Functional controlled release systems triggered by photothermal effect of gold nanorods

Shuji Yamashita, Hiromitsu Fukushima, Yasuro Niidome, Takeshi Mori, Yoshiki Katayama, Takuro Niidome

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Gold nanorods, rod-shaped gold nanoparticles, have transverse and longitudinal surface plasmon (SP) bands at visible and near-infrared (IR) regions, respectively. Since the absorbed light energy is converted into heat, photothermal effect of gold nanorods can be triggered without damaging the tissues in the path of near-IR laser light. In this study, we tried to construct controlled release system of functional molecules from surface of gold nanorods mediated by the photothermal effect. First, we evaluated controlled release of poly(ethyleneglycol) (PEG) chains from PEG-modified gold nanorods (PEG-NR). Next, we employed double stranded oligonucleotide as a thermo-responsive dissociating group (DNA-NR). Finally, we evaluated photothermal release of PEG chains mediated retro-Diels-Alder reaction (PEG-DA-NR). For construction of controlled release system of functional molecules, these studies will provide important information about the photothermal reactions of surface molecules on the gold nanorods triggered by near-IR light irradiation.

    Original languageEnglish
    Title of host publicationBiological Imaging and Sensing Using Nanoparticle Assemblies
    Number of pages6
    Publication statusPublished - 2010
    Event2009 MRS Fall Meeting - Boston, MA, United States
    Duration: Nov 30 2009Dec 4 2009

    Publication series

    NameMaterials Research Society Symposium Proceedings
    ISSN (Print)0272-9172


    Other2009 MRS Fall Meeting
    Country/TerritoryUnited States
    CityBoston, MA

    All Science Journal Classification (ASJC) codes

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


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