Facile biosynthesis of phosphate capped gold nanoparticles by a bacterial isolate Stenotrophomonas maltophilia

Journal Article · Mon Jun 08 00:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3141519· OSTI ID:21308696

Nangia, Yogesh; Wangoo, Nishima; Raman Suri, C ^[1]; Sharma, Saurabh; Wu, J -S; Dravid, Vinayak; Shekhawat, G S ^[2]

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1. Institute of Microbial Technology (CSIR), Sector 39-A, Chandigarh 160036 (India)
2. Department of Material Science and Engineering and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208 (United States)

We report intracellular biosynthesis of gold nanoparticles (GNPs) by a strain Stenotrophomonas maltophilia (AuRed02) isolated from the soil samples of Singhbhum gold mines, India. An aqueous solution of gold chloride was reduced to metallic gold in a suspension of disrupted cell mass of AuRed02, which progressively turns into cherry red within 8 h of incubation at 25 deg. C. The optical spectrum showed the plasmon resonance at 530 nm and analysis by transmission electron microscopy and dynamic light scattering confirmed the formation of around 40 nm GNPs. Zeta potential and Fourier transform infrared measurements confirmed GNPs are capped by negatively charged phosphate groups of NADP.

• OSTI ID: 21308696
• Journal Information: Applied Physics Letters, Vol. 94, Issue 23; Other Information: DOI: 10.1063/1.3141519; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
BIOPHYSICS
BIOSYNTHESIS
FOURIER TRANSFORMATION
GOLD
GOLD CHLORIDES
INFRARED SPECTRA
LIGHT SCATTERING
NANOSTRUCTURES
PARTICLES
PHOSPHATES
SUSPENSIONS
TRANSMISSION ELECTRON MICROSCOPY