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Microbial synthesis of semiconductor CdS nanoparticles, their characterization, and their use in the fabrication of an ideal diode

MPG-Autoren
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Vogel,  Walter
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Urban,  Joachim
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Zitation

Kowshik, M., Deshmukh, N., Vogel, W., Urban, J., Kulkarni, S. K., & Paknikar, K. M. (2002). Microbial synthesis of semiconductor CdS nanoparticles, their characterization, and their use in the fabrication of an ideal diode. Biotechnology and Bioengineering, 78(5), 583-588. Retrieved from http://www3.interscience.wiley.com/cgi-bin/abstract/93514398/START.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-14B7-E
Zusammenfassung
Cadmium sulfide nanoparticles were synthesized intracellularly by a Schizosaccharomyces pombe strain when challenged with 1 mM cadmium in solution. The nanoparticles, a known semiconducting material, exhibited an absorbance maximum at 305 nm. X-ray scattering data showed that the nanoparticles had a Wurtzite (Cd16S20)-type hexagonal lattice structure and most of the nanoparicles were in the size range of 1-1.5 nm. The nanoparticles were used in the fabrication of a heterojunction with poly (p-phenylenevinylene). The diode exhibited similar to75 mA/cm(2) current at 10 V when forward biased and the breakdown occurred at similar to15 V in the reverse biased mode. These characteristics are considered ideal for a diode.