonded glass panels and measuring the amount of pull required to separate the panels. The adhesive strength of commercial zein to glass w…
His26Tyr and His33Tyr mutants were obtained from the Cys102Thr variant of yeast iso-1-cytochrome c. Spectroscopic studies show that a mutation at position 26 at pH 7.0 enhances flexibility of the peptide, alters the heme pocket region and the axial coordination to heme-iron, and reduces protein stability. The His26Tyr…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTEffect of Gold Nanoparticles as a Support for the Oligomerization of l-Cysteine in an Aqueous SolutionKensuke Naka, Hideaki Itoh, Yoshihiro Tampo, and Yoshiki ChujoView Author Information Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Yoshida…
Viscosity and light-scattering measurements are performed on two dilute aqueous solutions of regenerated silk fibroin (RSF) of Bombyx mori silkworms obtained by dialysis against 6 M LiBr and pure water solutions at ambient temperature. The reduced viscosity of the RSF solutions in 6 M LiBr is found to decrease with de…
Absorption spectra of single-walled carbon nanotubes (SWNT) dispersed in dimethylformamide (DMF) have been recorded in the visible to near-infrared range. Besides broad absorption bands, the spectra show a sharp peak at 5187 cm -1, which has been attributed in the literature to the absorption of semiconducting nanotub…
Colloidal gold nanoparticles self-assembled into macroscopic aggregates by charge-transfer interaction between pyrenyl units as an electron donor immobilized on the surface of the gold nanoparticles and a bivalent linker containing two dinitrophenyl units as electron acceptors. Transmission electron microscopy and sca…
The ion-nuclear distance of Gd(III) to a coordinated water proton, r(Gd)(-)(H), is central to the understanding of the efficacy of gadolinium-based MRI contrast agents. The dipolar relaxation mechanism operative for contrast agents has a 1/r(6) dependence. Estimates in the literature for this distance span 0.8 A (2.5-…
Single-wall carbon nanotubes (SWNTs) were fluorinated with F 2 at 250 °C, and then some were heated under He to temperatures ranging from 100 to 400 °C to desorb the fluorine. The resulting samples were studied with X-ray photoelectron spectroscopy, Raman spectroscopy, IR spectroscopy, and electrical resistance measur…
Extended angle-resolved noble metal nanostructures such as nanooverlaps, nanocontacts, nanogaps, and nanochains show diverse optical characteristics. Polarized microextinction spectroscopy demonstrates dichroic contrast varying between 20 and 200 nm upon comparing the optical spectra of the transverse and longitudinal…