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Unique photothermal response and sustained photothermal effect of pH-responsive gold-nanoparticle aggregates
Jutaek Nam1, Hyoseok Nam, Sungwook Jung
1Department of Chemistry, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790-784, South Korea.
Abstract:
Hot gold: The photothermal response upon pulsed laser irradiation is studied for pH-responsive gold-nanoparticle aggregates and compared to that of gold nanorods. The aggregates show a slight red shift in the absorption spectrum and retain the photothermal effect, whereas the nanorods lose the photothermal effect and exhibit a stark blue shift in the absorption.
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