Plasmonic colloidal Au nanoparticles in DMSO: a facile synthesis and characterisation

Volodymyr Dzhagan; Olga Kapush; Svitlana Plokhovska; Anastasiya Buziashvili; Yaroslav Pirko; Oleg Yeshchenko; Volodymyr Yukhymchuk; Alla Yemets; Dietrich R. T. Zahn

doi:10.1039/D2RA03605C

Plasmonic colloidal Au nanoparticles in DMSO: a facile synthesis and characterisation

Volodymyr Dzhagan,

*^ab Olga Kapush,^a Svitlana Plokhovska,

^c Anastasiya Buziashvili,^c Yaroslav Pirko,^d Oleg Yeshchenko,^b Volodymyr Yukhymchuk,^a Alla Yemets

^c and Dietrich R. T. Zahn

^ef

Author affiliations

* Corresponding authors

^a V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
E-mail: dzhagan@isp.kiev.ua

^b Physics Department, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine

^c Department of Cell Biology and Biotechnology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of Ukraine, 04123 Kyiv, Ukraine

^d Department of Population Genetics, Institute of Food Biotechnology and Genomics, National Academy of Sciences of Ukraine, Osypovskogo str., 2a, Kyiv, Ukraine

^e Semiconductor Physics, Chemnitz University of Technology, Chemnitz, Germany

^f Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, Chemnitz, Germany

Abstract

We report a new pathway for the synthesis of plasmonic gold nanoparticles (Au NPs) in a bio-compatible medium. A modified room temperature approach based on the standard Turkevich synthesis, using sodium citrate as a reducing and stabilizing agent, results in a highly stable colloidal suspension of Au NPs in dimethyl sulfoxide (DMSO). The mean NP size of about 15 nm with a fairly low size distribution is revealed by scanning electron microscopy. The stability test through UV-vis absorption spectroscopy indicates no sign of aggregation for months. The Au NPs are also characterized by X-ray photoelectron, Raman scattering, and FTIR spectroscopies. The stabilisation mechanism of the Au NPs in DMSO is concluded to be similar to that of NPs synthesized in water. The Au NPs obtained in this work are applicable as SERS substrates, as proved by common analytes. In terms of bio-applications, they do not possess such side-effects as pronounced antibacterial activity, based on the tests performed on non-pathogenic Gram-positive or Gram-negative bacteria.

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Plasmonic colloidal Au nanoparticles in DMSO: a facile synthesis and characterisation

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