|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ПсковГУ |
||
Wavelength dependent gap-mode TERS by CdSe nanocrystals on a single Au nanodiskстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Milekhin I.A., Rahaman M., Tsarev A.V., Anikin K.V., Rodyakina E.E., Duda T.A., Saidzhonov B.M., Vasiliev R.B., Milekhin A.G., Latyshev A.V., Zahn D.R.T
- Журнал: Applied Surface Science
- Том: 686
- Год издания: 2025
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 162144
- DOI: 10.1016/j.apsusc.2024.162144
- Аннотация: Tip-Enhanced Raman Scattering (TERS) is a powerful method for studying the local properties of nanomaterials. In the gap-mode TERS configuration, the object of investigation is placed in the gap between a TERS probe and a plasmonic nanostructure, it is possible to reach a dramatic increase in Raman sensitivity by choosing the excitation wavelength and plasmonic substrate. Here, we investigate the effect of the excitation wavelength on the TERS response from CdSe nanocrystals on a single Au nanodisk using the gap-mode TERS. For excitation wavelengths of 638.2 and 785.3 nm, the gap-mode TERS by CdSe phonon modes is significantly enhanced at nanodisk edges, forming a ring-like TERS pattern. The diameter of the TERS ring obtained for 638.2 nm amounts to 130 nm. In case of 785.3 nm, the TERS ring diameter increases up to 150 nm that corresponds to the Au nanodisk diameter, while the TERS signal is 12 times stronger than that for 638.2 nm. The calculation results of the near-field scattering from the hot spot, arising between the TERS probe apex and the Au nanodisk covered with a thin CdSe film, using the Finite-Difference Time-Domain method, explain the influence of the excitation wavelength on the TERS pattern variation.
- Добавил в систему: Васильев Роман Борисович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|