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Unique Photothermal Response and Sustained Photothermal Effect of pH-Responsive Gold-Nanoparticle Aggregates

Authors

  • Dr. Jutaek Nam,

    1. Department of Chemistry, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea), Fax: (+82) 054-279-1498
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  • Hyoseok Nam,

    1. Department of Mechanical Engineering, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea)
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  • Sungwook Jung,

    1. School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea)
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  • Sekyu Hwang,

    1. Department of Chemistry, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea), Fax: (+82) 054-279-1498
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  • Taejun Wang,

    1. Department of Integrative Biosciences and Biotechnology, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea)
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  • Dr. Jaehyun Hur,

    1. Frontier Research Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics, Yongin, Kyunggi-do 446-712 (South Korea)
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  • Dr. Kyuhyun Im,

    1. Frontier Research Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics, Yongin, Kyunggi-do 446-712 (South Korea)
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  • Dr. Nokyoung Park,

    1. Frontier Research Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics, Yongin, Kyunggi-do 446-712 (South Korea)
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  • Prof. Ki Hean Kim,

    1. Department of Mechanical Engineering, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea)
    2. Department of Integrative Biosciences and Biotechnology, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea)
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  • Prof. Sungjee Kim

    Corresponding author
    1. Department of Chemistry, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea), Fax: (+82) 054-279-1498
    2. School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea)
    • Department of Chemistry, Pohang University of Science & Technology (POSTECH), San 31, Hyojadong, Namgu, Pohang 790–784 (South Korea), Fax: (+82) 054-279-1498
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  • A Comparative Study with Gold Nanorods

Abstract

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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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