Wide Range Control of Microstructure and Mechanical Properties of Carbon   Nanotube Forests: A Comparison Between Fixed and Floating Catalyst CVD   Techniques

doi:10.1002/adfm.201200852

CORC > 北京大学 > 工学院

	Wide Range Control of Microstructure and Mechanical Properties of Carbon Nanotube Forests: A Comparison Between Fixed and Floating Catalyst CVD Techniques
	Yaglioglu, Onnik ; Cao, Anyuan ; Hart, A. John ; Martens, Rod ; Slocum, A. H.
刊名	先进功能材料
	2012
关键词	CHEMICAL-VAPOR-DEPOSITION GROWTH HYDROGEN ARRAYS WALL COMPRESSION NUCLEATION MORPHOLOGY DIAMETER DENSITY
DOI	10.1002/adfm.201200852
英文摘要	Vertically aligned carbon nanotube (CNT) forests may be used as miniature springs, compliant thermal interfaces, and shock absorbers, and for these and other applications it is vital to understand how to engineer their mechanical properties. Herein is investigated how the diameter and packing density within CNT forests govern their deformation behavior, structural stiffness, and elastic energy absorption properties. The mechanical behavior of low-density CNT forests grown by fixed catalyst CVD methods and high-density CNT forests grown by a floating catalyst CVD method are studied by in situ SEM compression testing and tribometer measurements of force-displacement relationships. Low-density and small-diameter CNT columns (fixed catalyst) exhibit large plastic deformation and can be pre-deformed to act as springs within a specified elastic range, whereas high-density and large-diameter CNT columns (floating catalyst) exhibit significant elastic recovery after deformation. In this work the energy absorption capacity of CNT forests is tuned over three orders of magnitude and it is shown that CNT forest density can be tuned over a range of conventional foam materials, but corresponding stiffness is similar to 10x higher. It is proposed that the elastic behavior of CNT forests is analogous to open-cell foams and a simple model is presented. It is also shown that this model can be useful as a first-order design tool to establish design guidelines for the mechanical properties of CNT forests and selection of the appropriate synthesis method.; Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter; SCI(E); EI; 15; ARTICLE; 23; 5028-5037; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/228574]
专题	工学院
推荐引用方式 GB/T 7714	Yaglioglu, Onnik,Cao, Anyuan,Hart, A. John,et al. Wide Range Control of Microstructure and Mechanical Properties of Carbon Nanotube Forests: A Comparison Between Fixed and Floating Catalyst CVD Techniques[J]. 先进功能材料,2012.
APA	Yaglioglu, Onnik,Cao, Anyuan,Hart, A. John,Martens, Rod,&Slocum, A. H..(2012).Wide Range Control of Microstructure and Mechanical Properties of Carbon Nanotube Forests: A Comparison Between Fixed and Floating Catalyst CVD Techniques.先进功能材料.
MLA	Yaglioglu, Onnik,et al."Wide Range Control of Microstructure and Mechanical Properties of Carbon Nanotube Forests: A Comparison Between Fixed and Floating Catalyst CVD Techniques".先进功能材料 (2012).