PH-dependent network formation of quantum dots and fluorescent quenching by Au nanoparticle embedding

Shota Sekiguchi, Kenichi Niikura, Naoki Iyo, Yasutaka Matsuo, Asumi Eguchi, Takakazu Nakabayashi, Nobuhiro Ohta, Kuniharu Ijiro

研究成果: Article査読

18 被引用数 (Scopus)

抄録

A simple approach to the creation of colloidal assemblies is in high demand for the development of functional devices. Here, we present the preparation of CdTe-QD (quantum dot) networks in as little as 1 day simply by pH modification without the use of oxidants. The QD network was tractable in water and casting from a droplet produced a porous networked film on both hydrophobic and hydrophilic solid substrates. Further, we found that citrate-protected gold nanoparticles (AuNPs, d = 5 nm) could be incorporated into the QD networks to afford a QD/Au composite network, and that the fluorescence from the QDs was largely decreased by the addition of a small proportion of AuNPs (QD:AuNP = 99.4:0.6), probably due to the efficient charge transfer through the network. These data indicate that our method is suitable for application to the creation of metal/QD hybrid materials that can be integrated into wet-based processes.

本文言語English
ページ(範囲)4169-4173
ページ数5
ジャーナルACS Applied Materials and Interfaces
3
11
DOI
出版ステータスPublished - 2011 11 23
外部発表はい

ASJC Scopus subject areas

  • Materials Science(all)

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