期刊
ACS NANO
卷 9, 期 5, 页码 5551-5558出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b01673
关键词
thermoplasmonics; nanowire networks; temperature microscopy; nanowelding
类别
资金
- European Research Council [321160]
- Science Foundation Ireland (SFI) [SFI/12/RC/2278]
- Irish Research Council EMPOWER Fellowship
- Irish Research Council ULYSSES
- Agence Nationale de la Recherche (ANR) grant NATO [ANR-13-BS10-0013]
- Agence Nationale de la Recherche (ANR) [ANR-13-BS10-0013] Funding Source: Agence Nationale de la Recherche (ANR)
In this article, we present a comprehensive investigation of the photothermal properties of plasmonic nanowire networks. We measure the local steady-state temperature increase, heat source density, and absorption in Ag, Au, and Ni metallic nanowire networks under optical illumination. This allows direct experimental confirmation of increased heat generation at the junction between two metallic nanowires and stacking-dependent absorpfion of polarized light. Due to thermal collective effects, the local temperature distribution in a network is shown to be completely delocalized on a micrometer scale, despite the nanoscale features in the heat source density. Comparison of the experimental temperature profile with numerical simulation allows an upper limit for the effective thermal conductivity of a Ag nanowire network to be established at 43 Wm(-1) K-1 (0.1 kappa(bulk)).
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