Materials Literature
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Katherine A. Kantardjieff, Mortaza Jamshidian, Bernhard Rupp; Distributions of pI versus pH provide prior information for the design of crystallization screenin
Ferrimagnetic resonance (FMR) measurements in thin films of $\mathrm{V}{[\mathrm{TCNE}]}_{x}$ grown by chemical vapor deposition exhibit a series of sharp lines at $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The orientational dependence of these lines is a result of the sample geometry provided the magnetization track…
Subpicosecond pump−probe transient absorption spectroscopy has been used to examine the probe wavelength-dependent kinetics of PVP capped CdS/HgS/CdS quantum dot quantum well nanoparticles. Using 398- and 520-nm excitations, the relaxation of the excited hot electrons above the band gap state is characterized by both…
The field-induced alignment of a smectic-A phase is, in principle, a complicated process involving the director rotation via the interaction with the field and the layer rotation via the molecular interactions. Time-resolved nuclear magnetic resonance spectroscopy has revealed this complexity in the case of the direct…
A uniform, monolayer-thick array of Au nanoparticles are produced on an aminopropylthrimethoxysilane-modified glass substrate by simple immersion of the substrate in the sol for 1 h (see AFM image, Figure). Longer immersion causes the nanoparticles to form colloidal domain structures, which induce a second-order polar…
The probability distribution of the internal shear stress generated by systems of straight, parallel edge dislocations is studied. The stress distribution functions of randomly distributed dipoles and walls are calculated analytically. The stress distribution function of relaxed systems is also calculated analytically…
The (111) surface of rutile TiO 2 was prepared with argon ion sputtering and vacuum annealing at 970 K. Scanning tunneling microscope observation revealed nanometer-scale domains of (1 × 1) and (1 × 2) phases on the surface. Formic acid was dissociatively adsorbed on the surface at room temperature. The recombination…
Using large scale molecular dynamics, we study the contact line motion of a liquid meniscus crossed by a moving nanofiber. Varying the amplitude of the liquid/solid interactions, we analyze the shape of the meniscus versus time for a range of velocities. The associated contact angles are estimated by fitting the profi…
Carbon nanotubes have extraordinary mechanical and electronic properties and hold great promise for future applications. The most important aspects of this structure are its low density, high aspect ratio, one dimensionality, high mechanical strength and high electrical and thermal conductivity. We present a short, st…
A novel microarray system that utilizes a porous aluminum-oxide substrate and flow-through incubation has been developed for rapid molecular biological testing. To assess its utility in gene expression analysis, we determined hybridization kinetics, variability, sensitivity and dynamic range of the system using amplif…
A set of samples co-doped with Er and Ag were prepared with a combined sol-gel and ion-exchange route. This multistep process sytnthesizes samples in which the silver atoms are dispersed in the matrix and/or aggregated in Ag multimers or nanoclusters. The samples exhibit a different photo-luminescence response dependi…
We report the isosteric heats of adsorption, q st, for butane on multiwalled carbon nanotubes (MWNTs) over a range of surface loadings at temperatures below the normal boiling point. Butane is a nonspherical, nonpolar molecule that may exhibit different orientations in multilayer adsorption. The morphology of our MWNT…
Thermoelectric modules should be selected or designed to meet the specific cooling/heating requirements of a particular application and in most cases, the cooling/heating capacity and the working temperatures (hot and cold side temperature of thermoelectric devices) are known. Computer modelling can be used to assist…
Flavodoxins are well known one-domain alpha/beta electron-transfer proteins that, according to the presence or absence of a approximately 20-residue loop splitting the fifth beta-strand of the central beta-sheet, have been classified in two groups: long and short-chain flavodoxins, respectively. Although the flavodoxi…
This paper presents the study of a hot strip made of thin rectangular electrical resistance with a thermocouple placed on its centre. The purpose was to simultaneously estimate thermal effusivity and conductivity in a limited time ( t 2 < 180 s) using a low cost probe. Heat transfer has been modelled with the quadrupo…
The flocculation of colloidal nanosheets of MnO2 with Al13 Keggin ions produces a novel pillared structure with a double-layer arrangement of Al13 species, which exhibits a large intersheet spacing of 2.3 nm and a well-defined mesoporosity. The Figure shows a schematic representation of the formation process.
The coalescence stability of poly(dimethylsiloxane) emulsion droplets in the presence of silica nanoparticles ( approximately 50 nm) of varying contact angles has been investigated. Nanoparticle adsorption isotherms were determined by depletion from solution. The coalescence kinetics (determined under coagulation cond…
Flavodoxins are classified in two groups according to the presence or absence of a approximately 20-residue loop of unknown function. In the accompanying paper (36), we have shown that the differentiating loop from the long-chain Anabaena PCC 7119 flavodoxin is a peripheral structural element that can be removed witho…
The 2 K field-dependent magnetization, M ( H ), of S = 3 / 2 [Ru II/III 2 (OAc) 4 ] + was studied. [Ru II/III 2 (OAc) 4 ] + exhibits an unusually low magnetization with respect to that predicted by the classical Brillouin function. This reduced value is a consequence of the large anisotropy arising from the large zero…
Ultrahigh pore density nanoporous films with cylindrical pores that are perpendicular to the substrate and parallel to each other have been fabricated, and the Al nanocylinders successfully removed (see Figure). The template-assisted growth of ultrahigh density Ni nanowire arrays have also been achieved by direct-curr…