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. 2016 Aug 26;7:1219–1228. doi: 10.3762/bjnano.7.113

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Copyright © 2016, Bayram et al.

This is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)

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Extinction spectra of AgNPs modified by varying ratios of ligands: A) cysteamine, B) DTT and C) cysteine. Legend: r = number of ligand molecules/AgNP. Insets show the growth of the longitudinal plasmon band (LP) relative to the transverse band (SP) as a function of r. Error bars represent the standard deviations of independent spectral measurements from the average value for every ligand ratio. The most intense anisotropy is noticed in the case of cysteamine-modified AgNPs with a ratio exceeding unity at 5000 < r < 9000.