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Green synthesis of non-spherical gold nanoparticles using Solidago canadensis L. extract

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In the present article, we reported the application of the extract of leaves from Solidago canadensis L. for the green synthesis of triangular and hexagonal gold nanoparticles (AuNPs). The phytochemical characterization, by reaction with HAuCl4 solutions, showed that the extract of Solidago canadensis L. contained the secondary metabolites that can act both as reducing and as stabilizing agents. For the synthesis of AuNPs, the effects of the HAuCl4 concentration (0.25–0.975 mM) and the reaction time (10–180 min) were investigated. The formation of AuNPs is confirmed by the color change from yellowish to purple-red. Photoluminescence measurements of Au nanocolloids showed a continuous emission band ranging from violet to red. UV–Vis characterization of AuNPs in the prepared nanocolloids showed surface plasmon resonance peaks at 530 and > 870 nm. TEM revealed that the AuNPs are in the range of 8–200 nm, they have spherical, triangular, and hexagonal forms of varying sizes. AFM and STM showed a non-ideal relief of large triangular and hexagonal gold nanoprisms. The EDX analysis, XRD and SAED patterns confirmed the face-center cubic structure of AuNPs.

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This study is partially supported by the KEGA project No. 018PU-4/2018 from the Ministry of Education, Science, Research and Sport of the Slovak Republic.

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Correspondence to Ruslan Mariychuk.

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Mariychuk, R., Grulova, D., Grishchenko, L.M. et al. Green synthesis of non-spherical gold nanoparticles using Solidago canadensis L. extract. Appl Nanosci 10, 4817–4826 (2020).

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