Nearly monodisperse graphene quantum dots fabricated by amine-assisted cutting and ultrafiltration.

TitleNearly monodisperse graphene quantum dots fabricated by amine-assisted cutting and ultrafiltration.
Publication TypeJournal Article
Year of Publication2013
AuthorsXue Q, Huang H, Wang L, Chen Z, Wu M, Li Z, Pan D
JournalNanoscale
Volume5
Issue24
Pagination12098-103
Date Published2013 Nov 21
Abstract

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.

DOI10.1371/journal.pntd.0002484
Alternate JournalNanoscale