材料科学
拉曼散射
吸附
胶体金
纳米纤维
纤维素
纳米颗粒
基质(水族馆)
化学工程
纳米技术
拉曼光谱
有机化学
化学
物理
工程类
光学
海洋学
地质学
作者
Dewen Xu,Dewen Xu,Wei Su,Yinlong Luo,Zhenfeng Wang,Cheng Yin,Bingyan Chen,Yunhai Zhang
标识
DOI:10.1021/acsami.4c03255
摘要
Cellulose nanofiber (CNF) holds great promise in applications such as surface-enhanced Raman scattering (SERS), catalysis, esthesia, and detection. This study aimed to build novel CNF-based SERS substrates through a facile synthetic method. Citrate-reduced gold nanoparticles (AuNPs) were adsorbed on the cationized CNF surface due to electrostatic interactions, and uniform AuNPs@(2,3-epoxypropyl trimethylammonium chloride)EPTMAC@CNF flexible SERS substrates were prepared by a simple vacuum-assisted filtration method. The probe molecule methylene blue was chosen to assess the performance of the CNF-based SERS substrate with a sensitivity up to 10–9 M, superior signal reproducibility (relative standard deviation (RSD) = 4.67%), and storage stability (more than 30 days). Tensile strength tests indicated that the CNF-based films had good mechanical properties. In addition, CNF-based substrates can easily capture and visually identify microplastics in water. These results demonstrate the potential application of the flexible, self-assembled AuNPs@EPTMAC@CNF flexible SERS substrate for prompt and sensitive detection of trace substances.
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