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| - Transformed Gold Island Film Improves Light-to-Heat Transduction of Nanoparticles on Silica Capillaries
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| Abstract
| - Gold (Au) nanoparticles (NP) assembled on inner walls of silica (SiO2) capillaries dissipated ≥10-fold more heat (≥96.92 ± 8.94 vs ≤9.92 ± 2.06%) from incident photons via localized surface plasmon resonance (LSPR) with a 10-fold faster response time (≤8.39 ± 1.05 vs ≥86.30 ± 8.61 s) than colloidal Au NPs suspended in H2O. Au NP assemblies were created by thermal transformation of gold island film (TGIF) that was electrolessly plated on the inner capillary wall to form an optical plasmon capillary (OPC). Enhanced laser-to-heat transduction of the solid-state Au NP OPC resulted from the ability to tune the LSPR peak to the laser line, elimination of laser- or heat-induced NP aggregation, and enhanced thermal transport of the Au NP assembly on the OPC. This yielded ≥6.4-fold higher temperature increase per unit incident laser power (157.07 ± 21.68 vs 24.51 ± 4.45 °C watt−1) relative to suspended Au NPs. Thermal behavior of the OPC was predictable using design equations obtained from an overall energy balance and consistent with nanoscale opto-thermal expressions.
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| - Light-to-Heat Transduction of Nanoparticles
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