Thermal Dynamics of Plasmonic Nanoparticle Composites

“…Low-power laser induction increased biocompatibility compared to previously reported high-power pulsed laser or conventional heating. Dissipation of LSP energy confined heating to the AuNPs and solvent at the interface, minimizing collateral heating of the adjacent PDMS surface and substrate (glass or leaf cuticle). ,, Ethanol was preferred as the chemical solvent to wet PDMS/glass and PDMS/leaf cuticle interfaces due to its biocompatibility. Solvating with deionized distilled (DI) water, 50:50 DI water/ethanol, 80:20 DI water/ethanol, or 90:10 DI water/ethanol did not transfer the AuNP onto leaf cuticle substrates.…”

“…The latter rapidly decay nonradiatively into a nonequilibrium distribution of hot carriers that equilibrate with the colder metal lattice, 26 entailing the heating of the surrounding microenvironment. 27 − 30 Importantly, such a mechanism occurs at an ultrafast rate and generates a strongly localized and finely controllable increase in temperature, which makes plasmonic nanostructures particularly suitable as nanosources for local heating.…”

“…Such a great interest in plasmonic materials is motivated by the efficient and easily tunable light-to-heat conversion upon the excitation of localized surface plasmon resonances (LSPRs), , that is, coherent oscillations of the metal conduction electrons. The latter rapidly decay nonradiatively into a nonequilibrium distribution of hot carriers that equilibrate with the colder metal lattice, entailing the heating of the surrounding microenvironment. − Importantly, such a mechanism occurs at an ultrafast rate and generates a strongly localized and finely controllable increase in temperature, which makes plasmonic nanostructures particularly suitable as nanosources for local heating.…”

“…NPs dispersed in colloidal suspensions of various fluids (i.e., nanofluids) resulted in an increase in the thermal conductivity of the suspension [19], but the thermal response per NP decreased to near zero [20]. Numerical models for estimating and modeling the heat dissipation have also been used to analyze nanofluids used in microchannels [21], while other models utilize the thermodynamic properties to predict the structure of materials [22,23]. Heat exchangers and other thermodynamic components have recently been constructed using NP-containing materials in order to analyze the heat transfer properties of the materials and components [24].…”