Effects of Al2O3 buffer layer and water vapor on growth of highly vertically aligned carbon nanotube forests on stainless steel
Date Issued
2010
Date
2010
Author(s)
Chen, Hsien-Jen
Abstract
Carbon nanotubes (CNTs) are widely studied and are starting to be used for electrode and sensor applications. In such cases, a conducting substrate is most often required. Particularly, stainless steel (SS) seems an attractive candidate for CNT growth due to its high iron content and the possibility to tailor active sites for the growth process. A direct growth of the CNT on the bulk metal substrate should enhance the adherence of the tube to the electrodes and favor a better electron/thermal transfer.
A facile and robust method to grow CNT forests directly on SS substrates will be important. Methods to grow CNT forests directly on metal substrates have been explored previously, but these entailed certain limitations or complicated processes. Therefore, it will be critical to develop a facile method for growing vertically-aligned CNT forests of high quality directly on SS substrates. In this research, we demonstrate that CNT forests can be successfully synthesized on SS 304 by a simple water-assisted CVD with Al2O3 buffer layer as pattern. In addition, we demonstrate that iron-filled CNT forests can be successfully synthesized on SS 304 by adding ferrocene, which serves as carbon source, catalyst, and iron-filled material.
Subjects
stainless steel
water-assisted
iron-filled CNT forest
Al2O3 buffer layer
ferrocene
Type
thesis
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