检出限
脱氧核酶
纳米传感器
基质(水族馆)
计算机科学
立方体(代数)
材料科学
线性范围
纳米技术
电化学气体传感器
生物传感器
电化学
化学
电极
海洋学
数学
色谱法
组合数学
物理化学
地质学
作者
Jing Xu,Yujin Li,Yinbing Liu,Xu Wu,Ke‐Jing Huang
标识
DOI:10.1016/j.snb.2023.134377
摘要
As a common heavy metal pollutants, lead ion (Pb2+) content monitoring has always been the focus of environmental protection. The rapid development of self-powered electrochemical biosensors open up the broad application prospects for Pb2+ detection. In this work, we innovatively design three-dimensional (3D) hollow cube bimetallic sulfide heterojunction microparticles combine with DNAzyme functional nucleic acid mediated by hybridization chain reaction (HCR) strategy to construct the ultra-sensitive self-powered sensor. The multiple amplification technology synergically enhanced the sensitivity. The electrochemical data show that the sensor has a wide linear response in the range of 0.0010–25 ng·mL−1 with the low detection limit is 3.10 pg·mL−1 (S / N = 3). The most special feature is that the introduction of commercial smart phone APP can effectively reduce cost, simplify process, and realize rapid on-site detection. In conclusion, the work can provide a feasible strategy for monitoring other hazardous substances, and advance the determination of environmental pollutants in the field.
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