Surface enhanced IR absorption by cortisol molecules

I. A. Milekhin, S. A. Kuznetsov, A. G. Milekhin, T. A. Duda, O. P. Cherkasova, E. E. Rodyakina, A. V. Latyshev

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференции

Аннотация

We report on the study of surface enhanced infrared absorption (SEIRA) by steroid hormone cortisol molecules with different concentrations deposited on linear Au nanoantenna arrays. Localized surface plasmon resonances (LSPRs) arise in the nanoantennas under the influence of external electromagnetic radiation. LSPR frequency depends mainly on the nanoantenna length and can vary from the visible to the terahertz range. We establish the ratio between the structural parameters of nanoantenna arrays and LSPR frequencies based on the results of 3D electrodynamic simulations. Using nanolithography we fabricate nanoantenna arrays having LSPR frequencies close to the frequencies of the most intense absorption modes of steroid hormone cortisol. We deposit cortisol molecules onto the surface of nanoantenna arrays by drop-coating. SEIRA spectra of the nanoantenna arrays make it possible the determination of the presence of cortisol and establishing the sensitivity limit of this method. Thus, we show possibility of SEIRA application for cortisol concentration analysis.

Язык оригиналаанглийский
Номер статьи012087
ЖурналJournal of Physics: Conference Series
Том1092
DOI
СостояниеОпубликовано - 1 янв 2018
Событие3rd International Conference on Metamaterials and Nanophotonics, METANANO 2018 - Sochi, Российская Федерация
Продолжительность: 17 сен 201821 сен 2018

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