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微调基于ISFET的双pH总度传感器,用于在海水中使用可调节的悬浮阳极进行操作

Ellen M Briggs¹, Todd R Martz¹

¹Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92037, United States.

|September 28, 2025

概括

这项研究引入了一个更简单的,现成的固态传感器,用于测量海水的pH值和总度. 新的悬浮电极设计提高了精度,并与传统方法相比简化了制造.

科学领域:

分析化学分析化学
环境科学环境科学
材料科学材料科学材料科学

背景情况:

传统的离子敏感场效应晶体管 (ISFET) 传感器用于海水分析,需要复杂的纳米制造.
现有的设计通常涉及定制制造或后端处理,限制了可访问性和适应性.
需要简化,强大的ISFET传感器设计用于环境监测.

研究的目的:

介绍一个基于ISFET的固态传感器的重新设想的,简化的设计,用于海水pH值和总度的测量.
为了展示一种新的传感器配置,使用现成的组件和悬挂的定位生成电极.
分析电极间距和电流对传感器性能和分辨率的影响.

主要方法:

开发了一种新的ISFET传感器配置,使用悬浮定位生成电极,避免直接沉积在ISFET芯片上.
研究了总度测量对阳极门距离和应用电流的灵敏度.
在三种不同的海水总性成分中测试了传感器.

主要成果:

悬浮阳极配置在低阳极电流 (5μA) 和大约150-200μm的阳极门距离下在海水中实现了最大的传感器分辨率.
与芯片上的阳极配置相比,新设计在等价点确定方面显示出更明显的曲率.
在131次测量中,平均传感器误差为2.85μmol kg−1,平均值为 (N=5).

结论:

现成的悬浮阳极ISFET传感器为测量海水pH值和总度提供了简单有效的方法.
这种设计避免了干扰ISFET功能,并允许更容易地探索电极参数.
增强的等价点确定和实现的传感器误差突显了这种重新设计的传感器在海洋化学应用中的潜力.

关键词:

这就是ISFET的意义.在现场的传感器.它们的pH值为pH.这是海水,海水.总的性总的性

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