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Amperometry: Overview

Amperometry: Overview

Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...

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Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors

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一个具有成本效益的无参考性半导体离子传感器,带有阳极氧化薄膜.

Yiming Zhong¹, Peng Sun², Zhidong Hou¹

¹State Key Laboratory of Integrated Chips and Systems, College of Integrated Circuits and Micro-Nano Electronics Innovation, Fudan University, Shanghai 200433, China.

Sensors (Basel, Switzerland)

|November 13, 2025

概括

这项研究引入了一种新型的无参考离子传感器 (RELESIS),可以消除小型化,低成本应用的重电极. 该RELESIS表现出高pH的灵敏度,使得实时监测牛奶的新鲜度.

关键词:

阳极氧化的氧化.一个pH值传感器.没有参考-没有参考-没有参考

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科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
传感器技术传感器技术

背景情况:

离子检测对于工业和生物医学领域至关重要.
传统的离子传感器面临着诸如体积,成本高,小型化不良等局限性.
现有的传感器需要昂贵的参考电极,阻碍半导体集成.

研究的目的:

开发一个小型化的,具有成本效益的,无参考性的离子传感器.
为了克服传统的离子敏感场效应晶体管的局限性.
展示用于便携式离子传感应用的新型传感器平台.

主要方法:

使用阳极氧化膜制造无参考半导体离子传感器 (RELESIS).
使用金属氧化物半导体场效应晶体管与数字间电极.
在低成本制造中采用阳极氧化,而不是原子层沉积.

主要成果:

该RELESIS设备实现了出色的pH灵敏度 (57.8mV/pH) 与低歇斯底里 (7mV).
通过检测pH值变化,通过实时,非破坏性监测牛奶新鲜度.
成功消除了对参考电极的需求,使设备微型化成为可能.

结论:

RELESIS提供了一个有前途的,低成本的,小型化的离子传感解决方案.
该技术适用于食品安全,环境监测和诊断领域的下一代便携式系统.
无参考的设计和卓越的性能为先进的护理点设备铺平了道路.