β-Cyclodextrin-Immobilized Ni/Graphene Electrode for Electrochemical Enantiorecognition of Phenylalanine
β-Cyclodextrin-Immobilized Ni/Graphene Electrode for Electrochemical Enantiorecognition of Phenylalanine
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DOI：
10.3390/ma13030777
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发表时间：
2020-02-01
期刊：
影响因子：
3.4
通讯作者：
Fu, Li
中科院分区：
文献类型：
--
作者：
Chen, Feiyue;Fan, Zhiqin;Fu, Li
在这项工作中，采用等离子体增强化学气相沉积（PECVD）技术设计并制备了镍/石墨烯（Ni/G）电极，用于超灵敏识别d-和l-苯丙氨酸。通过单步PECVD工艺，Ni/G电极可以获得更好的亲水性和更大的催化表面积，有利于生物物体的电化学识别。经β -环糊精表面修饰后，Ni/G电极在差分脉冲伏安测试中可以根据0.09 V的峰移区分d-苯丙氨酸和l-苯丙氨酸。此外，该Ni/G电极对l-苯丙氨酸的检测限低至1 nM，线性范围从1 nM到10 mM，具有良好的存储稳定性和工作稳定性。
In this work, a Ni/graphene (Ni/G) electrode was designed and fabricated by plasma-enhanced chemical vapor deposition (PECVD) for the ultrasensitive recognition of d- and l-phenylalanine. Through a single-step PECVD process, the Ni/G electrode can achieve better hydrophilicity and larger catalytic surface area, which is beneficial for the electrochemical recognition of bio-objects. After surface modification with beta-cyclodextrin, the Ni/G electrode can distinguish d-phenylalanine from l-phenylalanine according to a 0.09 V peak shift in differential pulse voltammetry tests. Moreover, this Ni/G electrode achieved a detection limit as low as 1 nM and a wide linear range from 1 nM to 10 mM toward l-phenylalanine, with great storage stability and working stability.