文献类型： 外文期刊

作者： Qin, Junqing ¹ ; Gao, Suhua ¹ ; Li, Hongji ¹ ; Li, Cuiping ² ; Li, Mingji ² ;

作者机构： 1.Tianjin Univ Technol, Sch Chem & Chem Engn, Tianjin Key Lab Organ Solar Cells & Photochem Con, Tianjin Key Lab Drug Targeting & Bioimaging, Tianjin 300384, Peoples R China

2.Tianjin Univ Technol, Engn Res Ctr Optoelect Devices & Commun Technol, Tianjin Key Lab Film Elect & Commun Devices, Sch Elect & Elect Engn,Minist Educ, Tianjin 300384, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

关键词： Graphene; Vertical growth; Carbon onion; DNA bases; Electrochemical sensor

期刊名称：JOURNAL OF ELECTROANALYTICAL CHEMISTRY （ 影响因子：4.464； 五年影响因子：4.058 ）

ISSN： 1572-6657

年卷期： 2021 年 895 卷

页码：

收录情况： SCI

摘要： A novel carbon film composed of glassy carbon (GC), monolayer graphene (Gr), and multilayer Gr was prepared by continuously growing Gr sheets on a GC substrate, using Au nanoparticles as catalysts. The formation of the monolayer Gr sheets and the vertical growth mechanism of the multilayer Gr sheets were investigated by analyzing the morphology, microstructure, and composition variations. The carbon multilayer film can recognize biomolecules and inorganic ions, and can respond to up to 10 species. This function is based on the inherent electrocatalytic activity of the carbon film without modification using additional sensitive materials. The use of the multilayer carbon film as an electrochemical biosensor was investigated with the four DNA bases: guanine (G), adenine (A), thymine (T), and cytosine (C). The carbon film clearly identified G, A, T, and C in a neutral electrolyte environment, with detection limits of 0.3, 0.4, 6.5, and 4.5 mu M, respectively; the peak potential differences for A-G, T-A, and C-T were 164, 216, and 184 mV, respectively. This carbon film can replace commercial GC, Au, and carbon paste electrodes and function as a basic electrode to explore new electrochemical sensors with high functionality and sensitivity.