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Spontaneous Formation of Air Nanobubbles on Hydrocarbons Deposited on the Au(111)/Water Interface

Author

Listed:
  • Ichiro Otsuka

    (Department of Chemistry, Ohu University, Misumido 31-1, Tomita-cho, Koriyama, 963-8611, Japan)

  • Masashi Yaoita

    (Department of Chemistry, Ohu University, Misumido 31-1, Tomita-cho, Koriyama, 963-8611, Japan;
    Department of Bioscience, Teikyo University of Science &; Technology, Yamanashi, Japan)

  • Michi Higano

    (Department of Chemistry, Ohu University, Misumido 31-1, Tomita-cho, Koriyama, 963-8611, Japan;
    Toyo Corporation, Tokyo, Japan)

  • Seiichi Nagashima

    (Department of Chemistry, Ohu University, Misumido 31-1, Tomita-cho, Koriyama, 963-8611, Japan;
    College of Engineering, Nihon University, Koriyama, Japan)

Abstract

We have observed surface features on hydrocarbons deposited on Au(111) from the laboratory atmosphere in water and in a sodium chloride aqueous solution, using tapping mode atomic force microscopy (TMAFM). TMAFM images of the Au(111)/water interface reveal that the features are pancake-shaped structures with the range of measured dimensions of 20–150 nm in width and 0.5–20 nm in height, and that many features reappear at almost the same sites immediately after the disruption of the features by contact mode AFM imaging. The results of our TMAFM observations imply that the features are nanosized bubbles as those reported previously, and that dissolved gas nucleates at specific sites of the hydrophobized Au(111) surface at low, temporal gas supersaturations under atmospheric pressure.

Suggested Citation

  • Ichiro Otsuka & Masashi Yaoita & Michi Higano & Seiichi Nagashima, 2003. "Spontaneous Formation of Air Nanobubbles on Hydrocarbons Deposited on the Au(111)/Water Interface," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 10(02n03), pages 337-343.
    • Handle: RePEc:wsi:srlxxx:v:10:y:2003:i:02n03:n:s0218625x03004895
    DOI: 10.1142/S0218625X03004895
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