Sorting Semiconducting Single‐Walled Carbon Nanotubes by Water‐Soluble Polyfluorene Assisted Electrophoresis and Its Application in Field‐effect Transistors |
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Authors: | Haoyun Zhu Weizhi Wang |
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Institution: | State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China |
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Abstract: | We report a considerably promising method based on agarose gel electrophoresis (AGE) to separate single‐walled carbon nanotubes by adding a water‐soluble polyfluorene (w‐PFO) as surfactant into the agarose gel. In this effective method, the AGE/w‐PFO gel network will trap more semiconducting single‐walled carbon nanotubes (SWNTs) with the assistance of w‐PFO, for the strong interaction between w‐PFO and semiconducting species. The optical absorbance, photoluminescence emission and resonant Raman scattering characterization were used to verify the separation effect. The purity of separated semiconducting species is as high as (98±1)%. The demonstrated field effect transistors give the on/off ratio and mobility about 27000 and 10.2 cm2·V?1·s?1, respectively. |
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Keywords: | agarose gel electrophoresis field effect transistors semiconducting single‐walled carbon nanotubes water‐soluble polyfluorene |
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