College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China.
College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
Talanta. 2019 Jan 1;191:222-228. doi: 10.1016/j.talanta.2018.08.079. Epub 2018 Aug 29.
A quartz crystal microbalance (QCM) sensor for detecting cytochrome c based on an oriented surface epitope imprinted polymer was fabricated in this paper. By using the palmitic acid-modified epitope of cytochrome c as the template and the 3-aminopropyltriethoxysilane as the monomer, we prepared a new oriented surface epitope imprinted polymer by the reverse microemulsion polymerization. The prepared oriented imprinted polymer had better imprinting effect than the non-oriented imprinted polymer. And compared to previous studies, this polymerization method is simple and could be carried out at room temperature in the presence of oxygen, under regular atmospheric conditions. Then, by combining the advantages of molecularly imprinted polymers and QCM sensors, we used the prepared polymer to establish a QCM sensor. The described sensor showed good sensitivity and selectivity towards cytochrome c. The linear range was from 0.005 μg mL to 0.050 μg mL and the detection limit was 3.6 ng mL which is lower than most of previous works. Besides, it could be used for real sample analysis and had satisfactory reproducibility and accuracy. This work proposed a new way of fabricating oriented surface epitope imprinted polymers-based QCM sensors for selectively detecting proteins at very low concentrations.
本文制备了一种基于定向表面表位印迹聚合物的石英晶体微天平(QCM)传感器,用于检测细胞色素 c。通过使用细胞色素 c 的十六烷酸修饰表位作为模板,3-氨丙基三乙氧基硅烷作为单体,我们通过反相微乳液聚合制备了一种新型定向表面表位印迹聚合物。与非定向印迹聚合物相比,所制备的定向印迹聚合物具有更好的印迹效果。与以前的研究相比,这种聚合方法简单,可在有氧、常规大气条件下于室温下进行。然后,结合分子印迹聚合物和 QCM 传感器的优点,我们使用制备的聚合物建立了 QCM 传感器。该传感器对细胞色素 c 表现出良好的灵敏度和选择性。线性范围为 0.005μgmL 至 0.050μgmL,检测限为 3.6ngmL,低于大多数先前的工作。此外,它可用于实际样品分析,具有令人满意的重现性和准确性。这项工作提出了一种新的方法来制备基于定向表面表位印迹聚合物的 QCM 传感器,用于选择性地检测非常低浓度的蛋白质。