Mechanism of pattern formation in carbon nanotube array:temperature effect

• Main Authors: Wei-ting Li, 黎威廷
• Other Authors: Chien-chung Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/60971562050376780844

碩士 === 國立中正大學 === 化學工程所 === 98 === In this study, we demonstrate the mechanism of pattern formation and Cell size estimation on nanocarpet, and also investigate the pattern structures which affect by several factors, including quantity of solvent, diffusion and temperature. Nanocarpet was formed by ACNT after wetting-dewetting treatment.Thegrowth rate of Cell decreasing from beginning to the end, which can be separated by three stages, including; Rapid stage, creeping stage and fully-developed stage, we also explain the mechanism of pattern formation through out the Cell growth rate and the interaction between ACNT. In second part, we found the pattern structure will affect by the quantity of solvent.The random structure can caused by great deal amount of solvent,and the concentric structure can be created by spreading solvent on ACNT, which amount was extremely low (2μl); we also found the trench-like nano carpet by side wetting. The different structures of nanocarpet can be traced to the behavior of solvent diffusion. In the other hand, we found the Cell size and its structure will affected by vapor pressure of the solvent and length of the ACNT. Finally, we use a simple model to estimate the Cell size of nanocarpet, the difference between the theoretical value and our result or others study were range from 4~23%.