Lab on a single fiber: A three-parameter sensor based on triple-SPR for one-to-one detection of DNA, pH and temperature

检出限 聚丙烯酸 表面等离子共振 灵敏度(控制系统) 聚二甲基硅氧烷 纤维 材料科学 光纤 光纤传感器 分析化学(期刊) 化学 生物系统 纳米技术 色谱法 光学 物理 电子工程 聚合物 生物 工程类 纳米颗粒 复合材料
作者
Pengqi Gong,Xuegang Li,Qiming Zhao,Xue Zhou,Yanan Zhang,Yong Zhao
出处
期刊:Sensors and Actuators B-chemical [Elsevier BV]
卷期号:401: 134957-134957 被引量:10
标识
DOI:10.1016/j.snb.2023.134957
摘要

In order to realize the one-to-one correspondence between outputs and inputs in the multiparameter detection field, a multiparameter DNA hybridization sensor with temperature and pH detection channels based on a fiber-based triple surface plasmon resonance (Triple-SPR) effect is demonstrated in this paper. Compared with previous works, the significant innovation of this paper is the independent temperature testing and pH testing channels implemented based on a single fiber optic structure, and the high-sensitivity DNA hybridization detection channel. Polydimethylsiloxane and the self-assembled materials formed by polyacrylic acid (PAA) and chitosan (CS) are used for the real-time detection of temperature and pH. With the help of these two materials, the instantaneous response of the Triple-SPR sensor to temperature and pH has been realized, and the response times (RT) are less than 1 s and 20 s, respectively. After the modification of probe DNA (pDNA), the selective detection of complementary DNA (cDNA) is achieved. The sensitivity and detection limit (DL) reaches 0.09 nm/(nmol/L) and 3.69 nmol/L, respectively. The experimental results demonstrate that an approximately one-to-one correspondence exists between inputs and outputs. The output signals can be used to provide feedback signals for achieving stable temperature and pH environments. The advantages of multi-parameter independent detection, high-sensitivity as well as fast response of the fiber-based Triple-SPR sensing technology are of great significance in the field of future multi-parameter sensing, compensated detection as well as real-time bio-monitoring.
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