Fig. 2
From: Colloidal quantum dots for thermal infrared sensing and imaging
(Images reproduced with permission from ref. [18]. Copyright 2006 by American Chemical Society)
Aqueous synthesis and characterization of HgTe CQDs. a Low resolution TEM images showing 8Â nm HgTe CQDs and b, c HRTEM images of an individual HgTe CQD. d Absorbance and e PL data for HgTe CQDs with sizes varying from 3 to 10Â nm. As size increases, the absorbance edge pushes to lower energy. For the 10Â nm particles, the absorbance and PL cross into the MWIR regime. The sharp peak at 0.35Â eV is attributed to ligand absorption