• 文献标题:   N-doped graphene quantum dots from graphene oxide and dendrimer and application in photothermal therapy: An experimental and theoretical study
  • 文献类型:   Article
  • 作  者:   SHEINI A, TAHERPOUR A, MAGHSUDI M, FARAJMANDAMIRABADI S, KOUCHAK M, RAHBAR N, SABAEIAN M, ALIDADI H
  • 作者关键词:   nitrogendoped graphene quantum dot, graphene oxide, g0 pamam, photothermal efficiency, quantum mechanical method
  • 出版物名称:   COLLOIDS SURFACES APHYSICOCHEMICAL ENGINEERING ASPECTS
  • ISSN:   0927-7757 EI 1873-4359
  • 通讯作者地址:  
  • 被引频次:   4
  • DOI:   10.1016/j.colsurfa.2021.128066 EA DEC 2021
  • 出版年:   2022

▎ 摘  要

The present study was conducted to synthesize nitrogen-doped graphene quantum dots (N-GQDs) through amidative/oxidative cutting of graphene oxide using H2O2 and G0 PAMAM dendrimer as oxidizing and amidative agents, respectively. G0 PAMAM dendrimer, as a multiamine, was utilized for doping N into GQDs and passivation of the active surface of GQDs to obtain N-doped GQDs and amine-modified GQDs. The N-GQDs exhibited a broad absorption band from the visible to the first near infra-red (NIR) region with a photoluminescence. Interestingly, the prepared the N-GQDs exhibited reasonable photothermal conversion efficiency (eta = 53.45% upon 808 nm laser irradiation). The structures of N-GQDs were investigated by a series characterization method. Moreover, a theoretical study was carried out employing quantum mechanical (QM) method on the structures of the designed graphene oxide and N-GQDs profiles to obtain the energy gap. Subsequently, the absorption and photoluminescence mechanisms of the N-GQDs were proposed. Following the evaluation of biocompatibility, the N-GQDs were evaluated to their photothermal application.