Health & Environmental Research Online (HERO)


Print Feedback Export to File
620441 
Journal Article 
Photoinduced synthesis of CdTe nanoparticles using Te-modified gold electrode in poly(vinyl pyrrolidone)-containing electrolyte 
Sunyoung, H; Ki-Jung, P; Jinhyuck, P; Noseung, M; Si-Kwan, K; Rajeshwar, K 
2008 
38 
2 
203-206 
Photocathodic stripping of a pre-deposited tellurium film on a gold electrode in 0.1 M Na2SO4 electrolyte containing Cd2+ ions and poly(vinyl pyrrolidone) (PVP) was used as a route to the photoelectrosynthesis of CdTe nanoparticles. Thus illumination of a Te-modified gold surface generated Te2− species, which were removed from the surface into the bulk electrolyte containing Cd2+and PVP by vigorous stirring. The reaction of Te2−and Cd2+ produced PVP-protected nanosized CdTe particles dispersed in solution in the size range 20–40 nm. In this approach, PVP played a critical role as a stabilizer to form discrete CdTe particles instead of larger (agglomerated) ones. Electrochemical quartz crystal microgravimetry was used to monitor stripping of Te films during the light illumination and the synthesized CdTe nanoparticles were characterized by scanning electron microscopy, energy dispersive X-ray analyses and laser Raman spectroscopy. [ABSTRACT FROM AUTHOR] Copyright of Journal of Applied Electrochemistry is the property of Springer Science & Business Media B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts) 
SOLID state batteries; ELECTRIC batteries; POLYELECTROLYTES; ELECTROCHEMICAL analysis; EPOXY compounds; ETHYLENE oxide; ELECTRON distribution; CHEMISTRY, Physical & theoretical; PHOTOSYNTHETIC oxygen evolution; Photocorrosion; Photoelectrochemistry; Photoelectrosynthesis; Semiconductor nanoparticles