Microbial synthesis of semiconductor CdS nanoparticles, their characterization, and their use in the fabrication of an ideal diode.
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 (Cd(16)S(20))-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 approximately 75 mA/cm(2) current at 10 V when forward biased and the breakdown occurred at approximately 15 V in the reverse biased mode. These characteristics are considered ideal for a diode.
Kowshik
Meenal
M
Division of Microbial Sciences, Agharkar Research Institute, G.G. Agarkar Road, Pune 411 004, India.
Deshmukh
Neelima
N
Vogel
W
W
Urban
J
J
Kulkarni
S K
SK
Paknikar
K M
KM
D019187:Cadmium Compounds / Q000302:isolation & purification / Q000378:metabolism*; D004867:Equipment Design; D008029:Lighting / Q000295:instrumentation; D036103:Nanotechnology / Q000379:methods*; D011145:Polyvinyls / Q000737:chemistry / Q000378:metabolism*; D012568:Schizosaccharomyces / Q000378:metabolism*; D012666:Semiconductors; D013440:Sulfides / Q000302:isolation & purification / Q000378:metabolism*
D019187:Cadmium Compounds; D011145:Polyvinyls; D013440:Sulfides; C470024:poly(4-phenylenevinylene)