期刊
CARBON
卷 93, 期 -, 页码 574-594出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.05.036
关键词
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资金
- Royal Society Wolfson Research Merit Award
- European Research Council
- EU [604391]
- EPSRC [EP/F048068/1, EP/K01711X/1, EP/K017144/1, EP/L016087/1]
- Newton International Fellowship
- Government of Malaysia
- Universiti Kebangsaan Malaysia [GGPM-2013-073]
- EPSRC (UK)
- Engineering and Physical Sciences Research Council [EP/F048068/1, EP/K01711X/1, EP/K017144/1, EP/F052901/1] Funding Source: researchfish
- EPSRC [EP/K017144/1, EP/F048068/1, EP/K01711X/1, EP/F052901/1] Funding Source: UKRI
Post-synthesis separation of metallic (m-SWNTs) and semiconducting (s-SWNTs) single-wall carbon nanotubes (SWNTs) remains a challenging process. Gel agarose chromatography is emerging as an efficient and large scale separation technique. However, the full (100%) separation has not been achieved yet, mainly due to the lack of understanding of the underlying mechanism. Here, we study the temperature effect on the SWNTs separation via gel agarose chromatography, for four different SWNT sources. Exploiting a gel agarose micro-beads filtration technique we achieve up to 70% m-SWNTs and over 90% s-SWNTs, independent of the source material. The process is temperature dependent, with yields up to 95% for s-SWNT (HiPco) at 6 degrees C. Temperature affects the sodium dodecyl sulfate surfactant-micelle distribution along the SWNT sidewalls, thus determining the effectiveness of the SWNTs sorting by electronic type. The sorted SWNTs are then used to fabricate transistors with very low OFF-currents (similar to 10(-13) A), high ON/OFF current ratio (>10(6)) and charge carriers mobility similar to 40 cm(2) V-1 s(-1). (C) 2015 Elsevier Ltd. All rights reserved.
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