Laterally enhanced growth of electrodeposited Au to form ultrathin films on nonconductive surfaces

Chiaki Kobayashi, Mikiko Saito, Takayuki Homma*

*この研究の対応する著者

研究成果: Article査読

6 被引用数 (Scopus)

抄録

We investigated the laterally enhanced growth of electrodeposited Au for fabricating nanogap electrodes. To enhance the lateral growth, we carried out electrodeposition over patterned electrodes onto a SiO 2 surface modified with self-assembled monolayers (SAMs) or dendrimers with amine groups. The morphology and thickness of the Au films were controlled by adjusting deposition conditions such as duration, applied potential, and Au ion concentration in the bath. To investigate the mechanism of the laterally enhanced growth, the surface states of SAM- or dendrimer-modified SiO 2 were analyzed by X-ray photoelectron spectroscopy (XPS). The XPS results indicate the existence of organic molecules and Au ions on the SiO 2 surface, which suggests that laterally enhanced growth is induced by the Au ions coordinated on the amine groups of the organic molecules. To further analyze the mechanism of the laterally enhanced growth, we investigated the relationship between the morphology of the laterally enhanced growth of Au and the amount of Au ions on organic molecules. The laterally enhanced growth of Au is expected to be useful for fabricating thin film nanogap electrodes.

本文言語English
ページ(範囲)235-243
ページ数9
ジャーナルElectrochimica Acta
74
DOI
出版ステータスPublished - 2012 7月 15

ASJC Scopus subject areas

  • 化学工学(全般)
  • 電気化学

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