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Surface Functionalized Ti3CNTx MXene for Monitoring Sweat pH with Superhydrophobic Protection

文献类型： 外文期刊

作者： Yang, Hui 1 ; Kong, Na 2 ; Judicpa, Mia Angela 4 ; Usman, Ken Aldren S. 4 ; Tao, Jinlong 3 ; Razal, Joselito M. 4 ; Zhang, Jizhen 3 ; Shao, Yanqiu 1 ;

作者机构： 1.Mu Dan Jiang Normal Univ, Coll Chem & Chem Engn, Heilongjiang Key Lab Photoelect Funct Mat, Mudanjiang 157011, Peoples R China

2.Deakin Univ, Ctr Sustainable Bioprod, Sch Life & Environm Sci, Geelong, Vic 3216, Australia

3.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Hainan Prov Key Lab Nat Rubber Proc, Zhanjiang 524001, Peoples R China

4.Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia

5.Natl Inst Mat Sci NIMS, Res Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan

关键词： hydrophobicity; surface functionalization; Ti3CNTx MXene; wearable sensor; sweat pH

期刊名称：ADVANCED MATERIALS INTERFACES （ 影响因子：4.4； 五年影响因子：4.8 ）

ISSN： 2196-7350

年卷期： 2025 年 12 卷 11 期

页码：

收录情况： SCI

摘要： Real-time tracking of metabolites, ions, and biomarkers in sweat using wearable sensors is crucial for advancing point-of-care testing, where improving the stability of these technologies is a major focus. In this research, a compact, highly sensitive, and stable real-time electrochemical sweat sensor capable of monitoring changes in hydrogen ion concentration is developed. By surface functionalizing Ti3CNTx and combining it with a polyaniline film, a small, flexible pH sensor is fabricated to track biochemical reactions by examining sweat pH during exercise and wound healing. The fluorinated alkyl silane-modified surface significantly increases the contact angle, enhancing the sensor's performance. The assembled pH sensor demonstrates pH-sensitivity of -42.91 (pH 11-1) and -40.15 mV pH-(1) (pH 1-11), comparable to transition metal oxide-based sensors. Additionally, it shows good selectivity through continuous addition and separated solution methods. The modified Ti3CNTx exhibited excellent durability in different ionic solutions for over 30 days. The flexible, precise sensor, developed via scalable screen-printing, can be applied in water quality monitoring, food preservation, product processing, biomarker monitoring, and human health.

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