One-step process for fabricating paper-based solid-state electrochemiluminescence sensor based on functionalized graphene

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• 作者：Wenling Gu ; Yuanhong Xu ; Baohua Lou ; Zhaozi Lyu ; Erkang Wang
• 关键词：Paper-based chips ; One-step process ; Functionalized graphene ; Electrochemiluminescence sensor ; Tetracycline hydrochloride
• 刊名：Electrochemistry Communications
• 出版年：January, 2014
• 年：2014
• 卷：38
• 期：Complete
• 页码：57-60
• 全文大小：480 K

文摘

Taking advantage of simple manipulation of the screen printed electrodes, with the assistance of different functionalized graphene materials, a simple and time-saving one-step process was developed for fabricating solid-state electrochemiluminescence (ECL) sensors on paper-based chips (PCs). The solid-state Ru(bpy)₃^2 + or co-reactant ECL sensors could be facilely obtained by screen-printing the mixture of Ru(bpy)₃^2 +/poly(sodium 4-styrenesulfonate) functionalized graphene nanosheets (PSSG)/carbon paste or branch poly(ethylenimine) (BPEI)-functionalized graphene nanosheets (BPEIG)/carbon paste through one-step process on the PCs, respectively. The ECL behavior of Ru(bpy)₃^2 + ECL sensor was investigated using tripropylamine (TPA) and detection limit (S/N = 3) of 5.0 nM was obtained. It also exhibited excellent reproducibility and linear relationship with the concentration of TPA (R = 0.991). In addition, the ECL behaviors of the coreactant sensor were measured for tetracycline hydrochloride (TCH) by inhibition method. A linear relationship between the ECL intensity and logarithm of the concentration of TCH was gained in a range of 1 脳 10^鈭?#xA0;8 to 1 脳 10^鈭?#xA0;6 M and the detection limit was as low as 2.22 nM. Therefore the one-step process for fabricating paper-based ECL sensor was confirmed with the advantages of simplicity, high efficiency and potential applicability.