Simple Self-Powered Sensor for the Detection of D2O and Other Isotopologues of Liquid Water,ACS Sensors

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Simple Self-Powered Sensor for the Detection of D2O and Other Isotopologues of Liquid Water
ACS Sensors ( IF 8.2 ) Pub Date : 2023-09-19 , DOI: 10.1021/acssensors.3c01772
Xiaoye Zhao ₁ , Hanwen Yang ₁ , Walter W Duley _{1,

2} , Shuo Zheng ₁ , Tao Guo ₁ , Norman Y Zhou ₁

Affiliation

Distinguishing between heavy water and regular water has been a continuing challenge since these isotopologues of water have very similar physical and chemical properties. We report the development and evaluation of a simple, inexpensive sensor capable of detecting liquid D₂O and other isotopologues of liquid water through the measurement of electrical signals generated from a nanoporous alumina film. This electrical output, consisting of a sharp voltage pulse followed by a separate broad voltage pulse, is present during the application of microliter volumes of liquid. The amplitude and temporal characteristics of these pulses have been combined to enable four diagnostic parameters for sensing D₂O and H₂¹⁸O. The sensing mechanism is based on different modification effects on the alumina surface by H₂O and D₂O, spatially localized variations in the surface potential of alumina induced by isotopically substituted water molecules, combined with the effect of isotopic composition on charge transfer. As a proof-of-concept demonstration, a sensing system has been developed that provides real-time detection of liquid D₂O in a stand-alone system.

中文翻译：

用于检测 D2O 和液态水其他同位素体的简单自供电传感器

区分重水和普通水一直是一个持续的挑战，因为这些水的同位素体具有非常相似的物理和化学性质。我们报告了一种简单、廉价的传感器的开发和评估，该传感器能够通过测量纳米多孔氧化铝膜产生的电信号来检测液体 D _{2 O 和液态水的其他同位素体。}这种电输出由尖锐的电压脉冲和随后的单独的宽电压脉冲组成，在施加微升体积的液体期间出现。这些脉冲的幅度和时间特性相结合，可实现用于感测 D ₂ O 和 H ₂¹⁸ O 的四个诊断参数。感测机制基于 H ₂ O 和 D ₂ O 在空间上对氧化铝表面的不同改性作用。由同位素取代的水分子引起的氧化铝表面电势的局部变化，以及同位素组成对电荷转移的影响。作为概念验证演示，我们开发了一种传感系统，可以在独立系统中实时检测液体 D _{2 O。}

更新日期：2023-09-19

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