Thickness-driven orthorhombic to triclinic phase transformation in pentacene thin films

被引：132
作者：
Drummy, LF
Martin, DC
机构：
[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Macromol Sci & Engn, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Dept Biomed Engn, Ann Arbor, MI 48109 USA
[4] USAF, Res Labs, Wright Patterson AFB, OH 45433 USA
来源：
ADVANCED MATERIALS | 2005年 / 17卷 / 07期
关键词：
D O I：
10.1002/adma.200400189
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Pentacene films are thermally evaporated onto amorphous carbon-coated mica substrates held at room temperature. The crystal structure and morphology of the films are analyzed using electron microscopy and diffraction, and a new orthorhombic structure is characterized for films below a critical thickness (see Figure). Evidence that the orthorhombic structure is thermodynamically stable at low film thickness due to its low (001) surface energy is obtained.
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页码：903 / +
页数：6
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