直鎖状分子性物質の蒸着膜表面における結晶成長のステップ・モルホロジー

概要

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The surface morphologies of vacuum-deposited stearic acid films have been observed by replica electron microscopy. The crystal structure examined was monoclinic. Lateral and adhesive growth modes were observed under the following conditions; the deposition rate : 45 nm/min and 1.8 nm/min, the substrate temperature : -50°C, -20°C and 25°C, and the film thickness : about 320 nm. Spiral growth steps and closed loops revealed on the surfaces grown with the lateral growth mode. A “fan-shaped growth hillock” showed the most peculiar step morphology, which consists of a circular step segment with one side and of a trancated polygonal one with the other side along the symmetric a-axis. These fan-shaped growth hillocks were observed only on the vapor-grown surfaces.
日本真空協会の論文