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基于金纳米棒/多壁碳纳米管-壳聚糖复合膜电极的肌红蛋白直接电化学和电催化研究
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作者 黄富英 李艳彩 +2 位作者 冯树清 王飞 李元军 《湖北民族学院学报(自然科学版)》 CAS 2012年第1期6-10,14,共6页
采用金纳米棒(AuNRs)/多壁碳纳米管-壳聚糖(MWCNTs-Chit)复合膜促进肌红蛋白在电极上的直接电子转移,并用于构建H2O2生物传感器.首先将金纳米棒固定到玻碳电极表面,然后把MWCNTs-Chit分散溶液和肌红蛋白(Mb)固载到玻碳电极上,得到MWCNTs... 采用金纳米棒(AuNRs)/多壁碳纳米管-壳聚糖(MWCNTs-Chit)复合膜促进肌红蛋白在电极上的直接电子转移,并用于构建H2O2生物传感器.首先将金纳米棒固定到玻碳电极表面,然后把MWCNTs-Chit分散溶液和肌红蛋白(Mb)固载到玻碳电极上,得到MWCNTs-Chit/Mb/AuNRs复合膜电极.通过循环伏安法对膜电极进行表征,在pH=7.0磷酸缓冲溶液中,Mb表现出一对峰形良好且可逆的氧化还原峰,其中氧化峰和还原峰电位分别为-0.291 V、-0.235 V,式电位(Eθ’)为-0.263 V.与此同时还探讨了修饰电极的电催化活性,结果表明其对H2O2具有良好的电催化还原作用,可作为检测H2O2的生物传感器.传感器对H2O2的米氏常数为0.0494 mM,线性范围为5.0×10-5~5.0×10-3M(R=0.986 7,n=10),检测限为3.2×10-6M(信噪比为3). 展开更多
关键词 肌红蛋白 多壁碳纳米管 壳聚糖 金纳米棒 H2O2生物传感器
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Fabrication of superstable gold nanorod-carbon nanocapsule as a molecule loading material 被引量:3
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作者 Wei Gao Xuewei Wang +4 位作者 Huanhuan Fan Zhiling Song Xiaofang Lai Zhuo Chen Weihong Tan 《Science Bulletin》 SCIE EI CAS CSCD 2015年第12期1101-1107,I0003,共8页
In this work, we fabricated a monodisperse nanocomposite by coating gold nanorods (AuNRs) with a layer of biocompatible, stable carbon, obtaining AuNR@Carbon core-shell nanocapsules, which without any functionalizat... In this work, we fabricated a monodisperse nanocomposite by coating gold nanorods (AuNRs) with a layer of biocompatible, stable carbon, obtaining AuNR@Carbon core-shell nanocapsules, which without any functionalization could be used as a molecule loading material due to its high surface areas. In this system, the AuNR core had a high-absorption cross section for con- version of near-infrared light to heat, which could be ex- plored for local hyperthermia. The carbon shell, which was biocompatible and stable even under concentrated acidic and alkaline conditions, was able to adsorb molecules with n-n interactions or electrostatic interactions. In comparison with AuNR@SiO2, AuNR@Carbon nanocapsules demon- strate the following merits: (1) simple and green synthesis method, (2) far more stable with respect to high-tem- perature stability and (3) larger molecule loading capacity, which indicate great potential in the biomedical applications. 展开更多
关键词 aunr@carbon nanocapsules AuNR@SiO2 nanocapsules Stability Adsorption capacity
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