期刊
APPLIED SURFACE SCIENCE
卷 537, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147853
关键词
Surface-enhanced Raman scattering; Zeolitic imidazolate framework; Flower-like ZIF-8/Ag; Organic dyes
类别
资金
- National Natural Science Foundation of China [51779065]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2019DX11]
A novel zeolitic imidazolate framework-8 (ZIF-8)/Ag nanoparticles composite with flower-like architecture was successfully synthesized, achieving picomolar detections and high reproducibility through the synergy effects of preconcentration and plasmonic hot spot.
The performance of surface-enhanced Raman scattering (SERS) active substrates highly depends on its structure and components. Herein, for the first time, a novel zeolitic imidazolate framework-8 (ZIF-8)/Ag nanoparticles composite with flower-like architecture is demonstrated. By using tannic acid as structure-directing agent, well-controlled flower-like ZIF-8 could be obtained. Through in-situ reduction, Ag nanoparticles with uniform grain distribution were directly grown on the surface of ZIF-8 nanosheets. The synergy effects of preconcentration and plasmonic hot spot allow the picomolar detections and high reproducibility of the SERS method. As a result, the minimum detection limit of rhodamine 6G can be as 10(-14) mol L-1 and the stability and repeatability are satisfactory. This work provides a facile and general method to develop plasmonic ZIF-8 hybrid with controlled morphology for potential applications in bioanalysis, chemical sensing and catalysis.
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