title: Photoluminescence-tunable carbon nanodots: surface-state energy-gap tuning.
abstract: The photoluminescence of carbon nanodots (C-dots) can be tuned by changing their surface chemistry or size because the photoluminescence is a function of the surface-state electronic transitions. Increasing the degree of surface oxidation leads to a narrowing of the energy gap of the surface; meanwhile, larger C-dots with an extensive π-electron system, which can couple with surface electronic states, can also lead to a narrowing of the energy gap of the surface states.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, the Institute for Advanced Studies and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Bao
authors.forename: Cui
authors.initials: C
authors.lastname: Liu
authors.forename: Zhi-Ling
authors.initials: ZL
authors.lastname: Zhang
authors.forename: Dai-Wen
authors.initials: DW
authors.lastname: Pang
mesh_terms: D000818:Animals; D002244:Carbon / Q000737:chemistry*; D017115:Catheter Ablation; D002522:Chlorocebus aethiops; D049449:Luminescence; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D017942:Nitric Acid / Q000737:chemistry; D010084:Oxidation-Reduction; D045663:Quantum Dots / Q000737:chemistry*; D013057:Spectrum Analysis; D013499:Surface Properties; D014709:Vero Cells; D014961:X-Ray Diffraction
chemical_list: D017942:Nitric Acid; D002244:Carbon
keywords: bio-imaging; carbon; fluorescence; mechanisms; nanoparticles