School of Agricultural Equipment Engineering Institute of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
School of Agricultural Equipment Engineering Institute of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Biosens Bioelectron. 2017 Mar 15;89(Pt 1):489-495. doi: 10.1016/j.bios.2016.03.069. Epub 2016 Mar 30.
A multifunctional solid-state electrochemiluminescence (ECL) sensing platform based on poly(ethylenimine) (PEI) capped N-doped carbon dots (NCDs@PEI) as novel co-reactant of Ru(bpy) nanosheets (RuNSs) was designed for the first time. In this route, RuNSs with large surface-to-volume ratio was used as luminophor, and NCDs@PEI, which was newly synthesized and modified in one step via a facile microwave-assisted method, was served as co-reactant. The as-prepared NCDs@PEI exhibited better catalytic effect to RuNSs than naked NCDs, due to the double enhancement contribution of NCDs and PEI to RuNSs. Simultaneously, reduced graphene oxide (rGO) was further introduced to facilitate the electron transfer and amplify the ECL signal. The developed ECL sensor (NCDs@PEI-rGO/RuNSs/GCE) exhibited desired ECL emission, with about 69-fold enhancement of the ECL intensity in comparison with RuNSs/GCE. When used as ECL probe for dopamine detection, the prepared sensor showed high sensitivity in a wide linear range of 0.01-50μM with the detection limit of 10nM. Moreover, the sensing platform also suggested multifunctional application for detecting other compounds including bisphenol A, catechol and hydroquinone.
首次设计了一种基于聚乙二胺（PEI）封端的 N 掺杂碳点（NCDs@PEI）作为 Ru（bpy）纳米片（RuNSs）新型共反应物的多功能固态电致化学发光（ECL）传感平台。在该路线中，具有大表面积与体积比的 RuNSs 被用作发光体，而 NCDs@PEI 则是通过简便的微波辅助方法一步新合成和修饰的，用作共反应物。与裸 NCDs 相比，所制备的 NCDs@PEI 对 RuNSs 具有更好的催化作用，这归因于 NCDs 和 PEI 对 RuNSs 的双重增强作用。同时，进一步引入还原氧化石墨烯（rGO）以促进电子转移并放大 ECL 信号。所开发的 ECL 传感器（NCDs@PEI-rGO/RuNSs/GCE）表现出理想的 ECL 发射，与 RuNSs/GCE 相比，ECL 强度提高了约 69 倍。当用作多巴胺检测的 ECL 探针时，该制备的传感器在 0.01-50μM 的宽线性范围内表现出高灵敏度，检测限低至 10nM。此外，该传感平台还可以用于检测其他化合物，包括双酚 A、儿茶酚和对苯二酚，具有多功能应用。
