Xu Xiuru, Wang Wei, Sun Bolun, Zhang Xue, Zhao Rui, Wang Ce
Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, China.
School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
Materials (Basel). 2018 Oct 24;11(11):2084. doi: 10.3390/ma11112084.
In this work poly(3,4-ethylenedioxythiophene) (PEDOT) coated SnO₂-Fe₂O₃ continuous nanotubes with a uniform core⁻shell structure have been demonstrated for rapid sensitive detection of iodide ions. The SnO₂-Fe₂O₃ nanotubes were firstly fabricated via an electrospinning technique and following calcination process. An in situ polymerization approach was then performed to coat a uniform PEDOT shell on the surface of as-prepared SnO₂-Fe₂O₃ nanotubes by vapor phase polymerization, using Fe₂O₃ on the surface of nanotubes as an oxidant in an acidic condition. The resultant PEDOT@SnO₂-Fe₂O₃ core-shell nanotubes exhibit a fast response time (~4 s) toward iodide ion detection and a linear current response ranging from 10 to 100 μM, with a detection limit of 1.5 μM and sensitivity of 70 μA/mM/cm². The facile fabrication process and high sensing performance of this study can promote a wide range of potential applications in human health monitoring and biosensing systems.
在这项工作中，具有均匀核壳结构的聚（3,4-乙撑二氧噻吩）（PEDOT）包覆的SnO₂-Fe₂O₃连续纳米管已被证明可用于快速灵敏地检测碘离子。首先通过静电纺丝技术和随后的煅烧过程制备了SnO₂-Fe₂O₃纳米管。然后采用原位聚合方法，在酸性条件下，以纳米管表面的Fe₂O₃为氧化剂，通过气相聚合在制备好的SnO₂-Fe₂O₃纳米管表面包覆一层均匀的PEDOT壳。所得的PEDOT@SnO₂-Fe₂O₃核壳纳米管对碘离子检测表现出快速响应时间（约4秒）和10至100μM的线性电流响应，检测限为1.5μM，灵敏度为70μA/mM/cm²。本研究简便的制备工艺和高传感性能可促进其在人体健康监测和生物传感系统中的广泛潜在应用。
