Growth of a Two-Dimensional Nucleus on a Cleaved (010) Surface of (NH<sub><b>2</b></sub>CH<sub><b>2</b></sub>COOH)<sub><b>3</b></sub>·H<sub><b>2</b></sub>SO<sub><b>4</b></sub>

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  • Ohgami Junji
    Department of Physics, Faculty of Science, Hiroshima University, Higashi–Hiroshima 739
  • Sugawara Yasuhiro
    Department of Electronic Engineering, Faculty of Engineering, Osaka University, Suita 565
  • Morita Seizo
    Department of Electronic Engineering, Faculty of Engineering, Osaka University, Suita 565
  • Ozaki Toru
    Department of Materials Science, Faculty of Science, Hiroshima University, Higashi–Hiroshima 739

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  • Growth of a Two-Dimensional Nucleus on a Cleaved (010) Surface of (NH2CH2COOH)3 H2SO4.
  • Growth of a Two-Dimensional Nucleus on

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On a cleaved (010) surface of ferroelectric (NH2CH2COOH)3· H2SO4 (TGS), time evolution of round islands with height corresponding to one chemical unit of TGS has been investigated using an atomic force microscope (AFM) in air at room temperature. The time evolution of the round islands at the measured humidity was characterized by a critical radius rc of the island as follows. In case of an island with a radius r<rc, the radius decreased and the island disappeared. On the other hand, in case of r>rc, the radius increased or was almost unchanged. The critical radius rc increased with an increase of the relative humidity. The relative humidity is associated with adsorbed water. These results are discussed with respect to a basic theory of growth of a two-dimensional nucleus in supersaturated aqueous solution.

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