Phthalocyanization of cadmium sulfide and zinc oxide. Effects on the photochemistry in aqueous dispersion

Zinc oxide nanoparticles (ZnO-NPs) are widely utilized in many applications due to distinct physical and chemical characteristics. There are growing concerns that abundant use of ZnO-NPs can cause harm to humans and the environment. There is a substantial problem with reproducibility in nanotoxicology research due to the inherent properties of nanoparticles. Dispersion media are used for the preparation of nanoparticles. However, the physical and biological behaviors of ZnO-NPs in aqueous dispersion media are poorly understood. In this study, we investigated the effect of ZnO-NPs on the viability of SH-SY5Y cells. Our results showed that ZnO-NPs diluted from water-dispersed stock solution caused significant cell death at a much lower dose compared to their counterpart diluted from the phosphate-buffered saline (PBS)-dispersed stock solution. Electron microscopic data indicated that ZnO-NPs from the PBS-dispersed stock solution form much larger agglomerates compared to the one from the water-dispersed stock solution. From these data, we can conclude that the types of media used for particle dispersion impact the change in the physical property and cytotoxicity of ZnO-NPs.

Download Full-text

Improved performance of poly(3-hexylthiophene)/zinc oxide hybrid photovoltaics modified with interfacial nanocrystalline cadmium sulfide

Applied Physics Letters ◽

10.1063/1.3232231 ◽

2009 ◽

Vol 95 (21) ◽

pp. 213506 ◽

Cited By ~ 64

Author(s):

Erik D. Spoerke ◽

Matthew T. Lloyd ◽

Erica M. McCready ◽

Dana C. Olson ◽

Yun-Ju Lee ◽

...

Keyword(s):

Zinc Oxide ◽

Cadmium Sulfide ◽

Improved Performance ◽

Hybrid Photovoltaics

Download Full-text

Microwave-Assisted Synthesis of Cadmium Sulfide Nanoparticles: Effect of Hydroxide Ion Concentration

MRS Proceedings ◽

10.1557/opl.2013.1178 ◽

2013 ◽

Vol 1617 ◽

pp. 151-156 ◽

Cited By ~ 1

Author(s):

Israel López ◽

Idalia Gómez

Keyword(s):

Cadmium Sulfide ◽

Aqueous Dispersion ◽

Threshold Concentration ◽

Ion Concentration ◽

Microwave Assisted Synthesis ◽

Cubic Phase ◽

Hydroxide Ion ◽

Microwave Assisted ◽

Cadmium Sulfide Nanoparticles ◽

Vis Spectroscopy

ABSTRACTCadmium sulfide nanoparticles were synthesized by a microwave-assisted route in aqueous dispersion. The cadmium sulfide nanoparticles showed an average diameter around 5 nm and a cubic phase corresponding to hawleyite. The aqueous dispersions of the nanoparticles were characterized by UV-Vis spectroscopy, luminescence analysis, transmission electron microscopy and X-ray diffraction. The addition of sodium hydroxide solutions at different concentrations causes a red-shift in the wavelength of the first excitonic absorption peak of the cadmium sulfide nanoparticles, indicating a reduction of the band gap energy. Besides, the intensity of the luminescence of the nanoparticle dispersions was increased. However, there is a threshold concentration of the hydroxide ion above which the precipitation of the cadmium sulfide nanoparticles occurs.

Download Full-text