Title :
Biomimetic synthesis of selenium nanoparticles using cell-free extract of microbacterium sp. ARB05
Author :
Prasad, K. Satya ; Vyas, Piyush ; Prajapati, V. ; Patel, Pragati ; Selvaraj, K.
Author_Institution :
Dept. of Environ. Biotechnol., Ashok & Rita Patel Inst. of Integrated Study, Anand, India
fDate :
1/1/2012 12:00:00 AM
Abstract :
This Letter is a novel approach to synthesise a bio-functionalised selenium nanoparticles using cell-free extract of selenium-resistant bacterial isolate. Phylogenetic analysis of isolate suggested its close similarity with Microbacterium luteolum (Y17235.1) and Microbacterium oxydans str. TPL09 (EU373379.1) while it was distantly related to Microbacterium dextranolyticum (Y17230.1). Selenium colloidal solution exhibited an absorption maximum at 300 nm and gave emission maximum at 590 nm. Transmission electron microscopy followed by selected area electron diffraction pattern analysis indicated the formation of spherical, polydispersed, crystalline, Se nanoparticles of diameter ranging from 30 to 150 nm. X-ray diffraction results showed 111, 200 and 220 planes of face-centred cubic selenium. Energy dispersive analysis of X-rays confirmed the presence of selenium in nanosphere. Selenium nanoparticles synthesised in this manner can be studied for chemo-prevention as well as its fluorescent property can be utilised for molecular diagnostics in cancer research.
Keywords :
X-ray chemical analysis; biological techniques; biomedical materials; biomimetics; cellular biophysics; electron diffraction; fluorescence; microorganisms; nanomedicine; nanoparticles; selenium; transmission electron microscopy; Microbacterium dextranolyticum; Microbacterium luteolum; Microbacterium oxydans str. TPL09; Microbacterium sp. ARB05 cell-free extract; Se; X-ray diffraction; bio-functionalised selenium nanoparticle; biomimetic synthesis; cancer research; crystalline nanoparticle; energy dispersive analysis; face-centred cubic selenium; fluorescent property; molecular diagnostics; nanosphere; of selenium-resistant bacterial isolate; phylogenetic analysis; polydispersed nanoparticle; selected area electron diffraction pattern analysis; selenium colloidal solution; spherical nanoparticle; transmission electron microscopy; wavelength 300 nm to 590 nm;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2011.0498