Selective engineering of oxygen-containing functional groups using alkyl ligand of oleylamine for revealing luminescence mechanism of graphene oxide quantum dots

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 188
  • Download : 0
Oxygen-containing functional groups such as epoxy, hydroxyl, carboxylic, and carboxyl groups have a great influence on the luminescence properties of graphene oxide quantum dots (GOQDs). Understanding their roles is essential for the design and optimization of GOQD performance. Herein, we investigate the effect of epoxide functional groups in GOQDs on the luminescence mechanism through passivation of the epoxide functional groups using the alkyl ligand oleylamine. Luminescence in the assynthesized GOQDs has two separate origins: intrinsic states derived from localized sp2 carbon subdomains and extrinsic states formed by oxygen-functional groups. When the oleylamine ligand is conjugated on the GOQDs, intrinsic PL emission from the localized sp2 carbon subdomains decreases. This is discussed in detail, based on optical characterization and first-principles density functional theory calculations, which reveal that the role of the epoxide functional groups is to form localized sp2 carbon subdomains emitting intrinsic PL. To the best of our knowledge, this is the first investigation of the role of epoxide functional groups on the luminescence mechanism in GOQDs.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2017-11
Language
English
Article Type
Article
Keywords

CARBON; PHOTOLUMINESCENCE; ENERGY; REDUCTION; ORIGIN; ELECTROLUMINESCENCE; SURFACTANTS; PARTICLES; OXIDATION; GRAPHITE

Citation

NANOSCALE, v.9, no.47, pp.18635 - 18643

ISSN
2040-3364
DOI
10.1039/c7nr04150k
URI
http://hdl.handle.net/10203/228581
Appears in Collection
CBE-Journal Papers(저널논문)NT-Journal Papers(저널논문)PH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0