@article{oai:sucra.repo.nii.ac.jp:00013213, author = {Yamamoto, Y and Ichikawa, Hisashi and 上野, 啓司 and 小間, 篤 and Saiki, Koichiro and Shimada, T}, issue = {15}, journal = {PHYSICAL REVIEW B}, month = {}, note = {Thin films of C-60 were grown under laser irradiation at various intensities 0-200 mW/mm(2) and their growth shapes were investigated by ex situ atomic force microscopy (AFM) observation. The nucleation density of the first layer decreases with increasing laser intensity, probably due to the temperature rise of the migrating clusters. In addition to this gradual laser intensity dependence, an anomalous enhancement of the nucleation density was observed on irradiation at 50 mW/mm(2), which was attributed to the influence of photopolymerization. As for the second layer, there was a threshold laser intensity (200 mW/mm(2)) at which the nucleation density increased and the shape of the domains became irregular. This is due to the combined effect of hindered migration caused by the polymerized first layer and photopolymerization of the migrating molecules themselves. Energy transfer from the excited substrate to the migrating C-60 molecules is strongly suggested., Copyright notice(c)2004 American Physical Society. All rights reserved. Publisher's version: http://link.aps.org/abstract/PRB/v70/e155415, text, application/pdf}, pages = {155415-1--155415-6}, title = {Morphological change of C-60 monolayer epitaxial films under photoexcitation}, volume = {70}, year = {2004}, yomi = {ウエノ, ケイジ and コマ, アツシ} }