Resonant tip-enhanced Raman scattering by CdSe nanocrystals on plasmonic substrates

I. A. Milekhin, M. Rahaman, K. V. Anikin, E. E. Rodyakina, T. A. Duda, B. M. Saidzhonov, R. B. Vasiliev, V. M. Dzhagan, A. G. Milekhin, A. V. Latyshev, D. R.T. Zahn

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

1 Цитирования (Scopus)

Аннотация

Tip-enhanced Raman scattering (TERS) has recently emerged as a powerful technique for studying the local properties of low dimensional materials. Being a plasmon driven system, a dramatic enhancement of the TERS sensitivity can be achieved by an appropriate choice of the plasmonic substrate in the so-called gap-mode configuration. Here, we investigate the phonon properties of CdSe nanocrystals (NCs) utilizing gap-mode TERS. Using the Langmuir-Blodgett technique, we homogeneously deposited submonolayers of colloidal CdSe NCs on two different nanostructured plasmonic substrates. Amplified by resonant gap-mode TERS, the scattering by the optical phonon modes of CdSe NCs is markedly enhanced making it possible to observe up to the third overtone of the LO mode reliably. The home-made plasmonic substrates and TERS tips allow the analysis of the TERS images of CdSe phonon modes with nanometer spatial resolution. The CdSe phonon scattering intensity is strongly correlated with the local electromagnetic field distribution across the plasmonic substrates. This journal is

Язык оригиналаанглийский
Страницы (с-по)5441-5449
Число страниц9
ЖурналNanoscale Advances
Том2
Номер выпуска11
DOI
СостояниеОпубликовано - ноя 2020

Fingerprint Подробные сведения о темах исследования «Resonant tip-enhanced Raman scattering by CdSe nanocrystals on plasmonic substrates». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать