Figure 7From: Synthesis of colloidal solutions with silicon nanocrystals from porous siliconUV–vis transmittance spectra of C-Si-nc suspensions and derivative of transmittance spectra to obtain optical bandgap. (a) Colloidal suspension with methanol as solvent. (b) Colloidal suspension with solvent ethanol as solvent. (c and d) Colloidal suspension with acetone as solvent.Back to article page