Raman scattering for probing semiconductor nanocrystal arrays with a low areal density

Alexander G. Milekhin, Nikolay A. Yeryukov, Larisa L. Sveshnikova, Tatyana A. Duda, Sergey S. Kosolobov, Alexander V. Latyshev, Nikolay V. Surovtsev, Sergey V. Adichtchev, Cameliu Himcinschi, Eduard I. Zenkevich, Wen Bin Jian, Dietrich R.T. Zahn

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We present a study of resonant and surface enhanced Raman scattering by arrays of nanocrystals (cadmium sulfide CdS, lead selenide PbSe, and zinc oxide ZnO) with various areal density fabricated by using the Langmuir-Blodgett technique and colloidal chemistry. Resonant Raman scattering by transverse, longitudinal, and surface optical (TO, LO, and SO) phonons and their overtones up to ninth order was achieved for nanocrystal (NC) arrays by adjusting the laser energy to that of the interband transitions. The resonance enhancement allowed a Raman response from arrays of NCs with a low areal density (down to 10 PbSe NCs per 1 μm 2) to be measured. An enhancement of Raman scattering by LO and SO modes in CdS NC arrays with a low areal density by a factor of about 730 was achieved due to the resonant surface enhanced Raman scattering effect.

Original languageEnglish
Pages (from-to)17164-17168
Number of pages5
JournalJournal of Physical Chemistry C
Volume116
Issue number32
DOIs
Publication statusPublished - 16 Aug 2012
Externally publishedYes

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