可重复使用的超敏快速有机磷压电传感技术

Reusable Ultrasensitive and Rapid Response Organophosphorus Piezoelectric Sensing Technology

摘要:

有机磷化合物的过度使用引发严重的环境污染问题。研究表明，即使环境中的残留浓度远低于现行安全阈值，但这类化合物仍可引发各种神经系统疾病，对人类健康构成长期威胁，而研发高灵敏度、高选择性以及能快速响应的化学传感器势在必行。该文通过分子设计提高材料对分析物的传感选择性；通过电化学原位聚合获得高比表面积的材料界面，提高传感灵敏度；通过动力学拟合计算优化传感条件，提高传感响应速率并赋予其重复使用特性。最终在石英晶体微天平上实现了满足 10^-9 级别的检测限和强抗干扰能力的有机磷质量传感，可同时兼顾秒级的响应速度和可重复使用性。

Abstract:

The excessive use of organophosphorus compounds has led to severe environmental pollution. Studies have shown that even at residual concentrations exceedingly below current safety thresholds， these compounds can still induce various neurological disorders， posing long-term threats to human health. It is imperative to develop chemical sensors with high sensitivity， high selectivity， and rapid response. In this study， the sensing selectivity of the material to the analyte is enhanced via molecular design. Furthermore， the material interface with a high specific surface area is obtained via in-situ electrochemical polymerization， improving the sensing sensitivity. Based on kinetic fitting calculations， the sensing conditions are optimized， significantly increasing the sensing response rate and endowing it with reusability. Eventually， an organophosphorus mass sensing that satisfies the detection limit at the 10^-9 level and has strong anti-interference ability is realized on a quartz crystal microbalance， while also considering the response speed at the second level and reusability.