Simple and rapid method for homogeneous dimer formation of gold nanoparticles in a bulk suspension based on van der Waals interactions between alkyl chains

Keiko Esashika, Ryo Ishii, Shunya Tokihiro, Toshiharu Saiki

    研究成果: Article

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    We developed a simple and rapid method for dimer and higher multimer formation of gold nanoparticles (AuNPs) in bulk suspension. A coupling of AuNPs modified with COOH-terminated alkanethiol by van-der-Waals interaction between alkyl chains was employed. We demonstrated the tunability of the interparticle gap by changing the alkyl chain length from C5 to C15. Efficient dimer formation that avoids unwanted aggregation was demonstrated for AuNPs with a diameter ranging from 20 nm to 80 nm. For all cases, we found that the interparticle gap is well-defined and uniform. For the shortest alkyl chain (C5), we achieved an interparticle gap as small as 1.0 nm.

    元の言語English
    記事番号356279
    ジャーナルOptical Materials Express
    9
    発行部数4
    DOI
    出版物ステータスPublished - 2019 4 1

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials

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