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Войти в исследования Analytica chimica acta · 2025
MXene-supported AgNPs in smart hydrogels: Shrink-enabled amplification for high-performance multi-channel SERS sensing.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Li Jiawei, Lai Wei, Tan Mingsheng, Guo Mengdi
Аннотация
BACKGROUND: With the advancement of technology and growing health concerns, high sensitivity, flexibility, and multi-channel detection have become crucial indicators for wearable intelligent sensors.
RESULTS: Inspired by the volume contraction of hydrogels upon ethanol exposure, a strategy combining MXene with in situ reduction of silver nanoparticles has been used to construct a three-dimensional, high-sensitivity SERS substrate (MX-SNP PAH-based SERS substrate). This design not only enriches target molecules but also enables dual enhancement of charge transfer and electromagnetic enhancement by inducing inter-particle spacing between silver nanoparticles and V2CTx. The developed SERS substrate allows for the quantitative analysis of pesticide molecules (thiram, 1 nM), small molecules such as p-mercaptobenzoic acid (pMBA, 1 nM), and microplastics like polystyrene (PS, 6.25 μg mL-1). Additionally, by analyzing the sweat SERS spectra, it was possible to successfully quantify blood glucose levels (4.5 mM).
SIGNIFICANCE: This innovative MX-SNP PAH-based SERS substrate design provides valuable insights for the development of flexible wearable sensors, with significant application potential in food safety, water quality analysis, and health monitoring.
RESULTS: Inspired by the volume contraction of hydrogels upon ethanol exposure, a strategy combining MXene with in situ reduction of silver nanoparticles has been used to construct a three-dimensional, high-sensitivity SERS substrate (MX-SNP PAH-based SERS substrate). This design not only enriches target molecules but also enables dual enhancement of charge transfer and electromagnetic enhancement by inducing inter-particle spacing between silver nanoparticles and V2CTx. The developed SERS substrate allows for the quantitative analysis of pesticide molecules (thiram, 1 nM), small molecules such as p-mercaptobenzoic acid (pMBA, 1 nM), and microplastics like polystyrene (PS, 6.25 μg mL-1). Additionally, by analyzing the sweat SERS spectra, it was possible to successfully quantify blood glucose levels (4.5 mM).
SIGNIFICANCE: This innovative MX-SNP PAH-based SERS substrate design provides valuable insights for the development of flexible wearable sensors, with significant application potential in food safety, water quality analysis, and health monitoring.