Dry densification of carbon nanotube bundles

被引：41
|
作者：
Wang, Teng [1 ]
Jeppson, Kjell [1 ]
Liu, Johan [1 ,2 ,3 ,4 ]
机构：
[1] Chalmers Univ Technol, Dept Microtechnol & Nanosci MC2, SE-41296 Gothenburg, Sweden
[2] Shanghai Univ, Key Lab New Displays & Syst Applicat, Shanghai 200072, Peoples R China
[3] Shanghai Univ, SMIT Ctr, Sch Mech Engn & Automat, Shanghai 200072, Peoples R China
[4] SHT Smart HighTech AB, SE-41296 Gothenburg, Sweden
来源：
CARBON | 2010年 / 48卷 / 13期
基金：
美国国家科学基金会;
关键词：
FABRICATION; GROWTH; DENSE;
D O I：
10.1016/j.carbon.2010.06.042
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A dry method for densifying vertically aligned carbon nanotube bundles is proposed and experimentally validated. The process uses the deposition of thin SiO2 films to seal the porous CNT bundles at low pressure. When the CNT bundles are transferred back to ambient pressure they are densified by the pressure difference obtained between the inner and outer sides of the thin film. The effects of the densification have been studied for different thicknesses of SiO2 films deposited by two different deposition techniques. The diameters of the narrowest densified sections are 26 +/- 3% of their original sizes after dry densification by 50 nm thick SiO2. The proposed dry densification method is also compared to existing liquid-based methods and its limitations are discussed. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3795 / 3801
页数：7
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