Studies on the electronic and vibrational states of colloidal CdSe/ZnS quantum dots under high pressures

C. T. Yuan, Y. C. Lin, Y. N. Chen, Q. L. Chiu, W. C. Chou, D. S. Chuu, W. H. Chang, H. S. Lin, R. C. Ruaan, C. M. Lin

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12 Citations (Scopus)

Abstract

The electronic and vibrational states of colloidal core/shell CdSe/ZnS quantum dots are studied at room temperature by using high pressure optical measurements. Pressure-induced quadratic variations of lattice constants can be observed clearly from both photoluminescence (PL) and Raman spectra up to ∼7 GPa. This quadratic relationship is consistent with the theoretical prediction. The pressure coefficients of linear and quadratic terms are 32 meV GPa -1, -1 meV GPa-2 for PL and 4.2 cm-1 GPa -1, -0.1 cm-1 GPa-2 for Raman measurements, respectively.

Original languageEnglish
Article number185402
JournalNanotechnology
Volume18
Issue number18
DOIs
Publication statusPublished - 2007 May 9

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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