TY - JOUR
T1 - Optical properties and surface-enhanced Raman scattering activity of hexagonally arranged gold nanoparticle trimers
AU - Uchida, Takako
AU - Ichikawa, Yoichi
AU - Imura, Kohei
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas “Photosynergetics (No. 2606 )” from MEXT , Japan, and Grants-in-Aid for Scientific Research (Grant Nos. 24655020 , 24350014 , 25109713 , 26620018 , 26107003 ) from the Japan Society for the Promotion of Science and from the Ministry of Education, Culture, Sports, Science and Technology . The work was also supported in part by the Nanotechnology Platform Program and Equipment Center of Institute for Molecular Science .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - We studied optical properties of hexagonally arranged gold nanoparticle trimer assembly using optical microscopy. We found that the scattering spectrum showed multiple resonances in the visible region. We simulated the optical properties by assuming a pair of trimers as a model structure. The simulated spectrum reproduced the resonance features observed, and were assigned to plasmon-modes excited. Surface-enhanced Raman Scattering (SERS) activity of the assembly was found to be dependent on the excitation wavelength. The highest SERS enhancement was achieved with 633 nm excitation, reaching 108. The wavelength-dependency of the activity indicates that plasmonic fields are responsible for the enhancement.
AB - We studied optical properties of hexagonally arranged gold nanoparticle trimer assembly using optical microscopy. We found that the scattering spectrum showed multiple resonances in the visible region. We simulated the optical properties by assuming a pair of trimers as a model structure. The simulated spectrum reproduced the resonance features observed, and were assigned to plasmon-modes excited. Surface-enhanced Raman Scattering (SERS) activity of the assembly was found to be dependent on the excitation wavelength. The highest SERS enhancement was achieved with 633 nm excitation, reaching 108. The wavelength-dependency of the activity indicates that plasmonic fields are responsible for the enhancement.
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U2 - 10.1016/j.cplett.2015.09.007
DO - 10.1016/j.cplett.2015.09.007
M3 - Article
AN - SCOPUS:84941924326
SN - 0009-2614
VL - 638
SP - 253
EP - 257
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -