Competitive Attachment of Gold Nanoparticles on an Indium Tin Oxide Electrode

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Author(s)

Abstract

Fundamental aspects of the attachment of gold nanoparticles (AuNPs) onto a 3-aminopropyltrimethoxysilane (APTMS) modified indium tin oxide (ITO) electrode were explored using commercially available Au colloid solutions of 5, 10 and 20 nm. In particular, competitive attachments of AuNPs were observed using mixed solutions of two Au colloids. Consequently, it was found that smaller AuNPs are easily attached on an APTMS modified ITO. On the other hand, the result of the stepwise attachments showed that after the surface was modified by the first AuNPs, the second AuNPs have difficulty attaching. This means, if surface connecting −NH<sub>2</sub> terminals of APTMS are once occupied, further modification or exchange of the attached AuNPs would not be easy. From the present results, a contaminant amount of smaller AuNPs is considered to be a practical problem in modifying ITO surfaces by AuNPs.

Journal

  • Analytical Sciences

    Analytical Sciences 31(7), 597-602, 2015

    Japan Society for Analytical Chemistry

Codes

  • NII Article ID (NAID)
    130005087175
  • NII NACSIS-CAT ID (NCID)
    AA10500785
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    0910-6340
  • NDL Article ID
    026581552
  • NDL Call No.
    Z54-F482
  • Data Source
    NDL  IR  J-STAGE 
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