Document Type : Full Research Paper


1 M.Sc, Biomaterial Group, Faculty of Biomedical Engineering, Amirkabir University of Technology

2 Associate Professor, Biomaterial Group, Faculty of Biomedical Engineering, Amirkabir University of Technology

3 Assistant Prodessor, Department of Microbiology, Pasteur Institute of Iran

4 Professor, Biomaterial Group, Faculty of Biomedical Engineering, Amirkabir University of Technology

5 M.Sc Student, Biomaterial Group, Faculty of Biomedical Engineering, Amirkabir University of Technology



In recent years, nanoparticles have attracted considerable attention due to their special optical, chemical, and electrical properties. Developments of nanoparticles synthesis methods for producing materials with precise size and morphology have been considered recently. Among these methods, biosynthesis has a special position for its high compatibility with environment. The use of microorganism in nanotechnology is one of the important aspects of this issue. In this survey we have used Escherichia coli 35218 to Cadmium Sulfide nanoparticles synthesis. First, appropriate time of cadmium ions addition and their maximum concentrations were determined that they don􀂶t inhibit bacterial growth. Then we studied intra and extracellular biosynthesis. According to this survey, this strain wasn't able to produce cadmium sulfide nanoparticles intracellulary but also these nanoparticles were extracellulary synthesized in the medium supplemented with L-cysteine. Formation of CdS nanoparticles, their morphologies and fluorescence properties were determined with WDX, SEM and fluorescence microscopy.


Main Subjects

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