In(2)S(3)/ZnIn(2)S(4) bulk composite was successfully synthesized through an ion-exchange route using NaInS(2) as a precursor. Compared with the constituent pure component (In(2)S(3) or ZnIn(2)S(4)), the photocatalytic H(2) evolution of the composite was greatly enhanced because of the efficient separation and migration of photoexcited carriers (electrons and holes) at the interface of the bulk...

We investigate the ability of a focused helium ion beam to selectively modify and mill materials. The sub nanometer probe size of the helium ion microscope used provides lateral control not previously available for helium ion irradiation experiments. At high incidence angles the helium ions were found to remove surface material from a silicon lamella leaving the subsurface structure intact for ...

Although ion beam technology has frequently been used for introducing defects in graphene, the associated key mechanism of the defect formation under ion irradiation is still largely unclear. We report a systematic study of the ion irradiation experiments on SiO2-supported graphene, and quantitatively compare the experimental results with molecular dynamic simulations. We find that the substrat...

Positive and negative hydrogen ions are produced by plasma-assisted catalytic ionization using a porous nickel plate, where the irradiation current density and energy of positive ions produced by discharge to the porous plate are controlled. The ion energy distributions are analyzed from the properties of current densities of positive and negative ions extracted from the porous surface. Positiv...

Time-resolved magneto-optical Kerr spectroscopy of ferromagnetic InMnAs reveals two distinct demagnetization processes--fast (<1 ps) and slow (approximately 100 ps). Both components diminish with increasing temperature and are absent above the Curie temperature. The fast component rapidly grows with pump power and saturates at high fluences (>10 mJ/cm(2)); the saturation value indicates a compl...

Motivated by the use of chitosan (Ch), and cellulose acetate (AC) as organic matrices in several therapeutic drugs, a theoretical study has been elaborated through density functional theory method (DFT) to investigate interaction mechanism between two essential ions for human body Ca2+, K+ (AC). Many physical chemical aspects have carried out after achievement structural optimization. This invo...

In the current study cerium or galliumcontaining silicate based 13-93 bioactive glass powders were prepared using sol-gel method. Cerium and gallium ions were chosen due to their well-known therapeutic actions and antimicrobial properties. Effect of cerium and gallium substitution (up to 5w%) on the in vitro bioactivity, and mechanical properties of the prepared powders and scaffolds were asses...

the complexation reactions between cu2+, pd2+ and ni2+ metal ions with promethazine (pm) in water or dmf were studied by the spectrophotometric methods at [(15, 25,35 and 45±0.1) °c]. the complexation process was optimized in terms of ph, temperature and contact time. the stoichiometry of the complex was found to be 1:1 (metal ion/ligand). the formation constants of the resulting complexes were...

Bioelectronic Ion Pumps An example of an ion pump for delivering therapeutic ions and biomolecules is demonstrated in article 2201996, by Marco Rolandi co-workers. exchange membrane (IEM) connects two reservoirs with different solutions. The top working electrode (WE) interfaces the source solution, while bottom reference/counter (RE/CE) target solution. A voltage across electrodes enables elec...