کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1605168 | 1516205 | 2016 | 8 صفحه PDF | دانلود رایگان |
• Yb3+/Er3+ ions doped fluorapatite nanoparticles was prepared for bioimaging.
• Excitation at 980 nm exhibited NIR emission at 1532 nm with quantum yield 74%.
• Quantum yield shows a linear tendency on Yb concentration.
Trivalent Yb and Er doped fluoroapatite nanoparticles were prepared by a microwave assisted wet precipitation method using calcium nitrate tetrahydrate, diammonium hydrogen phosphate, ammonium fluoride and Yb, Er nitrate tetrahydrate as precursors. Well crystallized nanoparticles of rod like morphology with length and width of about 26 ± 3 and 9 ± 2 nm was obtained. Under 980 nm excitation the nanoparticles exhibit strong near infrared emission at 1532 nm with a maximum measured internal quantum yield of 74% in 3 mol% Er and 9 mol% Yb doped sample which is 26% less than the 100% radiative quantum yield predicted by Judd-Ofelt procedure. The measured quantum yield shows a linear dependence of quantum yield on Yb concentration.
Journal: Journal of Alloys and Compounds - Volume 689, 25 December 2016, Pages 525–532