Highly Doped Upconversion Nanoparticles for In Vivo Applications Under Mild Excitation Power

التفاصيل البيبلوغرافية
العنوان: Highly Doped Upconversion Nanoparticles for In Vivo Applications Under Mild Excitation Power
المؤلفون: Shihui Wen, Wei Hu, Du Li, Dayong Jin, Xiangyang Shi, Bingyang Shi, Mengya Kong, Yongtao Liu
المصدر: Analytical Chemistry. 92:10913-10919
بيانات النشر: American Chemical Society (ACS), 2020.
سنة النشر: 2020
مصطلحات موضوعية: Brightness, Chemistry, business.industry, Night vision, Doping, Nanoparticle, Optoelectronics, business, Photon upconversion, Excitation, Analytical Chemistry, Power density, Ion
الوصف: One of the major challenges in using upconversion nanoparticles (UCNPs) is to improve their brightness. This is particularly true for in vivo studies, as the low power excitation is required to prevent the potential photo toxicity to live cells and tissues. Here, we report that the typical NaYF4:Yb0.2,Er0.02 nanoparticles can be highly doped, and the formula of NaYF4:Yb0.8,Er0.06 can gain orders of magnitude more brightness, which is applicable to a range of mild 980 nm excitation power densities, from 0.005 W/cm2 to 0.5 W/cm2. Our results reveal that the concentration of Yb3+ sensitizer ions plays an essential role, while increasing the doping concentration of Er3+ activator ions to 6 mol % only has incremental effect. We further demonstrated a type of bright UCNPs 12 nm in total diameter for in vivo tumor imaging at a power density as low as 0.0027 W/cm2, bringing down the excitation power requirement by 42 times. This work redefines the doping concentrations to fight for the issue of concentration quenching, so that ultrasmall and bright nanoparticles can be used to further improve the performance of upconversion nanotechnology in photodynamic therapy, light-triggered drug release, optogenetics, and night vision enhancement.
تدمد: 1520-6882
0003-2700
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::f943ff8db0e4464ba9859cdb013597e5Test
https://doi.org/10.1021/acs.analchem.0c02143Test
حقوق: OPEN
رقم الانضمام: edsair.doi...........f943ff8db0e4464ba9859cdb013597e5
قاعدة البيانات: OpenAIRE