Spatial temperature mapping within polymer nanocomposites undergoing ultrafast photothermal heating via gold nanorods.

ABSTRACT: Heat emanates from gold nanorods (GNRs) under ultrafast optical excitation of the localized surface plasmon resonance. The steady state nanoscale temperature distribution formed within a polymer matrix embedded with GNRs undergoing pulsed femtosecond photothermal heating is determined experimentally using two independent ensemble optical techniques. Physical rotation of the nanorods reveals the average local temperature of the polymer melt in the immediate spatial volume surrounding each rod while fluorescence of homogeneously-distributed perylene molecules monitors temperature over sample regions at larger distances from the GNRs. Polarization-sensitive fluorescence measurements of the perylene probes provide an estimate of the average size of the quasi-molten region surrounding each nano

SUBMITTER: Maity S 

PROVIDER: S-EPMC4488066 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature