SPATIALLY SELECTIVE MODIFICATION OF GOLD NANORODS

1,2 OLSHTREM Anastasiia
Co-authors:
1,2 GUSELNIKOVA Olga 2 POSTNIKOV Pavel 1 SVORCIK Vaclav 1,2 LYUTAKOV Oleksiy
Institutions:
1 VŠCHT - University of Chemistry and Technology, Prague, Czech Republic, EU, lyutakoo@vscht.cz
2 Tomsk Polytechnic University, Research School of Chemistry and Applied Biomedical Sciences, Tomsk, Russian Federation
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
379-384
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
Published:
1st April 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
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Abstract

In this contribution, we present the new approach for plasmon assisted grafting of anisotropic gold nanorods (AuNRs) with spatial selectivity, which was used for creation of nanoparticles with amphiphilic surface. The surface modification was carried out in two stages with implementation of: (I) the plasmon-activated iodonium salt (IS), and (II) the aryl diazonium salt (ADT). The plasmon assisted activation of IS was performed under the illumination of AuNRs with wavelength corresponded to the longitudinal plasmon resonance of AuNRs and resulted in grafting of organic moieties (Ar-(CF3)2) to AuNRs edges. The AuNRs lateral sides remains ungrafted and were further decorated with ADT-COOH. As result of varying substituents in the chemical structures of iodonium and diazonium salts the amphiphilic NPs with spatially divided hydrophobic (grafted to AuNRs edges) and hydrophilic (grafted to AuNRs lateral sides) chemical groups were obtained. Corresponded UV-Vis and Raman measurements confirm the success of AuNRs chemical grafting. As result, the AuNRs with spatially separated chemical moieties were created in very simple way, primarily in solution and without the need of sophisticated technique of NPs mobilization or their surface screening.

Keywords: Plasmon-assisted chemical transformation, gold nanorods, surface grafting, amphiphilic nanoparticles
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