A flexible and wearable paper-based chemiresistive sensor modified with SWCNTs-PdNPs-polystyrene microspheres composite for the sensitive detection of ethylene gas: A new method for the determination of fruit ripeness and corruption

IF 6 2区 化学 Q1 CHEMISTRY, ANALYTICAL
Hanlong Yan , Guo Zhao , Wei Lu , Can Hu , Xiaochan Wang , Gang Liu , Ning Shi , Nguyen Thi Dieu Thuy , Litao Zhang
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引用次数: 1

Abstract

This study developed a flexible and wearable paper-based chemoresistive sensor (FWPCS) by modifying a SWCNT-PdNP-polystyrene microsphere (SPPM) composite (SPPM/FWPCS) for the low-cost and online determination of fruit ripeness and corruption. A new method for the batch and low-cost fabrication of SPPM/FWPCSs based on laser direct writing was proposed. The sensing mechanism of FWPCS relies on the electron depletion layer in the sensing composite created by the Schottky barriers among SWCNTs, PdNPs, and the adsorbed oxygen, along with the construction of O2. When the SPPM sensing film is exposed to ethylene, trapped electrons are released into the conduction band through oxidation and cleavage of ethylene, causing a decrease in resistance. The properties and morphology of the synthesized SPPM composite were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. Additionally, the key parameters for the fabrication of SPPMs/FWPCS related to the sensing performance were optimized. The concentration of C2H4 can be detected down to 100 ppb using the SPPMs/FWPCS at 25 °C. Finally, the real-time determination of banana ripeness and corruption verified the feasibility of the sensor, indicating that the SPPMs/FWPCS has prospects in monitoring fruit ripeness and corruption during storage and transportation.

Abstract Image

用swcnts - pdnps -聚苯乙烯微球复合材料修饰的柔性可穿戴纸基化学传感器,用于灵敏检测乙烯气体:一种测定水果成熟度和腐败度的新方法
本研究通过对swcnts - pdnp -聚苯乙烯微球(SPPM)复合材料(SPPM/FWPCS)进行改性,开发了一种柔性、可穿戴的纸基化学电阻传感器(FWPCS),用于低成本、在线测定水果成熟度和腐败度。提出了一种基于激光直接写入的大批量低成本制备SPPM/FWPCSs的新方法。FWPCS的传感机制依赖于SWCNTs、PdNPs和吸附氧之间的Schottky势垒形成的传感复合材料中的电子耗尽层,以及O2−的构建。当SPPM传感膜暴露于乙烯时,捕获的电子通过乙烯的氧化和解理被释放到导带中,导致电阻降低。采用x射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和拉曼光谱对合成的SPPM复合材料的性能和形貌进行了研究。此外,还对影响sppm /FWPCS传感性能的关键参数进行了优化。在25°C下,使用sppm /FWPCS可以检测到低至100 ppb的C2H4浓度。最后,通过对香蕉成熟度和腐败度的实时测定,验证了该传感器的可行性,表明sppm /FWPCS在监测水果储运过程中的成熟度和腐败度方面具有广阔的应用前景。
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来源期刊
Analytica Chimica Acta
Analytica Chimica Acta 化学-分析化学
CiteScore
10.40
自引率
6.50%
发文量
1081
审稿时长
38 days
期刊介绍: Analytica Chimica Acta has an open access mirror journal Analytica Chimica Acta: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Analytica Chimica Acta provides a forum for the rapid publication of original research, and critical, comprehensive reviews dealing with all aspects of fundamental and applied modern analytical chemistry. The journal welcomes the submission of research papers which report studies concerning the development of new and significant analytical methodologies. In determining the suitability of submitted articles for publication, particular scrutiny will be placed on the degree of novelty and impact of the research and the extent to which it adds to the existing body of knowledge in analytical chemistry.
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