Study of chemical field effect transistors for the detection of ammonium and nitrate ions in liquid and soil phases
Study of chemical field effect transistors for the detection of ammonium and nitrate ions in liquid and soil phases
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DOI：
10.1016/j.snb.2021.130949
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发表时间：
2022-01-15
影响因子：
8.4
通讯作者：
Temple-Boyer, P.
中科院分区：
文献类型：
--
作者：
Joly, M.;Marlet, M.;Temple-Boyer, P.
本文介绍了用于土壤氮离子分析的化学场效应晶体管传感器的研制。重点对氟聚硅氧烷（FPSX）聚合物为基础的矩阵，nonactin和tetradodecylammonium nitrate（TDDAN）被证明有最好的性能分别为铵NH 4+和硝酸根NO3-离子的检测。因此，基于FPSX的pNH（4）-ISFET和pNO（3）-ISFET微传感器表现出良好的检测性能（在适合土壤分析的浓度范围内，灵敏度约为56 mV/pX）和可接受的对土壤主要有害离子（K+，Na+，Ca 2+，Cl-，H2 PO 42-，SO 42-，.）的选择性。随后，将两种不同的ISFET传感器应用于现场土壤分析。因此，使用标准的相对湿度，在粘土粉砂基质的pH值分析证明了在六个月的时间（与农业应用在施肥期间兼容）。然后，实验研究成功地扩展到通过pNH（4）测量监测氮矿化，以及土壤硝化过程的分析。最后，进行了长期分析，根据所选择的离子载体显示了矛盾的结果：对于nonactin和基于PFSX的pNH（4）-ISFET，在六个月的时间内“零”时间漂移，而对于TDDAN和基于PFSX的pNO（3）-ISFET，时间漂移很大。这项工作铺平了道路，为未来的长期离子分析在土壤基质。
The development of ChemFET-based sensors for the soil analysis of nitrogen-based ions is described in this work. Focusing on the fluoropolysiloxane (FPSX) polymer-based matrix, nonactin and tetradodecylammonium nitrate (TDDAN) were shown to have the best properties for the detection of ammonium NH4+ and nitrate NO3- ions respectively. Thus, FPSX-based pNH(4)-ISFET and pNO(3)-ISFET microsensors exhibited good detection properties (sensitivity around 56 mV/pX in concentration ranges adapted to soil analysis) and acceptable selectivity to soil main interferent ions (K+, Na+, Ca2+, Cl-, H2PO42-, SO42-,...). Following, the two different ISFET sensors were applied to the in-situ soil analysis. Thus, using standard relative moistures, pH analysis in clay-silt matrixes was demonstrated on a six-month period (compatible with agriculture applications during the fertilization period). Then, experimental studies were successfully extended to the monitoring of nitrogen mineralization through pNH(4) measurement, as well as to the analysis of soil nitration processes. Finally, long-term analyses were performed, showing contradictory result according to the chosen ionophore: a "zero" temporal drift on a six-month period for nonactin and PFSX-based pNH(4)-ISFET, and a huge temporal drift for TDDAN and PFSX-based pNO(3)-ones. This work paves the way for future long-term ionic analyses in soil matrix.