高娟娟博士研究生与团队成员，刘茂祥，太玉，宋欣，钱悦月等，通过协同组合β-环糊精边缘功能化的石墨烯和作为导电桥的多壁碳纳米管（MWCNTs）成功构建了用于快速和超灵敏电化学传感应用的高度导电的3D互连碳框架GN-CD-cMWCNT。尽管使用了微量的且稳定位于石墨烯边缘的环糊精，但由于MWCNTs的引入，合成设计的结构表现出非常稳定的结构和对多分子的敏感响应。因此，所该材料所修饰的玻碳电极可以同时痕量测定多巴胺、尿酸和色氨酸。它们的氧化峰电流与浓度呈良好的线性关系，检测限（3倍信噪比）分别为0.12、1.60和0.19 μmol/L。首次利用微量环糊精，依靠石墨烯和多壁碳纳米管的协同组合，成功实现了电化学性能的提高。因此，这里开发的合成策略比不断增加控制电化学性能的环糊精负载量具有更显着的优势。

Title:Synergistic combination of cyclodextrin edge-functionalized graphene and multiwall carbon nanotubes as conductive bridges towardenhanced sensing response of supramolecular recognition

Authors: Juanjuan Gao , Shupeng Zhang^*, Maoxiang Liu , Yu Tai , Xin Song , Yueyue Qian , Haiou Song ^*

Abstract: Highly conductive 3D interconnected carbon frameworks by synergistically combining β-cyclodextrin (CD) edge-functionalized graphene and multiwall carbon nanotubes (MWCNTs) as conductive bridges have been successfully constructed for rapid and ultrasensitive electrochemical sensing applications. The rationally designed architecture, even though employing trace amounts of CDs firmly located on the edge of graphene, is found to exhibit remarkable stability of structure and sensitive response of bimolecules owing to the incorporation of MWCNTs. Thus, the fabricated electrochemical sensor presents superior simultaneous trace determination of dopamine (DA), uric acid (UA) and tryptophan (Trp) over abundant CDs weakly adsorbed onto graphene surface. Their oxidation peaks could be well separated by cyclic voltammetry and differential pulse voltammetry on the selectively coupled electrode. The oxidation peak currents of DA, UA and and Trp display the excellent linear relationships to concentrations.

原文链接：http://www.sciencedirect.com/science/article/pii/S0013468615308458

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