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Real Time Sensing of Soil Potassium Levels Using Zinc Oxide-Multiwall Carbon Nanotube-Based Sensors
IEEE Transactions on NanoBioscience ( IF 3.9 ) Pub Date : 2020-09-30 , DOI: 10.1109/tnb.2020.3027863 A. Akshaya Kumar , S. K. Naveen Kumar , Renny Edwin Fernandez
IEEE Transactions on NanoBioscience ( IF 3.9 ) Pub Date : 2020-09-30 , DOI: 10.1109/tnb.2020.3027863 A. Akshaya Kumar , S. K. Naveen Kumar , Renny Edwin Fernandez
There is a significant interest in the detection and monitoring of nutrient levels in agriculture farms. In this article, we report the fabrication of Zinc oxide (ZnO) modified multi-walled Carbon nanotube (F-MWCNT) sensor specifically developed for soil nutrient sensing. A thin layer of Valinomycin membrane was grown on the top of the F-MWCNT/ZnO nanocomposite active layer. The resulting composite structure Al/F-MWCNT/ZnO/Valinomycin was found to have a proportional impedance change with soil Potassium (K
+
) levels. The performance of the sensor was investigated in the 1- 5 kHz range. The impedance magnitude was found to linearly decrease from 2.5± 0.23 to $0.63\pm 0.12~\text{M}\Omega $ range for K
+ concentrations from 5 to 25 mM displaying a sensitivity of $\sim 3~\text{M}\Omega $
/mM with a correlation coefficient (R
2
) of 0.95744.
中文翻译:
使用氧化锌多壁碳纳米管传感器实时检测土壤钾含量
人们对农业农场中营养水平的检测和监测非常感兴趣。在本文中,我们报告了专门为土壤养分传感而开发的氧化锌 (ZnO) 改性多壁碳纳米管 (F-MWCNT) 传感器的制造。在 F-MWCNT/ZnO 纳米复合活性层的顶部生长一薄层缬氨霉素膜。发现所得复合结构 Al/F-MWCNT/ZnO/Valinomycin 具有与土壤钾 (K + ) 水平成比例的阻抗变化 。在 1-5 kHz 范围内研究了传感器的性能。发现阻抗幅度从 2.5±0.23 线性下降到 $0.63\pm 0.12~\text{M}\Omega $ K +浓度范围为
5 至 25 mM,显示灵敏度为 $\sim 3~\text{M}\Omega $
/mM 的相关系数 (R
2
) 为 0.95744。
更新日期:2020-09-30
中文翻译:
使用氧化锌多壁碳纳米管传感器实时检测土壤钾含量
人们对农业农场中营养水平的检测和监测非常感兴趣。在本文中,我们报告了专门为土壤养分传感而开发的氧化锌 (ZnO) 改性多壁碳纳米管 (F-MWCNT) 传感器的制造。在 F-MWCNT/ZnO 纳米复合活性层的顶部生长一薄层缬氨霉素膜。发现所得复合结构 Al/F-MWCNT/ZnO/Valinomycin 具有与土壤钾 (K + ) 水平成比例的阻抗变化 。在 1-5 kHz 范围内研究了传感器的性能。发现阻抗幅度从 2.5±0.23 线性下降到