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Green synthesis of ...
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Khachatourian, Malek AdrineKTH,Material- och nanofysik,IUST-Iran University of Science and Technology, Iran
(författare)
Green synthesis of Y2O3:Eu3+ nanocrystals for bioimaging
- Artikel/kapitelEngelska2015
Förlag, utgivningsår, omfång ...
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2015-03-18
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Materials Research Society,2015
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-177238
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177238URI
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https://doi.org/10.1557/opl.2015.293DOI
Kompletterande språkuppgifter
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Språk:engelska
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Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:kon swepub-publicationtype
Anmärkningar
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QC 20151120
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Rare earth (e.g., Eu, Er, Yb, Tm) doped Y2O3 nanocrystals are promising fluorescent bioimaging agents which can overcome well known problems of currently used organic dyes like photobleaching, phototoxicity, and light scattering. Furthermore, the alternative quantum dots (QDs) composed of heavy metals (e.g., CdSe) possess inherently low biocompatibility due to the heavy metal content. In the present work, monodisperse spherical Y2O3:Eu3+ nanocrystals were successfully synthesized by microwave assisted urea precipitation method followed by thermochemical treatment. This is a green, fast and reproducible synthesis method, which is surfactant and hazardous precursors free. The as prepared particles were non-aggregated, spherical particles with a narrow size distribution. The calcined particles have a polycrystalline structure preserving the monodispersity and the spherical morphology of the as prepared particles. After calcination of Y(OH)CO3:Eu3+ precursors at 900°C for 2 hours, a highly crystalline cubic Y2O3 structure was obtained. The Y2O3:Eu3+ spherical particles showed a strong red emission peak at 613nm due to the 5D0-7F2 forced electric dipole transition of Eu3+ ions under UV excitation (235 nm) as revealed by the photoluminescence analysis (PL). The effect of reaction time on size and photoluminescence properties of calcined particles and also the effect of reaction temperature and pressure on the size and the yield of the precipitation process have been studied. The intense red fluorescent emission, excellent stability and potential low toxicity make these QDs promising for applications in bio-related areas such as fluorescence cell imaging or fluorescence bio labels.
Ämnesord och genrebeteckningar
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TEKNIK OCH TEKNOLOGIER Materialteknik hsv//swe
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ENGINEERING AND TECHNOLOGY Materials Engineering hsv//eng
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Biocompatibility
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Calcination
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Electric excitation
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Erbium
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Erbium compounds
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Europium compounds
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Fluorescence
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Heavy metals
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Light scattering
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Nanocrystals
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Photobleaching
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Photoluminescence
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Precipitation (chemical)
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Semiconductor quantum dots
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Spheres
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Thulium
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Urea
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Ytterbium
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Electric dipole transition
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Fluorescent bioimaging
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Narrow size distributions
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Photoluminescence analysis
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Photoluminescence properties
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Polycrystalline structure
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Spherical morphologies
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Thermochemical treatments
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Europium
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Golestani-Fard, F.
(författare)
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Sarpoolaky, H.
(författare)
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Vogt, CarmenKTH,Biomedicinsk fysik och röntgenfysik(Swepub:kth)u1iann4b
(författare)
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Zhao, YichenKTH,Funktionella material, FNM(Swepub:kth)u17os1v7
(författare)
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Toprak, Muhammet S.KTH,Funktionella material, FNM(Swepub:kth)u1u3m5a2
(författare)
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KTHMaterial- och nanofysik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Materials Research Society Symposium Proceedings: Materials Research Society, s. 59-649781510806054
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Ingår i:MRS Proceedings: Materials Research Society, s. 59-641946-4274
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