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Printed oxygen gas sensor using copper-DTDTPA solid electrolyte
Analyst ( IF 3.6 ) Pub Date : 2021-2-2 , DOI: 10.1039/d0an02391d
Nivedita Priyadarshni _{1,

2,

3,

4,

5} , Soumen Mandal _{1,

2,

3,

4,

5} , Supradeepa Panual Ganesan _{1,

2,

3,

4} , Saurav Halder _{1,

2,

3,

4} , Debolina Roy _{1,

2,

3,

4,

5} , Nripen Chanda _{1,

2,

3,

4,

5}

Affiliation

We present a new method for the rapid and cost-effective fabrication of solid electrolyte-based printed potentiometric oxygen sensors working at ambient temperature using Cu-dithiolated diethylene triamine pentaacetic acid complex molecules (Cu-DTDTPA) adsorbed on Grade-1 laboratory filter paper and subsequent 3-D printing of interdigitated electrodes employing silver/silver chloride ink. The decrease in conductivity with time and frequency-dependent impedance response confirms the filter paper adsorbed Cu-DTDTPA as a solid electrolyte. A plausible structure of the Cu-DTDTPA solid electrolyte and its mechanism of reaction with oxygen are presented. A maximum sensitivity of 0.052 mV per %O₂, the maximum response time of 1.15 s per %O₂, a wide measurement output ranging from 14.55 mV to 17.25 mV for 20%–90% of O₂ concentration, a maximum standard deviation of 0.12 mV in output voltage, almost similar trends of the response on temperature, humidity variations and ageing and high selectivity establish the sensor for use in medical ventilator applications, specifically in the COVID19 pandemic.

中文翻译：

使用铜-DTDTPA固体电解质的印刷氧气传感器

我们提出了一种新的方法，用于快速，经济高效地制造在环境温度下工作的固态电解质基印刷电位氧传感器，该方法使用吸附在1级实验室滤纸和随后使用银/氯化银墨水对指状电极进行3-D打印。电导率随时间和频率相关的阻抗响应而降低，证实滤纸吸附的Cu-DTDTPA为固体电解质。提出了Cu-DTDTPA固体电解质的合理结构及其与氧反应的机理。每％氧气0.052毫伏的最大灵敏度₂，每％氧气1.15 S中的最大响应时间₂，对于20％至90％的O ₂浓度，测量输出范围从14.55 mV到17.25 mV ，输出电压的最大标准偏差为0.12 mV，在温度，湿度变化和老化以及高选择性方面的响应趋势几乎相似建立用于医疗呼吸机应用的传感器，特别是在COVID19大流行中。

更新日期：2021-02-17

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