Effects of capping thiols on the laser-induced fusion of gold nanoparticles and deposition onto glass substrates in cyclohexane

Hironobu Takahashi, Yasuro Niidome, Takuro Sato, Sunao Yamada

    研究成果: Contribution to journalArticle査読

    15 被引用数 (Scopus)

    抄録

    On irradiation with pulsed 532-nm laser light, dodecanethiol (DT)-capped gold nanoparticles (DT-Au) aggregate and fuse in organic solvents. As a result of particle destabilization, the particles are deposited onto a glass substrate immersed in a colloidal cyclohexane solution. Generally, the properties of gold nanoparticles depend strongly on the surface conditions of the particles. In this report, small amounts of immobilized DT molecules were replaced with 1,6-hexanedithiol (HD) molecules, giving gold nanoparticles capped with DT and HD, denoted as (DT + HD)-Au. The amount of HD in (DT + HD)-Au was determined to be ∼6% by elemental analysis. Interestingly, the absorption spectra of DT-Au and (DT + HD)-Au indicated that both particles have similar stabilities in colloidal solution. Despite this, the activities of these gold nanoparticles after laser irradiation differed dramatically. When (DT + HD)-Au was used instead of DT-Au, the degree of growth and deposition of gold nanoparticles was accelerated and the deposited particles were huge, reaching sizes of several hundreds of nanometers.

    本文言語英語
    ページ(範囲)105-113
    ページ数9
    ジャーナルColloids and Surfaces A: Physicochemical and Engineering Aspects
    247
    1-3
    DOI
    出版ステータス出版済み - 10 21 2004

    All Science Journal Classification (ASJC) codes

    • 表面および界面
    • 物理化学および理論化学
    • コロイド化学および表面化学

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