Sensing with complex core-shell nanoparticles.
(A) Absorbance spectra of Cu@CuO core-shell nanoparticles under air and various CO gas concentrations. (B) LSPR absorbance (left) and LSPR wavelength (right) versus CO concentration (A–B reprinted with permission from . Copyright 2011 American Chemical Society). (C) TEM image of starch-stabilized silver nanoparticles for hydrogen peroxide detection. (D) Absorbance spectra of the Ag nanoparticle solution 15 min after the addition of hydrogen peroxide solution for different H2 O2 concentrations (C–D reprinted from , with permission from Elsevier). (E) TEM image of polyvinylpyrrolidone-coated silver nanoparticles in water. (F) Absorbance at resonance over time after the addition of 1 mm hydrogen peroxide (E–F reprinted from , with permission from Elsevier).