Bacterial kinetics-controlled shape-directed biosynthesis of silver nanoplates using Morganella psychrotolerans

Ramanathan, Rajesh, O'Mullane, Anthony P., Parikh, Rasesh Y., Smooker, Peter M., Bhargava, Suresh K., & Bansal, Vipul (2011) Bacterial kinetics-controlled shape-directed biosynthesis of silver nanoplates using Morganella psychrotolerans. Langmuir, 27(2), pp. 714-719.

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We show for the first time that by controlling the growth kinetics of Morganella psychrotolerans, a silver-resistant psychrophilic bacterium, the shape anisotropy of silver nanoparticles can be achieved. This is particularly important considering that there has been no report that demonstrates a control over shape of Ag nanoparticles by controlling the growth kinetics of bacteria during biological synthesis. Additionally, we have for the first time performed electrochemistry experiments on bacterial cells after exposing them to Ag(+) ions, which provide significant new insights about mechanistic aspects of Ag reduction by bacteria. The possibility to achieve nanoparticle shape control by using a "green" biosynthesis approach is expected to open up new exciting avenues for eco-friendly, large-scale, and economically viable shape-controlled synthesis of nanomaterials.

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40 citations in Web of Science®

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ID Code: 64280
Item Type: Journal Article
Refereed: Yes
Additional Information: Prior to commencement at QUT
DOI: 10.1021/la1036162
ISSN: 1520-5827
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 21 Nov 2013 01:36
Last Modified: 21 Nov 2013 23:14

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