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; Wu-Ching Chou; D. S. Chuu; W. H. Chang; H. S. Lin; R. C. Ruaan; C. M. Lin

doi:10.1088/0957-4484/18/18/185402

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, Wu-Ching Chou^*, D. S. Chuu, W. H. Chang, H. S. Lin, R. C. Ruaan, C. M. Lin

^*Corresponding author for this work

Department of Electrophysics

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

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 language	English
Article number	185402
Journal	Nanotechnology
Volume	18
Issue number	18
DOIs	https://doi.org/10.1088/0957-4484/18/18/185402
State	Published - 9 May 2007

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

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.",

author = "Yuan, {C. T.} and Lin, {Y. C.} and Chen, {Y. N.} and Chiu, {Q. L.} and Wu-Ching Chou and Chuu, {D. S.} and Chang, {W. H.} and Lin, {H. S.} and Ruaan, {R. C.} and Lin, {C. M.}",

year = "2007",

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T1 - Studies on the electronic and vibrational states of colloidal CdSe/ZnS quantum dots under high pressures

AU - Yuan, C. T.

AU - Lin, Y. C.

AU - Chen, Y. N.

AU - Chiu, Q. L.

AU - Chou, Wu-Ching

AU - Chuu, D. S.

AU - Chang, W. H.

AU - Lin, H. S.

AU - Ruaan, R. C.

AU - Lin, C. M.

PY - 2007/5/9

Y1 - 2007/5/9

N2 - 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.

AB - 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.

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