التفاصيل البيبلوغرافية
| العنوان: |
Acetic acid-mediated rapid cubic-to-hexagonal (α–β) phase transformation for ultra-bright lanthanide-doped β-NaYF4 nano-bioprobes. |
| المؤلفون: |
Jiang, Shihui, Ke, Jianxi, Li, Guowei, Liu, Aijun, Li, Xiaohan, Ye, Lixiang, Jiang, Feilong, Liu, Yongsheng, Hong, Maochun |
| المصدر: |
Nano Research; Jul2023, Vol. 16 Issue 7, p10026-10033, 8p |
| مصطلحات موضوعية: |
RARE earth metals, PHASE transitions, WHOLE body imaging, PHOTON upconversion, LOW temperatures, SPATIAL resolution |
| مستخلص: |
Hexagonal-phase NaYF4 (β-NaYF4) has been acknowledged to be one of the most efficient doping hosts to prepare bright lanthanide-doped luminescent nano-bioprobes for various biomedical applications. However, to date, it remains a great challenge to synthesize ultra-bright lanthanide-doped β-NaYF4 nano-bioprobes under a low reaction temperature by using conventional synthetic methods. Herein, we first develop an acetic acid (HAc)-mediated coprecipitation method for the preparation of ultra-bright lanthanide-doped β-NaYF4 nanoprobes under a low reaction temperature at 200 °C. Based on a series of comparative spectroscopic investigations, we show that the use of HAc in the reaction environment can not only promote the rapid α–β phase transformation of NaYF4 host at 200 °C within 1 h but also boost the absolute photoluminescence quantum yield (PLQY) of NaYF4 nanocrystals to 30.68% for near-infrared emission and to 3.79% for upconversion luminescence, both of which are amongst the highest values for diverse lanthanide-doped luminescent nanocrystals ever reported. By virtue of their superior near-infrared luminescence, we achieve optical-guided dynamic vasculature imaging in vivo of the whole body at a high spatial resolution (23.8 µm) under 980 nm excitation, indicating its potential for the diagnosis and treatment evaluation of vasculature-related diseases. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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