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. 2017 Oct 6;17(10):2277. doi: 10.3390/s17102277

Figure 9.

Figure 9

(a) SPR reflectivity and (b) Shift in SPR angle of the Au/Ag/Au/CS–GO SPR sensor in 1 ppm of Pb2+, Hg2+, Cu2+, Zn2+ and Cr3+.