Surface enhanced Raman scattering effect of CdSe/ZnS quantum dots hybridized with Au nanowire

Yong Baek Lee; Seok Ho Lee; Sunmi Lee; Hyunsoo Lee; Jeongyong Kim; Jinsoo Joo

doi:10.1063/1.4788926

Surface enhanced Raman scattering effect of CdSe/ZnS quantum dots hybridized with Au nanowire

Yong Baek Lee, Seok Ho Lee, Sunmi Lee, Hyunsoo Lee, Jeongyong Kim, Jinsoo Joo

Department of Physics

Research output: Contribution to journal › Article

16 Citations (Scopus)

Abstract

Functionalized CdSe/ZnS quantum dots (QDs) were attached to the surface of Au nanowire (NW). Analysis of optical absorption spectra disclosed surface plasmon bands of Au NWs at 562 and 627 nm and showing an overlap with the QD absorption band. Micro Raman spectra (λ_ex = 514 nm) of the QDs/Au single NW exhibited surface enhanced Raman scattering (SERS) peaks at 180, 205, and 277 cm^-1, corresponding to surface, longitudinal, and transverse optical phonon modes, respectively. From time-resolved fluorescence spectra, the exciton lifetime of QDs decreased after hybridization with Au NW due to the energy transfer, supporting the SERS effect.

Original language	English
Article number	033109
Journal	Applied Physics Letters
Volume	102
Issue number	3
DOIs	https://doi.org/10.1063/1.4788926
Publication status	Published - 2013 Jan 21

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ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Cite this

Lee, Y. B., Ho Lee, S., Lee, S., Lee, H., Kim, J., & Joo, J. (2013). Surface enhanced Raman scattering effect of CdSe/ZnS quantum dots hybridized with Au nanowire. Applied Physics Letters, 102(3), [033109]. https://doi.org/10.1063/1.4788926

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AB - Functionalized CdSe/ZnS quantum dots (QDs) were attached to the surface of Au nanowire (NW). Analysis of optical absorption spectra disclosed surface plasmon bands of Au NWs at 562 and 627 nm and showing an overlap with the QD absorption band. Micro Raman spectra (λex = 514 nm) of the QDs/Au single NW exhibited surface enhanced Raman scattering (SERS) peaks at 180, 205, and 277 cm-1, corresponding to surface, longitudinal, and transverse optical phonon modes, respectively. From time-resolved fluorescence spectra, the exciton lifetime of QDs decreased after hybridization with Au NW due to the energy transfer, supporting the SERS effect.

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10.1063/1.4788926