Fig. 3: Effect of the methyl groups on the structures of CPDs.
From: Confined-domain crosslink-enhanced emission effect in carbonized polymer dots
a UV–vis absorption spectral profiles. b FTIR spectral profiles. c XPS spectral profiles. d XRD patterns. e Schematic of the relationship between the methyl groups and the internal structure of CPDs (d1: the spacing of the original skeleton inside CPDs without methyl groups. d2: the spacing of the stretched skeleton inside CPDs by methyl groups. D1: average skeleton spacing of CPDsCH3-1. D2: average skeleton spacing of CPDsCH3-2. D3: average skeleton spacing of CPDsCH3-3)
