Aqueous Solution Structure over α-Al2O3(012) Probed by Frequency-Modulation Atomic Force Microscopy

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• 作者：Takumi Hiasa ; Kenjiro Kimura ; Hiroshi Onishi ; Masahiro Ohta ; Kazuyuki Watanabe ; Ryohei Kokawa ; Noriaki Oyabu ; Kei Kobayashi ; Hirofumi Yamada
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：December 16, 2010
• 年：2010
• 卷：114
• 期：49
• 页码：21423-21426
• 全文大小：172K
• 年卷期：v.114,no.49(December 16, 2010)
• ISSN：1932-7455

文摘

An α-Al₂O₃(012) wafer was immersed in an aqueous KCl solution of 1 mol L⁻¹ and observed with a frequency-modulation atomic force microscope. The tip−surface force was precisely determined as a function of the tip−surface distance. The force−distance relationship contained oscillations accompanied with an exponentially decayed, electric double layer force. The force oscillations were ascribed to liquid water layers confined over the Al₂O₃ surface.