Thermally enhanced single-walled carbon nanotube microfluidic alignment |
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| Authors: | Zhijiang Ye Dongjin Lee Stephen A. CampbellTianhong Cui |
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| Affiliation: | a Department of Mechanical Engineering, University of Minnesota, 111 Church Street S.E., Minneapolis, MN 55455, USA
b Department of Electrical and Computer Engineering, University of Minnesota, 200 Union Street S.E., Minneapolis, MN 55455, USA |
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| Abstract: | We present thermally enhanced single-walled carbon nanotube (SWCNT) horizontal alignment on a wafer scale level that enhances the device performance with a possibility of mass production. The SWCNT dispersion is evaporated on the heated and tilted open microfluidic channel template of photoresist. Scanning electron microscopy demonstrates well-aligned SWCNTs qualitatively and G-band to D-band (G/D) ratio in Raman spectra indicates the degree of alignment quantitatively. The effect of temperature, fluidic channel dimension, concentration of SWCNT dispersion and wetting properties on the alignment is investigated, resulting in G/D ratio of up to 30. |
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| Keywords: | Carbon nanotubes Nanotube alignment Raman spectroscopy Microfluidic channel |
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