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Erschienen in: Journal of Nanoparticle Research 10/2020

01.10.2020 | Research paper

Surface-enhanced Raman scattering and photothermal effect of hollow Au nanourchins with well-defined cavities

verfasst von: Joon Ki Kim, Tae-Hyeon Park, Du-Jeon Jang

Erschienen in: Journal of Nanoparticle Research | Ausgabe 10/2020

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Abstract

We have prepared genuinely hollow Au nanourchins (HANUs) using SiO2 nanoparticles (NPs) as hard templates. Ag-SiO2 NPs were fabricated via amine-assisted reduction. Then, Au nanourchins (ANUs) were synthesized by the galvanic replacement reaction of Ag-SiO2 NPs using l-3,4-dihydroxyphenylalanine (DOPA) as a reductant and a capping agent. The silica cores of ANUs were etched using HF (aq) to produce HANUs. Measuring cross sections, we have found that HANUs have well-defined hollow morphologies. Compared with nanourchins made via DOPA-mediated reduction, HANUs hardly contain residual silver because very tiny silver seeds were used as the initiation sites of galvanic replacement. HANUs have revealed large surface-enhanced Raman scattering enhancement and a significant photothermal effect under a weak illumination.

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Metadaten
Titel
Surface-enhanced Raman scattering and photothermal effect of hollow Au nanourchins with well-defined cavities
verfasst von
Joon Ki Kim
Tae-Hyeon Park
Du-Jeon Jang
Publikationsdatum
01.10.2020
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 10/2020
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-020-05034-y

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