Journal
MICROCHIMICA ACTA
Volume 185, Issue 4, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-018-2772-z
Keywords
Core-shell system; Chemical enhancement; Electromagnetic enhancement; Endocrine-disrupting chemicals; Molecular imprinting
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Funding
- National Natural Science Foundation of China [51579057, 51379052]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2016DX07]
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An efficient approach is demonstrated for preparing particles consisting of a silver core and a shell of molecularly imprinted polymer (Ag@MIP). The MIP is prepared by using bisphenol A (BPA) as the template and 4-vinylpyridine as the functional monomer. The Ag@MIP fulfills a dual function in that the silver core acts as a SERS substrate, while the MIP allows for selective recognition of BPA. The Ag@MIP is characterized by scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, thermogravimetric analysis and Raman spectroscopy. The Raman intensity of Ag@MIP is higher than that of bare silver microspheres. The detection limit for BPA is as low as 10(-9) mol.L-1.
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