Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62009
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dc.contributorDepartment of Applied Physics-
dc.creatorQian, F-
dc.creatorLi, X-
dc.creatorTang, L-
dc.creatorLai, SK-
dc.creatorLu, C-
dc.creatorLau, SP-
dc.date.accessioned2016-12-19T08:58:10Z-
dc.date.available2016-12-19T08:58:10Z-
dc.identifier.issn2158-3226 (online)-
dc.identifier.urihttp://hdl.handle.net/10397/62009-
dc.language.isoenen_US
dc.publisherAmerican Institute of Physicsen_US
dc.rights© 2016 Author(s).All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.rightsThe following publication F. Qian et al., AIP Advances 6, 075116 (2016) is available at https://dx.doi.org/10.1063/1.4959906en_US
dc.titlePotassium doping : tuning the optical properties of graphene quantum dotsen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.volume6-
dc.identifier.issue7-
dc.identifier.doi10.1063/1.4959906-
dcterms.abstractDoping with hetero-atoms is an effective way to tune the properties of graphene quantum dots (GQDs). Here, potassium-doped GQDs (K-GQDs) are synthesized by a one-pot hydrothermal treatment of sucrose and potassium hydroxide solution. Optical properties of the GQDs are altered as a result of K-doping. The absorption peaks exhibit a blue shift. Multiple photoluminescence (PL) peaks are observed as the excitation wavelength is varied from 380 nm to 620 nm. New energy levels are introduced into the K-GQDs and provide alternative electron transition pathways. The maximum PL intensity of the K-GQDs is obtained at an excitation wavelength of 480 nm which is distinct from the undoped GQDs (375 nm). The strong PL of the K-GQDs at the longer emission wavelengths is expected to make K-GQDs more suitable for bioimaging and optoelectronic applications.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationAIP advances, 2016, v. 6, no. 7, 75116, p. 075116-1-075116-8-
dcterms.isPartOfAIP advances-
dcterms.issued2016-
dc.identifier.isiWOS:000382403600041-
dc.identifier.scopus2-s2.0-84979788616-
dc.identifier.ros2016005786-
dc.identifier.rosgroupid2016005533-
dc.description.ros2016-2017 > Academic research: refereed > Publication in refereed journal-
dc.description.validate201804_a bcma-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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