Journal
NANOTECHNOLOGY
Volume 23, Issue 37, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/37/375703
Keywords
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Funding
- NSF [CMMI-0909749, ECCS-1006927, CBET 1134222]
- University of Arkansas Foundation
- Walton Family Charitable Support Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1134222] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1006927] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Engineering Education and Centers [1138248] Funding Source: National Science Foundation
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Optical and thermal activity of plasmon-active nanoparticles in transparent dielectric media is of growing interest in thermal therapies, photovoltaics and optoelectronic components in which localized surface plasmon resonance (LSPR) could play a significant role. This work compares a new method to embed gold nanoparticles (AuNPs) in dense, composite films with an extension of a previously introduced method. Microscopic and spectroscopic properties of the two films are related to thermal behavior induced via laser excitation of LSPR at 532 nm in the optically transparent dielectric. Gold nanoparticles were incorporated into effectively nonporous 680 mu m thick polydimethylsiloxane (PDMS) films by (1) direct addition of organic-coated 16 nm nanoparticles; and (2) reduction of hydrogen tetrachloroaurate (TCA) into AuNPs. Power loss at LSPR excitation frequency and steady-state temperature maxima at 100 mW continuous laser irradiation showed corresponding increases with respect to the mass of gold introduced into the PDMS films by either method. Measured rates of temperature increase were higher for organic-coated NP, but higher gold content was achieved by reducing TCA, which resulted in larger overall temperature changes in reduced AuNP films.
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