The effect of graphene oxide (GO) is explored on the self‐assembly behavior of ferrocene‐L‐phenylalanine (Fc−F) in solution. The assembly behavior of Fc−F in GO dispersions at different concentrations and pH values was systematically investigated. At pH 8, a stable hybrid material could be formed by facile and elaborate supramolecular assembly. Moreover, the concentration of GO could also be used to adjust the mechanical strength of the hybrid hydrogel. Increasing the concentration of GO in the assembly process, a hydrogel with better mechanical strength could be obtained. The storage modulus could be up to 6.3 kPa by increasing the GO concentration to 1 mg/mL. Finally, the dopamine concentration in the solution could be detected in a high accuracy by loading the hybrid hydrogel onto the electrode surface. The R² of linear fitting equation could reach 0.9915 in the range of 10–200 μmol/L, indicating that it has the potential as biosensing electrode material.

中文翻译：

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用于多巴胺检测的二茂铁-苯丙氨酸@氧化石墨烯杂化水凝胶的自组装

研究了氧化石墨烯（GO）对二茂铁-L-苯丙氨酸（Fc-F）在溶液中的自组装行为的影响。系统研究了Fc-F在GO分散液中不同浓度和pH值下的组装行为。在pH为8时，可以通过容易且精细的超分子组装形成稳定的杂化材料。此外，GO的浓度也可用于调节混合水凝胶的机械强度。在组装过程中增加GO的浓度，可以获得具有更好机械强度的水凝胶。通过将GO浓度增加到1 mg / mL，储能模量可以达到6.3 kPa。最后，通过将杂化水凝胶装载到电极表面上，可以高精度检测溶液中的多巴胺浓度。R ² 在10–200μmol/ L的范围内，线性拟合方程的方程可达到0.9915，表明它具有作为生物传感电极材料的潜力。