Biosynthesis of platinum nanoparticles by Escherichia coli MC4100: can such nanoparticles exhibit intrinsic surface enantioselectivity?

Langmuir : the ACS Journal of Surfaces and Colloids
Gary AttardKevin Deplanche

Abstract

The biomanufacture of two types of platinum bionanoparticle (bioNP) using Escherichia coli MC4100(1% and 20% by mass metal loading) together with a method for both liberating the nanoparticles (NPs) from the bacterial layer and their subsequent critical cleaning is reported. The possibility of an enantiomeric excess of chiral kink sites forming on the surface of the Pt nanoparticles produced by the bacteria was investigated using the electrooxidation of D- and L-glucose as the chiral probe. Transmission electron microscopy revealed that the Pt bioNPs (after recovery and cleaning) were typically 2.3 ± 0.7 nm (1% loading) and 4.5 ± 0.7 nm (20% loading) in diameter. The D- and L-glucose electrooxidation measurements did not give rise to any chiral response using either of the Pt bioNPs types but did display differing CV profiles. This suggested that the overall surface morphology of each bioNP could be controlled by the degree of metal loading but that no enantiomeric excess of intrinsically chiral surface kink sites was present.

References

Mar 7, 2003·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Gary A AttardJennifer E Gillies
Jun 23, 2004·Nature Materials·S Shiv ShankarMurali Sastry
Dec 1, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Anshup AnshupT Pradeep
Aug 9, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Maggy F LengkeGordon Southam
Apr 6, 2007·Journal of Environmental Monitoring : JEM·Stuart HarradLynne E Macaskie
Oct 31, 2007·Biotechnology and Bioengineering·K Deplanche, L E Macaskie
Oct 31, 2007·Biotechnology and Bioengineering·Mark D RedwoodLynne E Macaskie

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Citations

Apr 27, 2013·International Journal of Nanomedicine·Mujeeb KhanMohammed Rafiq H Siddiqui
Feb 20, 2014·Nature Communications·Chularat WattanakitAlexander Kuhn
Jun 18, 2015·Chemical Society Reviews·Jiale HuangQingbiao Li
Oct 20, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Subhra Jana
Dec 16, 2018·Angewandte Chemie·Sunpet AssavapanumatAlexander Kuhn
Mar 26, 2021·Frontiers in Chemistry·Khalida BlochSougata Ghosh

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