Negative Thermal Expansion in Discotic Liquid Crystals of Nanographenes

被引：43
|
作者：
Grigoriadis, C. [1 ,2 ]
Haase, N. [3 ]
Butt, H. -J. [3 ]
Muellen, K. [3 ]
Floudas, G. [1 ,2 ]
机构：
[1] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece
[2] Fdn Res & Technol Hellas FORTH, Biomed Res Inst, Ioannina, Greece
[3] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
来源：
ADVANCED MATERIALS | 2010年 / 22卷 / 12期
关键词：
GLASS-TRANSITION; GRAPHENES; PHASE;
D O I：
10.1002/adma.200903264
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Hexa-peri-hexabenzocoronene derivatives show a record high negative volumetric thermal expansion coefficient within the crystalline phase. Responsible for the negative thermal expansion is the increase of the tilt angle and the improved packing of the discotic cores with temperature and this has implications in the design of organic electronic devices as well as in advanced nanocomposites with controlled thermal properties.
引用
收藏
页码：1403 / +
页数：5
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