A means for obtaining broadband photophoretic spectra is described. The sensitivity of the technique is found in accordance with radiometric theory to increase markedly with pressure reduction below 1 atm. Noise oscillation induced by radiometric torques is contained through the use of electronic damping. The first broadband spectrum on a single crystallite (approximtely 5 microm) of CdS is pre...

The synthesis of nano-sized particles of NU-1000 (length from 75 nm to 1200 nm) and PCN-222/MOF-545 (length from 350 nm to 900 nm) is reported. The catalytic hydrolysis of methyl paraoxon was investigated as a function of NU-1000 crystallite size and a significant enhancement in the rate was observed for the nano-sized crystals compared to microcrystals.

An iron titanate catalyst with a crystallite phase, prepared by a co-precipitation method, showed excellent activity, stability, selectivity and SO(2)/H(2)O durability in the selective catalytic reduction of NO with NH(3) in the medium temperature range.

Four samples of (Y1−xCex)3(Al1−yGay)5O12 (where x=0.01, 0.02 and y=0, 0.5) were synthesized via the simple, efficient combustion synthesis method in order to determine the effect of substituting Ga for Al on the temperature-dependent fluorescent lifetime. X-ray diffraction(XRD) data show that the average crystallite size is 20-30nm and that the gallium-doped samples have longer lattice constant...

When dark-grown plants are illuminated, the characteristic morphology of the etioplast changes. The tubules of the paracrystalline prolamellar body disperse as the membranes reorganize and 'grow out' as 'perforated' thylakoids. Similar changes are expected during the greening of the isolated etioplasts of Avena. Under certain preparative conditions the morphological changes vary from those prev...

YVO4:Eu nanocrystals synthesized by direct precipitation reaction. The morphologic transformation of the nanocrystals as the results of thermal treatments were analyzed using optical spectroscopy. A red shift of the fluorescence lines with the increase of the crystallite size was observed. The kinetics of the D0 level of Eu3+ is also analyzed.

The crystal structure and magnetic properties of Fe/AI multilayered films prepared using the ion beam sputtering method have been investigated. The crystallite orientation and magnetism of Fe layers were found to depend significantly on A1 layer thickness. This resutt may be caused by the crystallographic interaction between Fe and A1 layers.

Fully aromatic polyimides are synthesized via solid-state polymerization of the corresponding monomer salts. The crystal structure of salts shows strong hydrogen bonding of the reactive groups and thereby paves the way for solid-state transformations. The polycondensation yields copies of the initial salt crystallite habits, accompanied by the development of a porosity especially suited for CO2.