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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wadhwani, Sweety A. Shedbalkar, Utkarsha U. Singh, Richa Vashisth, Priya Pruthi, Vikas Chopade, Balu A. |
| Copyright Year | 2016 |
| Abstract | Cell biomass and metal salt concentration have great influence on morphology of biosynthesized nanoparticle. The aim of present study was to evaluate the effect of varying cell density and gold salt concentrations on synthesis of nanoparticles and its morphology, which has not been studied in bacteria till now. When cells of Acinetobacter sp. SW30 were incubated with different cell density and gold chloride concentrations, tremendous variation in color of colloidal solution containing gold nanoparticles (AuNP) was observed indicating variation in their size and shapes. Surprisingly, monodispersed spherical AuNP of size ~19 nm were observed at lowest cell density and HAuCl$_{4}$ salt concentration while increase in cell number resulted in formation of polyhedral AuNP (~39 nm). Significance of this study lays in the fact that the shape and dispersity of AuNP can be customized depending up on the requirement. FTIR spectrum revealed shift from 3221 to 3196 cm$^{−1}$ indicating the presence and role of amino acids in Au$^{3+}$ reduction while possible involvement of amide I and II groups in stabilization of AuNP. The rate constant was calculated for cell suspension of 2.1 × 10$^{9}$ cfu/ml challenged with 1.0 mM HAuCl$_{4}$, incubated at 30 °C and pH 7 using the slopes of initial part of the plot log (A$_{α}$ − A$_{t}$) versus time as 1.99 × 10$^{−8}$ M. Also, this is the first study to report the kinetics of gold nanoparticle synthesis by Acinetobacter sp. SW30. |
| Starting Page | 439 |
| Ending Page | 444 |
| Page Count | 6 |
| File Format | |
| ISSN | 00468991 |
| Journal | Indian Journal of Microbiology |
| Volume Number | 56 |
| Issue Number | 4 |
| e-ISSN | 09737715 |
| Language | English |
| Publisher | Springer India |
| Publisher Date | 2016-05-27 |
| Publisher Institution | Association of Microbiologists of India |
| Publisher Place | New Delhi |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Acinetobacter Cell density Gold chloride concentration Fourier transform infrared Kinetics Microbiology Medical Microbiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Microbiology |
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