Frusawa Hiroshi, Yoshii Gen
Institute for Nanotechnology, Kochi University of Technology, Tosa-Yamada, 782-8502 Kochi Japan.
Nanoscale Res Lett. 2015 Mar 1;10:107. doi: 10.1186/s11671-015-0817-3. eCollection 2015.
Among a variety of solution-based approaches to fabricate anisotropic films of aligned carbon nanotubes (CNTs), we focus on the dielectrophoretic assembly method using AC electric fields in DNA-stabilized CNT suspensions. We demonstrate that a one-stop manufacturing system using electrode needles can draw anisotropic DNA-CNT hybrid films of 10 to 100 µm in size (i.e., free-standing DNA-CNT micro-cloths) from the remaining suspension into the atmosphere while maintaining structural order. It has been found that a maximal degree of polarization (ca. 40%) can be achieved by micro-cloths fabricated from a variety of DNA-CNT mixtures. Our results suggest that the one-stop method can impart biocompatibility to the downsized CNT films and that the DNA-stabilized CNT micro-cloths directly connected to an electrode could be useful for biofuel cells in terms of electron transfer and/or enzymatic activity.
在各种基于溶液的方法来制备排列的碳纳米管（CNT）的各向异性薄膜中，我们专注于在DNA稳定的CNT悬浮液中使用交流电场的介电泳组装方法。我们证明，使用电极针的一站式制造系统可以从剩余的悬浮液中在大气中绘制尺寸为10至100微米的各向异性DNA-CNT混合薄膜（即独立的DNA-CNT微布），同时保持结构有序。已经发现，由各种DNA-CNT混合物制成的微布可以实现最大极化程度（约40%）。我们的结果表明，一站式方法可以赋予小型化的CNT薄膜生物相容性，并且直接连接到电极的DNA稳定的CNT微布在电子转移和/或酶活性方面可能对生物燃料电池有用。
