Diameter dependent doping in horizontally aligned high-density N-doped SWNT arrays


We reported the growth of horizontally aligned nitrogen-doped single-walled carbon nanotubes (SWNTs) on quartz substrates. The synthesized SWNTs were comprehensively characterized at the single nanotube level. Owing to the highly aligned nature of the nanotubes, we were able to investigate the diameter dependent doping mechanism through systematic resonant Raman spectroscopy studies. Other than the formerly found narrowing effect by N-doping, we proposed that the nanotube diameter affects the introduction of N atoms into the carbon lattice in an elaborate way. The obtained doping level increased along with the nanotube diameter but lost the increasing trend when the diameter became larger and experienced a slight decrease after reaching the local peak value. These insights about the heteroatom doping into the carbon nanotubes could benefit the development of the carbon nanotube based functional materials and extend their application in a broad range of areas.

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This work is jointly supported by the National Natural Science Foundation of China (Nos. 51802161, 51772157, and 61504062), Natural Science Foundation of Jiangsu Province (No. BK20160886), Priority Academic Program Development of Jiangsu Higher Education Institutions (No. YX03001), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Synergistic Innovation Center for Organic Electronics and Information Displays, Jiangsu Province “Six Talent Peak” (No. 2014-XCL-014), Qing Lan Project of Jiangsu Province, Jiangsu Higher Education Institutions NSF (No. 17KJB430026), Scientific Research Foundation of NUPT (No. NY217012), Graduate Education Innovation Project in Jiangsu Province (No. CXZZ12_0461) and Keypoint Research and Invention Program of Jiangsu Province (No. BE2018010-3).

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Correspondence to Yanwen Ma or Jie Liu.

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Li, P., Li, Y., Zhang, X. et al. Diameter dependent doping in horizontally aligned high-density N-doped SWNT arrays. Nano Res. 12, 1845–1850 (2019). https://doi.org/10.1007/s12274-019-2445-1

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  • single-walled carbon nanotube (SWNT) array
  • chemical vapor deposition (CVD)
  • N-doping
  • diameter dependent doping
  • Raman spectroscopy