Nanochemistry and biotechnology

Phytosynthesis and properties of non-spherical gold nanoparticles
Mariychuk R.1, Grishchenko L.M.2, Linnik R.P.2, Lisnyak V.V.2
1 Department of Ecology, Faculty of Humanities and Natural Sciences, University of Prešov in Prešov, 17th November Str. 1, 08001, Prešov, Slovakia.
E-mail: ruslan.mariychuk@unipo.sk
2 Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska Str. 62a, 01601 Kyiv, Ukraine.

The recent decade is marked by extensive studies in the fields of preparation, investigation of nanomaterials, and attempts of their application in different areas. Metallic nanoparticles (NPs) are a special class of nanomaterials with observed to be prospective for utilization in catalysis, sensing, medicine, electronics, etc. Therefore, there is a huge interest in the development of new, eco-friendly, cost- and time-efficient protocols for the preparation of NPs with controlled size and shape. Control over the shape of NPs allows changing the optical properties of NPs and opens the possibility to use them in surface-enhanced Raman spectroscopy, drug delivery systems, optical photo-thermal therapy, etc. Phytosynthesis of gold NPs (using plant extracts) delivers not only above mentioned benefits but also biocompatibility, which is important for application in biology and medicine.
Numerous studies in the field of phytosynthesis of gold NPs show that some extracts are suitable for the synthesis of spherical NPs [1]. But in other cases, extracts of some plants contain the components which support the formation of other shapes, like nanotriangles, nanohexagons, nanostars, nanorods, etc. [2].
This study is focused on the analysis of the experimental data (UV–Vis, IR and photoluminescence spectroscopies, scanning and transmission electron microscopies, and atomic force microscopy) obtained for non-spherical gold NPs prepared using extracts of Melissa oﬃcinalis L., Mentha piperita L., Juniperus communis L., and Solidago canadensis L.

1.	Mariychuk R., Fejer J., Porubska J., Grishchenko L.M., Lisnyak V.V. Appl. Nanosci.-2019. https://doi.org//10.1007/s13204-019-00990-x
2.	Mariychuk R., Yakovlieva V., Porubska J., Eliasova A., Lisnyak V.V. // Proc. Int. Council Env. Eng. Edu. – Tech. Env. Protection (ICTEP 2019). IEEExplore.-2019.-art. no. 8968965,-P.177-180. https://doi.org//10.1109/ICTEP48662.2019.8968965