Formation Process of Eosin Y-Adsorbing ZnO Particles by Electroless Deposition and Their Photoelectric Conversion Properties

Abstract

The thin films consisting of crystalline ZnO particles were prepared on fluorine-doped tin oxide electrodes by electroless deposition. The particles were deposited from an aqueous solution containing zinc nitrate, dimethyamine−borane, and eosin Y at 328 K. As the Pd particles were adsorbed on the substrate, not only the eosin Y monomer but also the dimer and debrominated species were rapidly adsorbed on the spherical ZnO particles, which were aggregated and formed secondary particles. On the other hand, in the absence of the Pd particles, the monomer was adsorbed on the flake-shaped ZnO particles, which vertically grew on the substrate surface and had a high crystallinity. The photoelectric conversion efficiency was higher for the ZnO electrodes containing a higher amount of the monomer during light irradiation.

Electroless Deposits of ZnO and Hybrid ZnO/Ag Nanoparticles on Mg-Ca0.3 Alloy Surface: Multiscale Characterization

“…The Mg-Ca0.3 samples (0.78 cm 2 ) were sanded with 600 to 4000 grit SiC paper with ethanol as a lubricant, then sonicated for 5 min and dried at room temperature. Electroless deposits of ZnO and ZnO/Ag on Mg-Ca0.3 surface (0.78 cm 2 ) were achieved by immersion in 10 −3 M aqueous suspensions of ZnO and solutions of Zn(NO 3 ) 2 (for 5 min) and AgNO 3 (for 3 min) at 21 • C [51][52][53][54][55]. Consequently, the previously ZnO coated samples were immersed in 10 −3 M AgNO 3 solution [56][57][58][59][60][61][62][63][64][65][66][67][68] for 3 min (Table 2).…”