title: Enhanced electrochemiluminescence sensor for detecting dopamine based on gold nanoflower@graphitic carbon nitride polymer nanosheet-polyaniline hybrids.
abstract: In this work, an enhanced electrochemiluminescence (ECL) sensor based on gold nanoflower@graphitic carbon nitride polymer nanosheet-polyaniline hybrids (AuNF@g-C3N4-PANI) was prepared for the detection of dapamine (DA). First, the bulk g-C3N4 was prepared through polymerizing melamine under 600 °C. And then the g-C3N4 nanosheet was obtained by ultrasonication-assisted liquid exfoliation of bulk g-C3N4. Finally, polyaniline (PANI) and gold nanoflowers (AuNFs) were successively formed on the g-C3N4 nanosheet through an in situ synthesis method. The resulting AuNF@g-C3N4-PANI hybrids were modified onto the surface of glassy carbon electrode to achieve a sensor (AuNF@g-C3N4-PANI/GCE) for detecting dopamine. Under the optimal conditions, the ECL signal increased linearly with the concentration of dopamine. The linear range of 5.0 × 10(-9) to 1.6 × 10(-6) M was obtained, while the detection limit was 1.7 × 10(-9) M. The prepared sensor exhibited a low detection limit and high sensitivity for the determination of dopamine. The combination of g-C3N4 nanosheet, PANI and AuNF would provide a new opportunity for the ECL sensor.
authors.affiliation: Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Southwest University, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
authors.forename: Qiyi
authors.initials: Q
authors.lastname: Lu
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Liu
authors.forename: Yuanya
authors.initials: Y
authors.lastname: Wu
authors.forename: Ruo
authors.initials: R
authors.lastname: Yuan
authors.forename: Shihong
authors.initials: S
authors.lastname: Chen
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis*; D015259:Dopamine Agents / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D008163:Luminescent Measurements / Q000379:methods; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D009570:Nitriles / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D015259:Dopamine Agents; D009570:Nitriles; C416807:polyaniline; C011206:cyanogen; D006046:Gold; D006108:Graphite; D004298:Dopamine