Hybrids of Two-dimensional Colloidal Crystals and Gold Nanoparticle Assemblies for Effective Surface-enhanced Raman Scattering with High Spatial Reproducibility

Hybrids of Two-dimensional Colloidal Crystals and Gold Nanoparticle Assemblies for Effective Surface-enhanced Raman Scattering with High Spatial Reproducibility

We have fabricated hybrids of two-dimensional silica colloidal crystals and gold nanospheres for the development of platforms showing effective SERS phenomenon with a high spatial reproducibility. The SERS signal of 4-mercaptobenzoic acid immobilized on the hybrids was enhanced up to 10.4 times by o...

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Veröffentlicht in:Chemistry letters 2018-01, Vol.47 (4), p.429
Hauptverfasser: Danno, Miu, Yoshinari, Satoshi, Shuto Igari, Honda, Jotaro, Eguchi, Takumi, Inoue, Wataru, Yasuhara, Keita, Hara, Shuta, Ikake, Hiroki, Shimizu, Shigeru, Toyama, Takeshi, Kusaka, Yasuyuki, Fukuda, Nobuko, Ushijima, Hirobumi, Takase, Kouichi, Sugawa, Kosuke, Otsuki, Joe
Format: Artikel
Sprache:eng ; fre ; ger ; jpn
Schlagworte:
Gold
Nanospheres
Raman spectra
Reproducibility
Silicon dioxide
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Zusammenfassung:We have fabricated hybrids of two-dimensional silica colloidal crystals and gold nanospheres for the development of platforms showing effective SERS phenomenon with a high spatial reproducibility. The SERS signal of 4-mercaptobenzoic acid immobilized on the hybrids was enhanced up to 10.4 times by optimizing the silica diameter, as compared with that on the gold nanospheres immobilized on a planar glass plate. We propose that the effective enhancement is induced by hot spots generated at the junction regions between the silica nanospheres.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.171185