Gold nanostars and nanoantennas: tuning of optical properties and coating with silica shell
Vitaly A. Khanadeev,1,2 Andrey V. Simonenko,1,3 Anton S. Oleinikov,1,3 Kirill V. Lobanov,3 Nikolai G. Khlebtsov,1,3
1 Institute of Biochemistry and Physiology of Plants and Microorganisms – Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), Saratov, Russia;
2 Saratov State University of Genetics, Biotechnology and Engineering Named after N. I. Vavilov, Saratov, Russia;
3 Saratov State University, Saratov, Russia;
Abstract
Star-shaped gold nanoparticles have great potential for use in biomedical applications due to the developed synthesis protocols, which provide great opportunities for tuning morphological and optical properties. Silica coating of gold nanoparticles can be used for several purposes. In particular, to preserve the optical properties of individual gold nanoparticles, as well as to create composite nanoparticles that can be doped with drugs for targeted delivery.
This report presents the results of tuning the optical properties of gold nanostars and nanoantennas synthesized by wet chemistry methods by adjusting the synthesis parameters. The results of coating these nanoparticles with a silica shell of controlled thickness are presented, and the parameters affecting the uniformity and thickness of the synthesized shell are determined. The morphological and optical properties of gold nanostars and nanoantennas before and after shell coating were studied by electron microscopy and absorption spectroscopy.
The obtained results can be used to create nanoparticles with desired characteristics intended for use in specific biomedical applications. Particularly important areas may be photothermal therapy, drug delivery, and SERS spectroscopy.
This work was supported by the Russian Science Foundation (project No. 23-22-00354,
https://rscf.ru/en/project/23-22-00354/).
Speaker
Vitaly A. Khanadeev
Institute of Biochemistry and Physiology of Plants and Microorganisms – Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), Saratov, Russia; Saratov State Univer
Russia
Discussion
Ask question
