Helicene-SPP Based Chiral Plasmonic Hybrid Structure: Toward Direct Enantiomers SERS Discrimination.

0500196 - ÚCHP 2020 RIV US eng J - Journal Article
Kalachyova, Y. - Guselnikova, O. - Elashnikov, R. - Panov, Illia - Žádný, Jaroslav - Církva, Vladimír - Storch, Jan - Sýkora, Jan - Záruba, K. - Švorčík, V. - Lyutakov, O.
Helicene-SPP Based Chiral Plasmonic Hybrid Structure: Toward Direct Enantiomers SERS Discrimination.
ACS Applied Materials and Interfaces. Roč. 11, č. 1 (2019), s. 1555-1562. ISSN 1944-8244. E-ISSN 1944-8252
R&D Projects: GA ČR GA15-12719S; GA MPO FV10082
Grant - others:TPU(RU) VIU-RSCABS-195/2018
Institutional support: RVO:67985858
Keywords : circular plasmon * helicene * chiral SERS
OECD category: Physical chemistry
Impact factor: 8.758, year: 2019
Method of publishing: Limited access

Achieving chiral-plasmon response based on the combination of achiral plasmonic nanostructures with highly chiral surrounding medium represents an attractive way for creation of hybrid optically active plasmonic materials. In this work, we present an attractive design and fabrication of chiral plasmon substrates based on a surface plasmon-polariton supported structure coupled with extremely optically active helicene enantiomers. Such approach allows us to excite chiral plasmon waves and to design optically active SERS substrates. Its further combination with standard Raman spectroscopy makes possible enantio-selective detection/recognition of optical enantiomers with detection limits below those of standard spectral techniques. The chiral optical response of new plasmonic system was observed and controlled by the optical rotation of helicenes. Without necessity of previous chiral separation or implementation of sophisticated experimental equipment, we were able to estimate the concentration of enantiomers in their mixture by using left- or right-handed chiral plasmon substrates.
Permanent Link: http://hdl.handle.net/11104/0294049