Surface-enhanced Raman scattering by CdS quantum dots

Author

Milekhin, Alexander G. ; Sveshnikova, Larisa ; Duda, Tatyana ; Surovtsev, Nikolay ; Adichtchev, Sergei ; Zahn, Dietrich R T

Author_Institution

Inst. of Semicond. Phys., Novosibirsk, Russia

fYear

2009

fDate

1-6 July 2009

Firstpage

112

Lastpage

115

Abstract

Surface enhanced Raman scattering is studied in nanostructures with CdS quantum dots formed by using the Langmuir-Blodgett technology. Features related to longitudinal optical phonons of quantum dots are observed in the Raman spectra of both free-standing CdS quantum dots and the dots embedded in an organic matrix. Strong enhancement of intensity (about factor of 700) of Raman scattering by free quantum dots is observed by deposition of silver clusters onto the nanostructure surfaces. The dependence of the Raman intensity on the excitation energy is resonant with a maximum at the energy corresponding to the maximal absorption of Ag clusters.

Keywords

II-VI semiconductors; cadmium compounds; nanofabrication; nanostructured materials; organic compounds; phonons; semiconductor quantum dots; silver; spectral line intensity; surface enhanced Raman scattering; CdS-Ag; Langmuir-Blodgett technology; Raman intensity; Si; Si substrates; SiO₂; excitation energy; longitudinal optical phonons; nanostructure surfaces; organic matrix; quartz substrates; semiconductor quantum dots; silver clusters; surface-enhanced Raman scattering; Biomedical optical imaging; Nanobioscience; Nanostructures; Optical scattering; Phonons; Quantum dot lasers; Quantum dots; Raman scattering; Rough surfaces; Surface roughness; Surface enhanced Raman scattering; phonons; quantum dots;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro/Nanotechnologies and Electron Devices, 2009. EDM 2009. International Conference and Seminar on

Conference_Location

Novosibirsk

Print_ISBN

978-1-4244-4571-4

Type

conf

DOI

10.1109/EDM.2009.5173943

Filename

5173943