期刊
NANO LETTERS
卷 20, 期 10, 页码 7304-7312出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02683
关键词
sensors; surface-enhanced Raman scattering; analyte enrichment; quantitative detection; slippery surfaces
类别
资金
- National Key Research and Development Program of China [2018YFB0703803]
- Zhejiang Provincial Natural Science Foundation of China [LR19E010001]
- National Science Foundation of China [51702283, 51971200]
- Postdoctoral Science Foundation of Zhejiang [512200X81902]
Surface-enhanced Raman scattering (SERS) technique with naturally born analyte identification capability can achieve ultrahigh sensitivity. However, the sensitivity and quantification capability of SERS are assumed to be mutually exclusive. Here, we prohibit the formation of the ultrasensitive SERS sites to achieve a high quantification capability through separating the gold (Au) nanorods from approaching each other with thick metal organic framework (MOF) shells. The sensitivity decrease caused by the absence of the ultrasensitive SERS sites is compensated by the analyte enrichment function of a slippery surface. The porous MOF shell around the Au nanorod only allows analytes smaller than the pore size to approach the Au nanorods and contribute to the SERS spectrum within the complex sample, greatly enhancing the analyte identification capability. Overall, we have demonstrated an integrated SERS platform with analyte enrichment and analyte filtration function, realizing sensitive, quantitative, and size selective analyte identification in complex environments.
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