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(a) Comparison of MIP, NIP and simple Ag film-based SPR sensor in terms of shift in resonance wavelength with varying concentration of ascorbic acid from 10−8–10−4 M. Reprinted with permission from [166]. Copyright 2015 Springer; (b) Schematic diagram of the FO-LSPR + SPR-based PANI-Ag MIP probe; (c) the absorbance spectra and (d) shift in peak absorbance wavelength for the corresponding probe. Reprinted with permission from [66] Copyright 2016 Institute of Physics.
