Yang Qing, Pang Yuanwen, Li Hong, Di Lanbo
College of Physical Science and Technology, Dalian University, Dalian 116622, China.
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian 116024, China.
Materials (Basel). 2025 Jun 28;18(13):3076. doi: 10.3390/ma18133076.
In this study, a simple, mild, and eco-friendly cold plasma-solution interaction method is employed to rapidly prepare gold colloids. Through modification with multi-walled carbon nanotubes (MWCNTs), a non-enzymatic glucose-sensing electrode material is successfully fabricated. The prepared electrode material is characterized via X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The results show that compared with the chemically reduced AuNPs-C-MWCNTs, the plasma-prepared AuNPs-P-MWCNTs exhibits enhanced glucose catalytic performance with a higher sensitivity of 73 μA·mM·cm (approximately 3.2 times that of AuNPs-C-MWCNTs), lower response time of 2.1 s, and ultra-low detection limit of 0.21 μM. It also demonstrates excellent selectivity, reproducibility (RSD = 4.37%), repeatability (RSD = 3.67%), and operational stability (RSD = 4.51%). This improvement can be attributed to the smaller particle size and better dispersion of plasma-derived AuNPs on the surface of MWCNTs. Furthermore, the AuNPs-P-MWCNTs surface is enriched with oxygen-containing functional groups, which is conducive to the enhancement of the hydrophilicity of the electrode surface. These synergistic effects facilitate the AuNPs-catalyzed glucose oxidation reaction, ultimately leading to superior glucose catalytic performance.
在本研究中，采用一种简单、温和且环保的冷等离子体-溶液相互作用方法快速制备金胶体。通过用多壁碳纳米管（MWCNTs）进行修饰，成功制备了一种非酶葡萄糖传感电极材料。通过X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和透射电子显微镜（TEM）对制备的电极材料进行了表征。结果表明，与化学还原的AuNPs-C-MWCNTs相比，等离子体制备的AuNPs-P-MWCNTs表现出增强的葡萄糖催化性能，灵敏度更高，为73 μA·mM·cm（约为AuNPs-C-MWCNTs的3.2倍），响应时间更短，为2.1 s，检测限超低，为0.21 μM。它还表现出优异的选择性、重现性（RSD = 4.37%）、重复性（RSD = 3.67%）和操作稳定性（RSD = 4.51%）。这种改进可归因于等离子体衍生的AuNPs在MWCNTs表面的粒径更小且分散性更好。此外，AuNPs-P-MWCNTs表面富含含氧官能团，这有利于增强电极表面的亲水性。这些协同效应促进了AuNPs催化的葡萄糖氧化反应，最终导致优异的葡萄糖催化性能。
