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Nearly monodisperse graphene quantum dots fabricated by amine-assisted cutting and ultrafiltration.
|Title||Nearly monodisperse graphene quantum dots fabricated by amine-assisted cutting and ultrafiltration.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Xue Q, Huang H, Wang L, Chen Z, Wu M, Li Z, Pan D|
|Date Published||2013 Nov 21|
We report a novel procedure involving polyethylenimine-assisted hydrothermal cutting and subsequent ultrafiltration for fabricating nearly monodisperse graphene quantum dots with a uniform lateral size and confined layer number. The isolated monolayer quantum dots exhibit a sharp band-edge absorption feature and strong photoluminescence (quantum yield of 21%) independent of excitation wavelength and pH. Their preliminary application in bioimaging has been demonstrated.