Synthesis and upconversion luminescence of N-doped graphene quantum dots

Li, Ming; Wu, Wenbin; Ren, Wencai; Cheng, Hui‐Ming; Tang, Nujiang; Wang, Zhong; Du, Youwei

doi:10.1063/1.4750065

Cited by 180 publications

(144 citation statements)

References 27 publications

Supporting

Mentioning

139

Contrasting

Unclassified

Order By: Relevance

“…The PL spectrum can be regarded as a transition from LUMO to HOMO. That is, when the electrons of the orbital are excited, the electrons transition to the LUMO, and then the electrons go back to a low-energy state [27]. As is known, this is caused by the carbene ground-state multiplicity to the energy levels of and orbitals, which is related to the energy difference ( ) between the and orbitals [28].…”

Section: Resultsmentioning

confidence: 99%

Tuning the Photoluminescence of Graphene Quantum Dots by Fluorination

Luo

et al. 2017

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

Fluorinated graphene quantum dots (F-GQDs) were prepared by mixing GQDs and XeF 2 in a facile gaseous phase heating method. The F-GQDs with excellent water solubility have a F/C atomic ratio of 84.25% and a diameter of 2-6 nm. The photoluminescence (PL) properties of GQDs and F-GQDs were investigated systematically. The results showed that the PL emission of the F-GQDs exhibited an obvious blue-shift of 90 nm compared to that of the GQDs.

show abstract

Section: Resultsmentioning

confidence: 99%

Tuning the Photoluminescence of Graphene Quantum Dots by Fluorination

Luo

et al. 2017

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Up to now, many CDs prepared by different methods have been claimed to have the UCL properties, and applied in many fields such as bioimaging and analytical detection [14,54,136,177,190,195,[203][204][205]. However, Tan and coworkers argued that the so-called UCL of CDs under excitation of a xenon lamp should be artificial [206].…”

Section: Upconversion Luminescencementioning

confidence: 95%

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Dong

Jian-Hua

Chi

2016

Carbon Nanoparticles and Nanostructures

View full text Add to dashboard Cite

Carbon based dots (CDs) composed of sp 2 carbon structures and surface functional groups are a new kind of carbon nanomaterials, exhibiting unique luminescent properties due to the quantum confinement and edge effects. This chapter introduces CDs in detail from their synthetic strategies, morphological and structural characteristics, luminescent properties and mechanisms, and sensing applications. The synthesis methods are summarized as "top-down" and "bottomup" approaches. Luminescent properties discussed include photoluminescence, upconversion luminescence, chemiluminescence, electrochemiluminescence. Sensing applications mainly refer to the chemical and biological sensors based on the luminescent properties of CDs. This chapter provides an overview of the research field and gives future perspectives for developing the exciting materials.

show abstract

“…multistep method and one-step method. Multistep methods usually require the synthesis of graphene oxide (GO), reduced GO (rGO), or GQDs first, and then nitrogen doping is performed by electrochemical generation [8], hydrothermal methods [12,13,[15][16][17][18], or high-temperature treatment [11]. Some of these methods need further chemical tailoring to cut nitrogen-doped graphene into NGQDs [11,18].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast ammonia-driven, microwave-assisted synthesis of nitrogen-doped graphene quantum dots and their optical properties

et al. 2016

View full text Add to dashboard Cite

Abstract:For the first time, a facile, ultrafast, ammoniadriven microwave-assisted synthesis of high-quality nitrogen-doped graphene quantum dots (NGQDs) at room temperature and atmospheric pressure is presented. This one-step method is very cheap, environment friendly, and suitable for large-scale production. The as-synthesized NGQDs consisting of one to three graphene monolayers exhibit highly crystalline quality with an average size of 5.3 nm. A new fluorescence (FL) emission peak at 390 nm is observed, which might be attributed to the doped nitrogen atoms into the GQDs. An interesting red-shift is observed by comparing the FL excitation spectra to the UV-visible absorption spectra. Based on the optical properties, the detailed Jablonski diagram representing the energy level structure of NGQDs is derived.

show abstract

Synthesis and upconversion luminescence of N-doped graphene quantum dots

Cited by 180 publications

References 27 publications

Tuning the Photoluminescence of Graphene Quantum Dots by Fluorination

Tuning the Photoluminescence of Graphene Quantum Dots by Fluorination

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Ultrafast ammonia-driven, microwave-assisted synthesis of nitrogen-doped graphene quantum dots and their optical properties

Contact Info

Product

Resources

About