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Sub-5-nm lanthanide...
Sub-5-nm lanthanide-doped ZrO2@NaYF4 nanodots as efficient upconverting probes for rapid scanning microscopy and aptamer-mediated bioimaging
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Liu, Jing (författare)
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Li, Nana (författare)
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Wu, Ruitao (författare)
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Zhao, Yuxiang (författare)
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Zhan, Qiuqiang (författare)
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- He, Sailing (författare)
- KTH,Elektroteknisk teori och konstruktion,SCNU, S China Acad Adv Optoelect, SCNU ZJU Joint Res Ctr Photon, Guangzhou 510006, Guangdong, Peoples R China
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: Optical Materials Express. - 2159-3930 .- 2159-3930. ; 5:8, s. 1759-1771
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Upconversion nanoparticles (UCNPs) is a class of promising probes widely used in protein molecules imaging due to the no photobleaching and non-blinking emission. However, it is still remained challenging to synthesize a type of ultra-small but bright UCNPs. In this paper, a new class of efficient sub-5-nm upconversion nanodots (UCNDs) was elaborately designed and experimentally demonstrated. The proposed uniform UCNDs comprise two parts: a 3.5-nm Ln(3+)-doped ZrO2 core and 0.5-nm NaYF4 shell. The emission intensity of the proposed UCNDs was measured to be more than 10 times brighter than that of the conventional 10-nm NaYF4 UCNPs. Under 300 kW.cm(-2) irradiance excitation, the 15 mol% Er3+-doped UCNDs exhibit an 18-fold enhanced intensity and one fifth emission lifetime compared to the 0.5 mol% Er3+-doped ones. Using the biocompatible UCNDs, the aptamer-mediated proteins-targeted imaging was performed and demonstrated high efficiency. These ultra-small, efficient UCNDs would have great potentials in rapid scanning and cellular imaging.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
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