SnO2 electrolyte-gated thin film transistor for highly sensitive pH detection of beverages

IF 9.8 1区农林科学 Q1 CHEMISTRY, APPLIED Food Chemistry Pub Date : 2025-03-20 DOI:10.1016/j.foodchem.2025.143868

Ruling Wang , Zhiwei Cai , Yaxing Zhang , Runan Tan , Lei Wang , Hanping He , Yunbin He , Gang Chang

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Abstract

The pH value is a crucial indicator of the acidity or alkalinity of beverages, directly influencing taste, flavor, shelf life, and consumer health, making pH detection essential in the field of food safety. To enable precise pH monitoring, a SnO₂-based electrolyte-gated thin-film transistor (EGTFT) pH sensor was developed via a low-cost sol-gel process. Experimental results demonstrated that the device operated at a low voltage (0.5 V) and exhibited high sensitivity (78.99 mV·pH ⁻¹) beyond the Nernst limit. The superior stability and corrosion resistance of the SnO₂ sensitive layer enabled the sensor to maintain current within 97 % of its original value during 14 days of long-term stability test. The actual measurements of pH levels in beverages have demonstrated high accuracy, indicating that the SnO₂-EGTFT pH sensor can serve as an excellent platform for highly sensitive and stable pH detection in the food industry.

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用于饮料高灵敏度pH检测的SnO2电解门控薄膜晶体管

pH值是表征饮料酸度或碱度的重要指标，直接影响饮料的口感、风味、保质期和消费者健康，因此pH值检测在食品安全领域至关重要。为了实现精确的pH监测，通过低成本的溶胶-凝胶工艺开发了基于SnO₂的电解质门控薄膜晶体管（EGTFT） pH传感器。实验结果表明，该装置工作在低电压（0.5 V）下，灵敏度高达78.99 mV·pH −1，超出了Nernst极限。SnO2敏感层优越的稳定性和耐腐蚀性使传感器在14 天的长期稳定性测试中保持电流在原始值的97% %以内。对饮料中pH值的实际测量显示出很高的准确性，表明SnO2-EGTFT pH传感器可以作为食品工业中高度敏感和稳定的pH检测的优秀平台。

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文献相关原料

公司名称

产品信息

阿拉丁

SnCl2

阿拉丁

C3H8O2

阿拉丁

CH3OCH3

来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.