文献类型： 外文期刊
作者： Liang, Shan 1 ; Wu, Lidong 2 ; Liu, Huan 2 ; Li, Jincheng 2 ; Chen, Mengze 3 ; Zhang, Min 1 ;
作者机构： 1.Beijing Technol & Business Univ, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing 100048, Peoples R China
2.Chinese Acad Fishery Sci, Minist Agr, Key Lab Control Qual & Safety Aquat Prod, Beijing 100141, Peoples R China
3.Beijing Agr Univ, Food Sci & Engn Coll, Beijing 102206, Peoples R China
关键词： Passivation of phosphorene; PP-AuNP nanocomposite; Aptamer; Electrochemistry; Biosensor
期刊名称：BIOSENSORS & BIOELECTRONICS （ 影响因子：10.618； 五年影响因子：9.323 ）
ISSN： 0956-5663
年卷期： 2019 年 126 卷
页码：
收录情况： SCI
摘要： Black phosphorus (BP), also known as phosphorene (PP), is a fascinating two-dimensional (2D) material with extraordinary anisotropic mechanical, electronic and optoelectronic properties. However, PP is sensitive to oxygen and moisture and is completely degenerated by oxygen and humid air within 12 h, which limits its applications. Here, we coat PP with hexamethylenediamine (HMA), which allows the coated PP to maintain its original form in aqueous solution for over one month. The stable PP is dotted with gold nanoparticles to facilitate binding to a 3,3'4,4'-polychlorinated biphenyl (PCB77) aptamer (ap) as a biosensor. The aptamer biosensor based on gold nanoparticle-dotted PP nanocomposites (PP-AuNPs) exhibits superior analytical performance, and its sensitivity (391.1 mu A cm(-2)) is approximately three times higher than that of an AuNP-based sensor (AuNP-Ap/Au electrode, 147.2 mu A cm(-2)). This biosensor has a low detection limit (DL) of 33 pg L-1 toward PCB77 with a dynamic response range toward PCB77 from 100 pg L-1 to 10 mu g L-1. This research opens up avenues for the use of PP to make multiplexed diagnosis platforms in aqueous systems.
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