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Studies in the Area of Photoelectrochemicals Reported from Jiangnan University

June 18, 2014

By a News Reporter-Staff News Editor at Biotech Week -- Fresh data on Biotechnology are presented in a new report. According to news reporting out of Wuxi, People's Republic of China, by NewsRx editors, research stated, "The discovery and development of photoelectrochemical sensors with novel principles are of great significance to realize sensitive and low-cost detection. In this paper, a new photoelectrochemial sensor based on the in situ formation of p-n junction was designed and used for the accurate determination of mercury(II) ions."

Our news journalists obtained a quote from the research from Jiangnan University, "Cysteine-capped ZnS quantum dots (QDs) was assembled on the surface of indium tin oxide (ITO) electrode based on the electrostatic interaction between Poly(diallyldimethylammonium chloride) (PDDA) and Cys-capped ZnS QDs. The in situ formation of HgS, a p-type semiconductor, on the surface of ZnS facilitated the charge carrier transport and promoted electron-hole separation, triggered an obviously enhanced anodic photocurrent of Cys-capped ZnS QDs. The formation of p-n junction was confirmed by P-N conductive type discriminator measurements and current-voltage (I-V) curves."

According to the news editors, the research concluded: "The photoelectrochemical method was used for the sensing of trace mercuric (II) ions with a linear concentration of 0.01 to 10.0 mu M and a detection limit of 4.6 Chi 10 (9) mol/ L. It is expected that the present study can serve as a foundation to the application of p-n heterojunction to photoelectrochemical sensors and it might be easily extended to more exciting sensing systems by photoelectrochemistry."

For more information on this research see: In situ formation of p-n junction: A novel principle for photoelectrochemical sensor and its application for mercury(II) ion detection. Analytica Chimica Acta, 2014;827():34-39. Analytica Chimica Acta can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Analytica Chimica Acta -

Our news journalists report that additional information may be obtained by contacting G.L. Wang, Jiangnan Univ, Sch Chem & Mat Engn, Minist Educ, Key Lab Food Colloids & Biotechnol, Wuxi 214122, People's Republic of China. Additional authors for this research include K.L. Liu, Y.M. Dong, Z.J. Li and C. Zhang (see also Biotechnology).

Keywords for this news article include: Wuxi, Asia, Biotechnology, Photoelectrochemical, People's Republic of China

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Source: Biotech Week

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