Experimental and Computational Studies of the Structure of CdSe Magic-Size Clusters

Igor Dmitruk, Rodion V. Belosludov, Andriy Dmytruk, Yasuto Noda, Yuri Barnakov, Yeon Su Park, Atsuo Kasuya

Research output: Contribution to journalArticle

Abstract

Experimental and computational studies of resonant Raman spectra of truly monosized (CdSe)33 and (CdSe)34 nanoclusters have been performed. First-principles calculations of vibrations are performed to account for the peculiarity of the spectrum and resonant Raman selection rules. The calculation method is based on the analysis of the spatial distribution of the electron density in the ground and excited states and the corresponding displacement of atoms after the electronic transition. The calculated vibrational density of states and resonant Raman spectra of CdSe nanoclusters in a core-cage arrangement are distinctively different from those of small nanocrystals in the bulk fragment model and reasonably agree with the experimentally observed spectral features. The agreement can be considered as experimental evidence for the shell structure of "magic" CdSe nanoclusters. The resonant conditions for the Raman measurements and two different kinds of samples stabilized with decylamine in toluene and with cysteine in water ensure the reliability of our measurements and the minor influence of the stabilizer.

Original languageEnglish
Pages (from-to)3398-3406
Number of pages9
JournalJournal of Physical Chemistry A
Volume124
Issue number17
DOIs
Publication statusPublished - 2020 Apr 30

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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