Enzyme mediated extracellular synthesis of CdS nanoparticles by the fungus, Fusarium oxysporum.
The biosynthesis of Q-state CdS nanoparticles by reaction of aqueous CdSO4 solution with the fungus, Fusarium oxysporum, is demonstrated. Nanoparticle formation proceeds by release of sulfate reductase enzymes by the fungus, conversion of sulfate ions to sulfide ions that subsequently react with aqueous Cd2+ ions to yield highly stable CdS nanoparticles. Elucidation of an enzymatic pathway using fungi opens up the exciting possibility of developing a rational, biosynthesis strategy for nanomaterials over a range of chemical compositions which is currently not possible.
Ahmad
Absar
A
Biochemical Sciences, Catalysis, and Materials Chemistry Divisions, National Chemical Laboratory, Pune - 411 008, India.
Mukherjee
Priyabrata
P
Mandal
Deendayal
D
Senapati
Satyajyoti
S
Khan
M Islam
MI
Kumar
Rajiv
R
Sastry
Murali
M
D002104:Cadmium / Q000378:metabolism; D019187:Cadmium Compounds / Q000138:chemical synthesis / Q000378:metabolism*; D005670:Fusarium / Q000201:enzymology*; D008854:Microscopy, Electron; D010316:Particle Size; D013056:Spectrophotometry, Ultraviolet; D013431:Sulfates / Q000378:metabolism; D013440:Sulfides / Q000138:chemical synthesis / Q000378:metabolism*
D019187:Cadmium Compounds; D013431:Sulfates; D013440:Sulfides; D002104:Cadmium; C034939:cadmium sulfide