Abstract
Biosynthesis of gold nanoparticles and nanoplates (GNPs) was accomplished using aqueous fractions of pear extract as a safe, reducing, particle-stabilizing, and shape-directing agent. The maximum yields of spherical gold nanoparticles having the average sizes of 40, 20, and 10 nm were achieved at 30, 60, and 90 °C, respectively, at a pear extract concentration of 45% (v/v). The maximum yield of gold nanoplates was obtained with sizes ranging from 20 to 400 nm, particularly at reaction temperatures of 30, 60, and 90 °C, at a pear extract concentration of 5% (v/v). The surface chemistry analysis of the GNPs suggests that the sugars and peptides or proteins as key biomolecules of the pear extract play a crucial role in the reduction of Au(III), subsequently resulting in healthy capping. Therefore, this environmentally friendly synthesis method of GNPs for the particular type of morphologies is expected to be a competitive alternative to existing physical and chemical methods.
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Ghodake, G., Lee, D.S. Green synthesis of gold nanostructures using pear extract as effective reducing and coordinating agent. Korean J. Chem. Eng. 28, 2329–2335 (2011). https://doi.org/10.1007/s11814-011-0115-4
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DOI: https://doi.org/10.1007/s11814-011-0115-4