使用聚邻苯二胺功能化光纤光学生物传感器监测敏感 pH 值。
Sensitive pH Monitoring Using a Polyaniline-Functionalized Fiber Optic-Surface Plasmon Resonance Detector.
机构信息
National Institute for Laser, Plasma and Radiation Physics (INFLPR), Atomiştilor Street 409, 077125 Măgurele, Ilfov, Romania.
Faculty of Physics, R&D Center for Materials and Electronic & Optoelectronic Devices (MDEO), University of Bucharest, Atomiştilor Street 405, 077125 Măgurele, Ilfov, Romania.
出版信息
Sensors (Basel). 2021 Jun 19;21(12):4218. doi: 10.3390/s21124218.
In this work, we report results on the fabrication and characterization of a surface plasmon resonance (SPR) pH sensor using platinum (Pt) and polyaniline (PANI) layers successively coated over an unclad core of an optical fiber (FO). The plasmonic thin Pt layer was deposited using a magnetron sputtering technique, while the pH-sensitive PANI layer was synthesized using an electroless polymerization method. Moreover, the formation of PANI film was confirmed by X-ray photoelectron spectroscopy (XPS) technique and its surface morphology was investigated using scanning electron microscopy (SEM). It was found that the PANI/Pt-coated FO-SPR pH sensor exhibits a fast and linear response in either acid or alkali solutions (pH operational range: 1 to 14). The proposed FO-SPR sensor could be used for biomedical applications, environmental monitoring or any remote, real-time on-site measurements.
在这项工作中，我们报告了使用依次涂覆在光纤（FO）无涂层芯上的铂（Pt）和聚苯胺（PANI）层制造和表征表面等离子体共振（SPR）pH 传感器的结果。等离子体薄Pt 层是使用磁控溅射技术沉积的，而pH 敏感的PANI 层是通过无电镀聚合方法合成的。此外，通过 X 射线光电子能谱（XPS）技术确认了PANI 膜的形成，并使用扫描电子显微镜（SEM）研究了其表面形态。结果发现，PANI/Pt 涂覆的 FO-SPR pH 传感器在酸或碱溶液中表现出快速和线性响应（pH 工作范围：1 到 14）。所提出的 FO-SPR 传感器可用于生物医学应用、环境监测或任何远程、实时现场测量。
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