Nanoparticle-Assisted Alignment of Carbon Nanotubes on DNA Origami
Nanoparticle-Assisted Alignment of Carbon Nanotubes on DNA Origami
复制标题
纳米颗粒辅助碳纳米管在 DNA 折纸上的排列
DOI：
10.1002/anie.201916043
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Zuo Xiaolei
中科院分区：
文献类型：
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作者：
Zhang Yueyue;Mao Xiuhai;Li Fan;Li Min;Jing Xinxin;Ge Zhilei;Wang Lihua;Liu Kai;Zhang Hongjie;Fan Chunhai;Zuo Xiaolei
对齐碳纳米管（CNT）是制造基于CNT的电子器件的关键挑战。在此，我们报告了一种球形核酸（SNA）介导的方法，用于在DNA折纸上的指定位点高度精确地对准CNT。我们发现，在SNA和DNA涂覆的CNT的界面处发生的合作DNA杂交导致定位效率提高约5倍。通过将其与DNA折纸的固有定位可寻址性相结合，CNT可以以10°以内的极小角度变化平行排列。此外，我们证明，平行对齐的碳纳米管，防止不正确的逻辑功能源自由未对齐的碳纳米管形成的杂散导电路径。因此，这种SNA介导的方法具有制造用于纳米电子学的可扩展CNT阵列的巨大潜力。
Aligning carbon nanotubes (CNTs) is a key challenge for fabricating CNT‐based electronic devices. Herein, we report a spherical nucleic acid (SNA) mediated approach for the highly precise alignment of CNTs at prescribed sites on DNA origami. We find that the cooperative DNA hybridization occurring at the interface of SNA and DNA‐coated CNTs leads to an approximately five‐fold improvement of the positioning efficiency. By combining this with the intrinsic positioning addressability of DNA origami, CNTs can be aligned in parallel with an extremely small angular variation of within 10°. Moreover, we demonstrate that the parallel alignment of CNTs prevents incorrect logic functionality originating from stray conducting paths formed by misaligned CNTs. This SNA‐mediated method thus holds great potential for fabricating scalable CNT arrays for nanoelectronics.