Fig. 1: Raman thermometry and PL quenching during laser reduction of GO. | Nature Communications

Fig. 1: Raman thermometry and PL quenching during laser reduction of GO.

From: Photochemistry dominates over photothermal effects in the laser-induced reduction of graphene oxide by visible light

Fig. 1

a Sketch of the laser-reduction experiment of GO film mixed with SiNWs on ITO/glass substrate with different wavelengths and laser powers. b Raman spectra of GO film under different laser excitation wavelengths at constant powers below 10 µW with D and G Raman peaks marked c Non-linear decay of PL peak area (Integrated intensity) versus applied laser power for 532 nm laser. The solid line is a fit given by an exponential decay function \(y={y}_{0}-{A}_{1}{{{{\rm{e}}}}}^{-x/{t}_{1}}\). The inset with raw data demonstrates the power-dependent Raman spectra used for the integrated intensity calculation. d Si NW Raman peak shift is driven by the photothermal effect (532 nm laser) in GO/SiNWs film. The temperatures achieved at each laser power are specified. Source data are provided as a Source Data file.

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