TY - JOUR
T1 - Extracellular biosynthesis of silver nanoparticles using the fungus Fusarium oxysporum
AU - Ahmad, Absar
AU - Mukherjee, Priyabrata
AU - Senapati, Satyajyoti
AU - Mandal, Deendayal
AU - Khan, M. Islam
AU - Kumar, Rajiv
AU - Sastry, Murali
N1 - Funding Information:
The authors thank Ms. Renu Pasricha, Materials Chemistry Division, NCL, Pune, for assistance with the TEM measurements. SS and DM thank the Council of Scientific and Industrial Research (CSIR), Government of India, for financial support.
PY - 2003/5/1
Y1 - 2003/5/1
N2 - The development of reliable, eco-friendly processes for the synthesis of nanomaterials is an important aspect of nanotechnology today. One approach that shows immense potential is based on the biosynthesis of nanoparticles using biological micro-organisms such as bacteria. In this laboratory, we have concentrated on the use of fungi in the intracellular production of metal nanoparticles. As part of our investigation, we have observed that aqueous silver ions when exposed to the fungus Fusarium oxysporum are reduced in solution, thereby leading to the formation of an extremely stable silver hydrosol. The silver nanoparticles are in the range of 5-15 nm in dimensions and are stabilized in solution by proteins secreted by the fungus. It is believed that the reduction of the metal ions occurs by an enzymatic process, thus creating the possibility of developing a rational, fungal-based method for the synthesis of nanomaterials over a range of chemical compositions, which is currently not possible by other microbe-based methods.
AB - The development of reliable, eco-friendly processes for the synthesis of nanomaterials is an important aspect of nanotechnology today. One approach that shows immense potential is based on the biosynthesis of nanoparticles using biological micro-organisms such as bacteria. In this laboratory, we have concentrated on the use of fungi in the intracellular production of metal nanoparticles. As part of our investigation, we have observed that aqueous silver ions when exposed to the fungus Fusarium oxysporum are reduced in solution, thereby leading to the formation of an extremely stable silver hydrosol. The silver nanoparticles are in the range of 5-15 nm in dimensions and are stabilized in solution by proteins secreted by the fungus. It is believed that the reduction of the metal ions occurs by an enzymatic process, thus creating the possibility of developing a rational, fungal-based method for the synthesis of nanomaterials over a range of chemical compositions, which is currently not possible by other microbe-based methods.
KW - Biosynthesis
KW - Enzymes
KW - Fungi
KW - Hydrosols
KW - Nanoparticles
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U2 - 10.1016/S0927-7765(02)00174-1
DO - 10.1016/S0927-7765(02)00174-1
M3 - Article
AN - SCOPUS:0037401125
SN - 0927-7765
VL - 28
SP - 313
EP - 318
JO - Colloids and Surfaces B: Biointerfaces
JF - Colloids and Surfaces B: Biointerfaces
IS - 4
ER -