Change search
ReferencesLink to record
Permanent link

Direct link
Green synthesis of Y2O3:Eu3+ nanocrystals for bioimaging
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. IUST-Iran University of Science and Technology, Iran.
KTH, School of Engineering Sciences (SCI), Applied Physics, Biomedical and X-ray Physics.
Show others and affiliations
2015 (English)In: Materials Research Society Symposium Proceedings, Materials Research Society, 2015, Vol. 1720, 59-64 p.Conference paper (Refereed)
Abstract [en]

Rare earth (e.g., Eu, Er, Yb, Tm) doped Y<inf>2</inf>O<inf>3</inf> 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 Y<inf>2</inf>O<inf>3</inf>: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)CO<inf>3</inf>:Eu3+ precursors at 900°C for 2 hours, a highly crystalline cubic Y<inf>2</inf>O<inf>3</inf> structure was obtained. The Y<inf>2</inf>O<inf>3</inf>:Eu3+ spherical particles showed a strong red emission peak at 613nm due to the 5D<inf>0</inf>-7F<inf>2</inf> 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.

Place, publisher, year, edition, pages
Materials Research Society, 2015. Vol. 1720, 59-64 p.
, Materials Research Society Symposium Proceedings, ISSN 0272-9172
Keyword [en]
Biocompatibility, Calcination, Electric excitation, Erbium, Erbium compounds, Europium compounds, Fluorescence, Heavy metals, Light scattering, Nanocrystals, Photobleaching, Photoluminescence, Precipitation (chemical), Semiconductor quantum dots, Spheres, Thulium, Urea, Ytterbium, Electric dipole transition, Fluorescent bioimaging, Narrow size distributions, Photoluminescence analysis, Photoluminescence properties, Polycrystalline structure, Spherical morphologies, Thermochemical treatments, Europium
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-177238DOI: 10.1557/opl.2015.293ScopusID: 2-s2.0-84938911344ISBN: 9781510806054OAI: diva2:872806
2014 MRS Fall Meeting, 30 November 2014 through 5 December 2014

QC 20151120

Available from: 2015-11-20 Created: 2015-11-17 Last updated: 2015-11-20Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Khachatourian, Malek AdrineVogt, CarmenZhao, YichenToprak, Muhammet S.
By organisation
Materials- and Nano PhysicsBiomedical and X-ray PhysicsFunctional Materials, FNM
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 51 hits
ReferencesLink to record
Permanent link

Direct link