Morphological characterization of pentacene single crystals grown by physical vapor transport
- 作者：Xionghui Zeng ; Yong Qiu ; Juan Qiao ; Guifang Dong ; Liduo Wang
- 关键词：Pentacene ; Single crystal ; Morphology ; Physical vapor transport ; Growth mechanism
- 刊名：Applied Surface Science
- 出版年：2007
- 期刊代码：6_01694332
- 类别：ms
- 出版时间：30 January 2007
- 卷：253
- 期：7
- 页码：3581-3585
- 文件大小：624 K
摘要
Pentacene single crystals were grown by physical vapor growth. It was found that large-sized pentacene single crystals can be grown under 1 atm argon either in a closed tube or in an opened tube. The morphology of surface and transect of pentacene crystals was characterized by optical microscope, atomic force microscope and scanning electron microscope. Pentacene monolayers and layer-like structures are observed on the surface and in the interior of single crystals, respectively. The array of large straight steps is also observed on the surface of pentacene single crystals. All results indicate that the growth mechanism of pentacene single crystals is a two-dimensional nucleation–elementary steps–large straight steps–layer-by-layer periods growth.