Materials Literature
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The MgSO 4 crystal hydrate formed below approximately 0 °C was proven to be the undecahydrate, MgSO 4 ·11H 2 O (meridianiite) instead of the reported dodecahydrate MgSO 4 ·12H 2 O. The crystals were grown from solution by eutectic freeze and by cooling crystallization. The crystal structure analysis and the molecular…
Nearly monodispersed indium oxide (In 2 O 3 ) nanocrystals with tunable sizes of <10 nm were prepared by a one-pot solvothermal route using indium oleate as the precursor. The nanocrystals were characterized by transmission electron microscopy (TEM), high-resolution TEM, X-ray diffraction, X-ray photoelectron spectros…
The multiresponse molecule salicylidene Schiff base, N -3,5-dichlorosalicylidene-( S )-α-phenylethylamine (SPEA), was fully encapsulated into the channel of the amino-functionalized mesoporous molecular sieve SBA-15 via the hydrogen bond assembly. This organic/inorganic hybrid material was well-characterized by X-ray…
A first example of the fabrication of large-scale diffractive microlens arrays on n-GaAs using an efficient electrochemical technique named CELT (confined etchant layer technique) is reported. This microlens array is an eight-phase level diffractive optic device with eight concentric rings and seven steps in one lensl…
Abstract One of the great challenges in photonics has been to modify silicon to enhance light emission properties. In this review article we survey recent studies which have generated light from silicon in a variety of ways including introduction of emissive centers, anodization, fabrication of quantum‐confined struct…
Electron spins of molecular magnets are promising candidates for large scale quantum information processing because they exhibit a large number of low-lying excited states. In this paper X-band pulse electron paramagnetic resonance spectroscopy is used to determine the intrinsic relaxation times T1 and T2 of a molecul…
We report an ultrasonic investigation of the elastic moduli on a single crystal of hexagonal $\mathrm{Y}\mathrm{Mn}{\mathrm{O}}_{3}$ as a function of temperature. Stiffening anomalies in the antiferromagnetic N\'eel state below ${T}_{N}=72.4\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ are observed on all the four elastic mo…
A single-crystalline EuF 3 nanoflower with a novel three-dimensional (3D) nanostructure has been successfully synthesized via a facile, fast, efficient, and mild ultrasonic irradiation solution route employing the reaction of Eu(NO 3 ) 3 and KBF 4 under ambient conditions without any template or surfactant. The ultras…
The dispersion of SWCNTs by using a novel diazapentacene derivative is reported. The proposed pi-pi interactions between the diazapentacene derivative and SWCNTs leave their inherent properties virtually intact, as observed by several photophysical measurements. This approach is very attractive for manipulation of SWC…
We present experimental evidence of a transition in the short-time Brownian motion of colloids from diffusive to subdiffusive, Rouse-like. This transition is seen for particles that are bound, through physical adsorption, to transient polymer networks. The characteristic Rouse scaling of the mean square particle displ…
The use of a new precursor, mer-[Fe(mpzcq)(CN)3]- (1), produced a dimeric molecule, [Fe(mpzcq)(CN)3][Mn(salen)(H2O)] x H2O (2), and a one-dimensional zigzag chain, [Fe(mpzcq)(CN)3][Mn(salcy)] x MeOH x MeCN (3). Antiferromagnetic couplings are operating between magnetic centers through CN ligands, and a field-induced m…
Degradation experiments and model studies suggested that the longer lived green fluorescence from an aggregated poly(p-phenylene ethynylene) (PPE) was due to the presence of highly emissive, low-energy, anthryl defect sites rather than the emissive conjugated polymer excimers proposed in a previous report. After eluci…
Defects present in ZnO nanocrystals prepared by a wet chemical method have been characterized by photoluminescence (PL) and positron annihilation spectroscopy (PAS) techniques. The as-prepared sample was heat treated at different temperatures to obtain nanocrystals in the size range of 19–39nm. X ray diffractograms co…
Radial and longitudinal nanosized In 2 O 3 −SnO 2 heterostructures were produced by applying a suitable methodology of transport and condensation. Sequential evaporation−condensation over In-seeded alumina promotes the formation of a radial heterostructure, driven by the direct vapor−solid growth mechanism. The single…
Heterografted molecular bottle brushes, i.e., poly(glycidol- graft -ε-caprolactone-acetyl)- co -(glycidol- g raft -methyl methacrylate) [P(G- graft -CL AC )- co -(G- graft -MMA)] and poly(glycidol- graft -ε-caprolactone-acetyl)- co -(glycidol- g raft - n -butyl methacrylate) [P(G- graft -CL AC )- co -(G- graft -BMA)]…
Self-organized rows of CeO2 nanodots (see image) have been achieved through centering of islands within the terraces of vicinal perovskite substrates. The extraordinary effectiveness for lateral confinement, with islands' heights ∼ 20 times larger than the lattice steps, results from the non-coherent vertical interfac…
Violet-blue photoluminescence of Zn/ZnO core/shell nanoparticles, induced by laser ablation in liquid, was observed. The emission band shows an abnormal red first and then blueshift with temperature increasing from 8 to 300 K and abnormal narrowing at the temperature range from 30 to 130 K. Such temperature-dependent…
Nickel diselenide nanocrystals in well-defined star shape have been successfully synthesized via an improved solvothermal route with oleic acid as a capping ligand. The obtained products were characterized by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron mi…
Analysis of surface enhanced Raman scattering spectra from 20 different molecules adsorbed on substrates composed of silver nanoparticles immobilized on silver mirror films revealed competitive Raman enhancement from different types of molecules simultaneously present on the surface. The observed SERS behavior could n…
The glass transition behavior of glycerol and propylene glycol confined in nanoporous glass is investigated using differential scanning calorimetry. Both silanized and unsilanized porous glasses are used to confine the liquids with nominal pore sizes ranging from 2.5 to 7.5 nm, and the glass transition temperature (T(…