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Biomineralization of gold by Mucor plumbeus : The progress in understanding the mechanism of nanoparticles’ formation
Author(s) -
Maliszewska Irena,
Tylus Włodzimierz,
Chęcmanowski Jacek,
Szczygieł Bogdan,
PawlaczykGraja Izabela,
Pusz Wojciech,
BaturoCieśniewska Anna
Publication year - 2017
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1002/btpr.2531
Subject(s) - colloidal gold , chemistry , biomineralization , nanoparticle , biosorption , mycelium , nanotechnology , cell wall , transmission electron microscopy , nuclear chemistry , biophysics , chemical engineering , adsorption , materials science , organic chemistry , biochemistry , biology , sorption , botany , engineering
This contribution describes the deposition of gold nanoparticles by microbial reduction of Au(III) ions using the mycelium of Mucor plumbeus. Biosorption as the major mechanism of Au(III) ions binding by the fungal cells and the reduction of them to the form of Au(0) on/in the cell wall, followed by the transportation of the synthesized gold nanoparticles to the cytoplasm, is postulated. The probable mechanism behind the reduction of Au(III) ions is discussed, leading to the conclusion that this process is nonenzymatic one. Chitosan of the fungal cell wall is most likely to be the major molecule involved in biomineralization of gold by the mycelium of M. plumbeus. Separation of gold nanoparticles from the cells has been carried out by the ultrasonic disintegration and the obtained nanostructures were characterized by UV‐vis spectroscopy and transmission electron micrograph analysis. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1381–1392, 2017