Materials Literature
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Most therapeutic drugs distribute to the whole body, which results in general toxicity and poor acceptance of the treatments by patients. The targeted delivery of chemotherapeutics to defined cells, either stromal or cancer cells in cancer lesions, or defined inflammatory cells in immunological disorders, is one of th…
The potential energy surface for activation of methane by the third-row transition metal cation, Au+, is studied experimentally by examining the kinetic energy dependence of this reaction using guided ion beam tandem mass spectrometry. A flow tube ion source produces Au+ primarily in its 1S0 (5d10) electronic ground s…
The pore variations of ordered cage-type mesoporous silica FDU-12s have been analyzed in detail by PXRD, SAXS, nitrogen sorption, and electron crystallography. FDU-12s with a cubic symmetry (space group, Fmm) were templated by amphiphilic triblock copolymer F127 with the addition of 1,3,5-trimethylbenzene and KCl unde…
The nanomechanical response properties of $3\mathrm{C}\text{\ensuremath{-}}\mathrm{SiC}$ nanowires are investigated using molecular dynamics simulation with Tersoff bond-order interatomic potential. Under axial compression and tensile strain, the computed Young's modulus and structural changes at elastic limit do not…
A superelasticity (shape memory) behavior has been discovered for the superlattice-structured ZnO nanohelices. By in situ manipulation using a nanoprobe, the nanohelix could elastically recover its shape after an extremely large axial stretching to a degree close to the theoretical limit, while suffering little residu…
Abstract Raman spectroscopy is a common tool for the qualitative and quantitative chemical analysis of molecules. Although the unique identification of molecules is possible via their vibrational lines, high concentrations (mmol/l) are needed for their nonresonant excitation owing to their low scattering cross section…
An extensive low temperature magnetisation study of high quality single crystals of the Kagome staircase compounds Ni3V2O8 and Co3V2O8 has been performed, and the H-T phase diagrams have been determined from these measurements. The magnetisation and susceptibility curves for Co3V2O8 are analysed in terms of their comp…
Four different sizes of citrate-protected silver nanoplates with the corresponding in-plane dipole resonance band at 530, 619, 778, and 858 nm, respectively, are synthesized for surface-enhanced Raman scattering (SERS) study. Their aggregation behaviors are monitored by use of UV-vis spectroscopy. During the aggregati…
During our effort to synthesize the tetrahedral Au20 cluster, we found a facile synthetic route to prepare monodisperse suspensions of ultrasmall Au clusters AuN (N < 12) using diphosphine ligands. In our monophasic and single-pot synthesis, a Au precursor ClAu(I)PPh3 (Ph = phenyl) and a bidentate phosphine ligand P(P…
$\mathrm{Sr}\mathrm{Mn}{\mathrm{O}}_{3}$ is a rare example of a compound having both a cubic (high-temperature) and a hexagonal (low-temperature) perovskite polymorph. While the former is built from corner-sharing $\mathrm{Mn}{\mathrm{O}}_{6}$ octahedra only, the latter contains corner-sharing confacial bioctahedral $…
The jarosite family of minerals contain antiferromagnetically coupled Fe3+ ions that make up the kagome network. This geometric arrangement of the Fe3+ ions causes magnetic frustration that results in exotic electronic ground states, e.g. spin glasses and spin liquids. Synthesic research into jarosites has focused on…
The low temperature properties of the Kagome-type system Co3V2O8 have been studied by powder neutron diffraction both in zero field and in applied magnetic field of up to 8 T. Below 6 K, the zero-field ground state is ferromagnetic with the magnetic moments aligned along the a-axis. The size of the moment on one of th…
Mulheran and Blackman have provided a simple and clear explanation of the scale invariance of the island size distribution at the early stage of film growth [Phil. Mag. Lett. 72, 55 (1995)]. Their theory is centered on the concept of capture zone properly identified by Voronoi cell. Here we substantiate experimentally…
Results of the experimental study of ordering lanthanum hydrides of LaHX system are presented. It is shown that obtained results can be interpreted as an indirect confirmation of the existence of order-order transformations in LaH2+c hydrides.
We investigate the possible binding configurations of pairs of C60 molecules when pushed against each other. Tersoff potential, which represents intramolecular interactions well, has been used to calculate potential energies. We begin relaxation of atomic coordinates at various distances of separation and for all poss…
Identical regions of partially reduced TiO2(110) surfaces with bridge-bonded oxygen vacancy (BBO(V)) concentrations of approximately 10% ML (1 ML = 5.2 x 10(14) cm(-2)) were imaged using scanning tunneling microscopy (STM) before and after dosing H2O at ambient temperature (approximately 300 K). Atomically resolved im…
Polymer ageing may involve physical ageing without chemical reaction occurring; chemical changes such as crosslinking during curing of a thermoset; thermal conditioning at elevated temperature; photochemical ageing , as occurs in weathering. This review concentrates on examples involving a combination of two or more o…
Photoelectron spectroscopy, optical characterization, and density functional calculations of ${\mathrm{ZnO}}_{1\ensuremath{-}x}{\mathrm{S}}_{x}$ reveal that the valence-band (VB) offset ${E}_{v}(x)$ increases strongly for small S content, whereas the conduction-band edge ${E}_{c}(x)$ increases only weakly. This is exp…
Modern nanotechnology opens the possibility of combining nanocrystals of various materials with very different characteristics in one superstructure. Here we study theoretically the optical properties of hybrid molecules composed of semiconductor and metal nanoparticles. Excitons and plasmons in such a hybrid molecule…
Silk fibroin sol-gel transitions were studied by monitoring the process under various physicochemical conditions with optical spectroscopy at 550 nm. The secondary structural change of the fibroin from a disordered state in solution to a beta-sheet-rich conformation in the gel state was assessed by FTIR and CD over a…