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. 2018 Mar 2;8:3943. doi: 10.1038/s41598-018-22112-3

Figure 2.

Figure 2

Effect of different growth media on the synthesis of AuNPs (control experiments). PDB medium reduces gold salt and provide AuNPs with an average size of 17.3 nm with standard deviation of 11.5 nm (top panel- size distribution of produced NPs with TEM micrograph and a cuvette containing the solution of AuNPs). Modified Czapek-Dox medium produces no NPs, but microscopic gold precipitate (middle panel- SEM micrographs and a cuvette), which sediments from the solution. An antibiotic mixture of ampicillin and kanamycin can produce highly polydisperse AuNPs (bottom panel - size distribution of produced NPs with TEM micrograph and a cuvette containing the solution of AuNPs).