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在自然界的生物体系中,各种各样的离子通道对物质交换、能量输运等生理过程起着重要作用.用人工制备的仿生纳米器件模仿生物孔道的离子输运性质是一项非常具有挑战性的课题.通过在对称柱形聚对苯二甲酸乙二醇酯(PET)聚合物孔道中引入非对称结构,获得了一种具有高整流比的人工纳米孔道体系.通过带正电荷的2-十一烷基-1-二硫脲乙基咪唑啉季铵盐(SUDEI)在柱形纳米孔道的单面吸附,使体系具有了非对称的电荷分布和几何结构,从而具有非线性的离子输运性质,表现出较好的门控性能.Au纳米颗粒可以与SUDEI以Au—S键稳定结合,有效地减小柱孔一端的孔径,进一步提高体系的门控比,且该纳米通道体系非对称响应离子输运有很好的稳定性.
In the biological system of nature, a variety of ion channels play an important role in the physiological processes such as material exchange and energy transport, etc. It is a challenge to imitate the ion transport properties of biological channels by using artificial biomimetic nano-devices A kind of artificial nanoporous channel system with high rectification ratio was obtained by introducing an asymmetric structure in the symmetrical columnar polyethylene terephthalate (PET) polymer channel.Through positive charge 2 - Undecyl-1-Dithiourea Ethylimidazoline Quaternary Ammonium Salt (SUDEI) is adsorbed on the single side of columnar nanopore, which makes the system have an asymmetric charge distribution and geometry and thus has non-linear ions Transport properties, showing good gating performance.Au nanoparticle can be SUDEI Au-S bond with a stable combination of effectively reducing the pore size at one end of the pore to further improve the system’s gated ratio, and the nanochannel system Asymmetric ion transport has good stability.