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. 2019 Jun 14;6(14):1900855. doi: 10.1002/advs.201900855

Figure 5.

Figure 5

A) Hydrothermal reduction of GO nanosheets into blue luminescent graphene QDs. a) Mechanism for the hydrothermal cutting of GO into GQDs. b) Models of the GQDs in acidic (right) and alkali (left) media. c) Typical electronic transitions of triple carbenes at zigzag sites. Reproduced with permission.70 Copyright 2010, Wiley‐VCH. B) Optically tunable amino‐functionalized graphene QDs. a) Emission images of the obtained GQDs (upper) and GQD@polymer hybrids (bottom) under irradiation with a 365 nm UV lamp. b) PL and selected UV–vis absorption spectra of the obtained GQDs. Reproduced with permission.73 Copyright 2012, Wiley‐VCH. C) Scheme for preparation of GQDs and GQDs–NHR from GO. Reproduced with permission.[qv: 74a] Copyright 2013, American Chemical Society.