| Deep Ultraviolet Photoluminescence of Water-Soluble Self-Passivated Graphene Quantum Dots. | |
| | |
MedLine Citation:
|
PMID: 22559247 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Glucose-derived water-soluble crystalline graphene quantum dots (GQDs) with average diameter as small as 1.65 nm (~5 layers) were prepared by a facile hydrothermal-assisted microwave pyrolysis method. The GQDs exhibits deep ultraviolet (DUV) emission of 4.1 eV, which is the shortest emission wavelength among all the solution-based QDs. The GQDs exhibit typical excitation wavelength dependent properties as expected in carbon-based quantum dots. However, the emission wavelength is independent of the size of the GQDs. The unique optical properties of the GQDs are attributed to the self-passivated layer on the surface of the GQDs as revealed by electron energy loss spectroscopy. The photoluminescence quantum yield of the GQDs was determined to be 7 - 11%. The GQDs are capable of converting blue light into white light when the GQDs are coated onto a blue light emitting diode. |
| | |
Authors:
|
Libin Tang; Rongbin Ji; Xiangke Cao; Jingyu Lin; Hongxing Jiang; Xueming Li; Kar Seng Teng; Chi Man Luk; Songjun Zeng; Jianhua Hao; Shu-Ping Lau |
Related Documents
:
|
20582787 - Hekla cold springs (iceland): groundwater mixing with magmatic gases. 7736287 - Multiple laboratory comparison of the doubly labeled water technique. 15185137 - Deuterium stable isotope ratios as tracers of water resource use: an experimental test ... 20870317 - Distribution of uranium isotopes in surface water of the llobregat river basin (northea... 16522057 - Distance-dependent fluorescence quenching on gold nanoparticles ensheathed with layer-b... 16613467 - Chain orientation and headgroup structure in langmuir monolayers of stearic acid and me... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-5-5 |
Journal Detail:
|
Title: ACS nano Volume: - ISSN: 1936-086X ISO Abbreviation: - Publication Date: 2012 May |
Date Detail:
|
Created Date: 2012-5-7 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101313589 Medline TA: ACS Nano Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Combinatorial development of novel Pd based mixed oxide catalysts for the CO hydrogenation to methan...
Next Document: Determination of fluoride concentration in powdered milk in Iran 2010.