期刊
TALANTA
卷 191, 期 -, 页码 241-247出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.08.067
关键词
Surface enhanced Raman scattering; Three-dimensional substrate; Chitosan; Dual-use
资金
- National Natural Science Foundation of China, China [21677117, 51573217]
- Fundamental Research Funding of Sichuan Province, China [2018JY0359]
Here, we report a dual-use surface-enhanced Raman scattering (SERS) substrate based on a flexible three-dimensional (3D) chitosan foam, onto which silver nanoparticles (Ag NPs) are firmly immobilized through amino groups from chitosan chains. The SERS substrate can actively collect analytes either on solid surface by swabbing or in solution by adsorption. The compressible characteristic of chitosan foam enables easy removal of solvent through gentle pressing, which can achieve fast pre-concentrating of analytes before measurements. In addition, the substrate is shape adaptable and thus is suitable for sampling contaminants on solid surfaces. The SERS substrates exhibit acceptable reproducibility (16.4% in relative standard deviation). Furthermore, it detects Raman probe Nile Blue A down to 5 pg by swabbing solid surface and Rhodamine 6G down to 10 ppb by adsorbing analyte in the solution. Three pesticide samples (triazophos, methidathion, and isocarbophos) can also be detected down to pig level with the substrate. It is believed that such a versatile SERS substrate may find great opportunity in realistic sensing applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据