Doping strategy of carbon nanotubes with redox chemistry
Doping strategy of carbon nanotubes with redox chemistry
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DOI：
10.1039/c0nj00138d
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发表时间：
2010-01-01
影响因子：
3.3
通讯作者：
Lee, Young Hee
中科院分区：
文献类型：
--
作者：
Kim, Ki Kang;Yoon, Seon-Mi;Lee, Young Hee
单壁碳纳米管（SWCNTs）的化学掺杂一直是调整SWCNTs电子结构的一个重要问题。本文提出了一种通过选择掺杂剂的还原电位相对于单壁碳纳米管的氧化还原电位来控制掺杂类型和掺杂浓度的策略。为了这个目的，氧化还原电位图的手性和直径的基础上产生的理论计算，这是在良好的协议与实验数据从单独分离的单壁碳纳米管。通过吸收光谱和拉曼光谱可以清楚地观察到具有各种掺杂剂的单壁碳纳米管的电子结构的变化，并通过氧化还原电位参数很好地解释了这种变化。通过制备透明导电膜，然后掺杂，进一步测试了这一原理。用Au 3+掺杂导致在90%透射率下100 Ω sq（-1）的薄层电阻。这种用于n型和p型材料的SWCNT掺杂策略可以推广到广泛的纳米结构，例如纳米线和纳米颗粒。
The chemical doping of single-walled carbon nanotubes (SWCNTs) has been an important issue in tailoring the electronic structures of SWCNTs. This paper proposes a strategy for controlling the doping types and doping concentrations by choosing the reduction potential of a dopant relative to the redox potential of SWCNTs. For this purpose, the redox potential plot in terms of the chirality and diameter was generated based on theoretical calculations, which were in good agreement with the experimental data obtained from individually separated SWCNTs. The change in the electronic structures of the SWCNTs with the various dopants was clearly observed by absorption and Raman spectroscopy, and was explained well by the redox potential argument. This principle was tested further by fabricating transparent conducting films followed by doping. Doping with Au3+ resulted in a sheet resistance of 100 Omega sq(-1) at 90% transmittance. This SWCNT doping strategy for both n-type and p-type materials can be generalized to a wide range of nanostructures, such as nanowires and nanoparticles.