FTIR spectra of GO membranes after low-temperature annealing for 0 to 8 days, showing the relative changes of oxygen functionalities.

Abstract

<p>The plots in (b) show the transmittance changes of the bands assigned to C = O (∼1730 cm⁻¹) and C-OH (∼3400 cm⁻¹) during mild annealing.</p