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

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

24 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

Bibliographical note

Funding Information:
We acknowledge financial support from the National Research Foundation (NRF) grant funded by the Korean Government (MEST) (Nos. 2012R1A2A2A01045102 and 2012R1A1A2A10043220).

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Surface enhanced Raman scattering effect of CdSe/ZnS quantum dots hybridized with Au nanowire",

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 (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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AU - Lee, Yong Baek

AU - Ho Lee, Seok

AU - Lee, Sunmi

AU - Lee, Hyunsoo

AU - Kim, Jeongyong

AU - Joo, Jinsoo

N1 - Funding Information: We acknowledge financial support from the National Research Foundation (NRF) grant funded by the Korean Government (MEST) (Nos. 2012R1A2A2A01045102 and 2012R1A1A2A10043220).

PY - 2013/1/21

Y1 - 2013/1/21

N2 - 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.

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

Abstract

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