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Single-walled carbon nanotubes (SWCNTs) are very important especially in electronics miniaturization due to their excellent electric properties different from the multi-walled carbon nanotubes (MWCNTs) variants. CNT can be synthesized via many techniques including arc discharge, laser ablation, and chemical vapor deposition (CVD). Among the various methods, CVD shows to be the most promising method for industrial-scale deposition, because of its price-per-unit ratio and it is capable of growing nanotubes directly on a desired substrate. However, the growth sites must be controlled by a careful deposition of the catalyst involved. In this article, we report a simple novel method to generate the catalyst pattern for growing high quality SWCNTs with very low cost, opening up another possibility to commercial scale applications of SWCNTs.
June 27th, 2009
Almost No Cost Generation of Catalyst Patterns for Growth of Large-Scale Densely Aligned SWCNTs
A research group at the School of Materials Science & Engineering, Nanyang Technological University (NTU), Singapore, led by Assistant Prof. Hua Zhang has come up with an extremely simple, fast, almost no cost and environmentally friendly technique called "Needle-Scratching" Method (NSM) to generate catalyst patterns used for growing large-scale densely aligned single-walled carbon nanotubes (SWCNTs) arrays as recently published online in Small, http://dx.doi.org/10.1002/smll.200900654 .
|An SEM image of densely aligned SWCNT arrays grown from the NSM-generated catalyst stripe on quartz substrate (source: Asst/P Hua Zhang, MSE-NTU)|