用氧化反应剂优化电解质,以改善阻抗指标信号,用于低成本分析仪
Yu-Hsuan Cheng1, Charmi Chande1, Zhenglong Li1
1Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, 323 Dr Martin Luther King Jr Blvd, Newark, NJ 07102, USA.
Biosensors
|December 22, 2023
概括
这项研究展示了一种具有成本效益的生物传感方法,通过用USB振荡器取代昂贵的设备. 这种方法保持了类似的敏感性点的护理设备,使先进的诊断更负担得起.
科学领域:
- 电化学 电化学 电化学
- 生物传感器技术技术
- 分析化学 分析化学
背景情况:
- 负担能力是诊断设备的重大挑战,阻碍了广泛采用.
- 现有的基于阻抗的生物传感器平台通常依赖于昂贵的实验室设备,限制了它们的可访问性.
研究的目的:
- 开发一种途径,将基于阻抗的ESSENCE生物传感器平台从高成本的分析仪转换为低成本的USB振荡仪.
- 评估使用负担得起的仪器仪表用于敏感的生物传感应用的可行性.
主要方法:
- 通过尼奎斯特曲线分析,对电解质 (KCl,PBS) 和氧化还原缓冲剂 (铁/铁化物,[Ru(bpy) 3 2+) 的相互作用进行了基本研究.
- 在ESSENCE平台的测试中,使用了高成本的桌面分析仪 (KeySight 4294A) 和低成本的USB振荡仪 (Analog Discovery 2).
- 研究了电解质离子强度和氧化还原度对阻抗光谱学的影响.
主要成果:
- 氧化分子显著改变了阻抗尼奎斯特曲线,观察到明显的RC半圆.
- 增加的离子强度或氧化还原度将RC半圆转移到更高的频率.
- 低成本的USB振荡仪给出了与昂贵的分析仪相似的结果,检测极限降低.
结论:
- 对于像ESSENCE这样的阻抗式生物传感器来说,向低成本的USB振荡器过渡是可行的,提供了约100倍的价格降低.
- 优化电解质成分 (具有高离子强度的缓冲盐水) 和降低氧化还原探针度对于具有负担得起的分析仪的信号质量至关重要.
- 这项工作为更实惠和更容易获得的诊断工具铺平了道路.
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