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(A) UV–vis spectra of Au-SiNW nanohybrids at different concentrations varying from 0.200, 0.150, 0.100, 0.0750, 0.0500, 0.0375, 0.0250, 0.0125, to 0.00625 mg/mL (a–i). (B) Linear relationship between concentration of Au-SiNW nanohybrids and its absorbance at 808 nm. (C) UV–vis spectra of different concentrations of pure SiNWs changing from 1.00, 0.800, 0.500, 0.250, 0.125, 0.100, to 0.0625 mg/mL (a–g).
