Abstract
On a cleaved (010) surface of ferroelectric (NH 2 CH 2 COOH) 3 ·H 2 SO 4 (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 r c of the island as follows. In case of an island with a radius r r c , the radius increased or was almost unchanged. The critical radius r c 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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