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首页> 外文期刊>IEEE sensors journal >Non-Enzymatic Urea Sensing Based on MWCNT Nanocomposite
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Non-Enzymatic Urea Sensing Based on MWCNT Nanocomposite

机译：基于MWCNT纳米复合材料的非酶促尿素检测

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摘要

In this work, we have demonstrated a urea sensor based on starch coated gold nanoparticles (S-AuNPs) and thiol group (-SH) functionalized multiwall carbon nanotube (MWCNT-SH) nanocomposite. The surface modifications of the MWCNTs are characterized using Fourier transform infrared (FTIR) and Raman spectroscopy. The surface analysis of the nanocomposite is recorded using field emission scanning electron microscope (FESEM) and field emission transmission electron microscope (FETEM). The sensor is developed on a glass substrate where silver and MWCNT-SH/S-AuNPs are used as contact electrodes and sensing material, respectively. The response of the sensor is observed over a range between 10 mg/dL to 60 mg/dL with high sensitivity and limit of detection of 0.48 mg/dL. The sensor has demonstrated almost stable performance for two months with excellent reproducibility. The developed sensor is evaluated to detect urea in a raw milk sample, where the sensor can recover urea between 85.17% and 88.73% in the milk sample. The proposed sensor has the potential to be used for milk quality assessment in households and dairy industries.
机译：在这项工作中，我们已经证明了一种基于淀粉涂覆的金纳米颗粒（S-AUNP）和硫醇基（-SH）官能化多壁碳纳米管（MWCNT-SH）纳米复合材料的尿素传感器。 MWCNT的表面修改用傅里叶变换红外（FTIR）和拉曼光谱。使用现场发射扫描电子显微镜（FESEM）和场发射透射电子显微镜（胎动）记录纳米复合材料的表面分析。传感器在玻璃基板上显影，其中银和MWCNT-SH / S-AUNP分别用作接触电极和感测材料。观察到传感器的响应在10mg / d1至60mg / dl的范围内，具有高灵敏度和0.48mg / d1的检测限。该传感器已经表现出几乎稳定的性能，具有出色的再现性。评估发育的传感器以检测原料样品中的尿素，其中传感器可以在牛奶样品中回收尿素在85.17％和88.73％之间。该拟议的传感器有可能用于家庭和乳制品行业的牛奶质量评估。

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