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| 1 | A mini-review on rare-earth down-conversion nanoparticles for NIR-II imaging of biological systems显示文摘Rare-earth(RE)based luminescent probes exhibit rich optical properties including upconversion and down-conversion luminescence spanning a broad spectral range from 300 to 3,000 nm,and have generated great scientific and practical interest from telecommunication to biological imaging.While upconversion nanoparticles have been investigated for decades,down-conversion luminescence of RE-based probes in the second near-infrared(NIR-II,1,000-1,700 nm)window for in vivo biological imaging with sub-centimeter tissue penetration and micrometer image resolution has come into light only recently.In this review,we present recent progress on RE-based NIR-II probes for in vivo vasculature and molecular imaging with a focus on Er3+-based nanoparticles due to the down-conversion luminescence at the long-wavelength end of the NIR-II window(NIR-IIb,1,500-1,700 nm).Imaging in NIR-IIb is superior to imaging with organic probes such as ICG and IRDye800 in the^800 nm NIR range and the 1,000-1,300 nm short end of NIR-II range,owing to minimized light scattering and autofluorescence background.Doping by cerium and other ions and phase engineering of Er^3+-based nanoparticles,combined with surface hydrophilic coating optimization can afford ultrabright,biocompatible NIR-IIb probe towards clinical translation for human use.The Nd^3+-based probes with NIR-II emission at 1,050 and 1,330 nm are also discussed,including Nd^3+doped nanocrystals and Nd^3+-organic ligand complexes.This review also points out future directions for further development of multi-functional RE NIR-II probes for biological imaging. | Yeteng Zhong Hongjie Dai | 2020 | Nano Research2020，13，5： | 11 |
| 2 | 二硫化钼纳米材料的制备及其对心肌细胞的保护作用显示文摘目前,心血管疾病是世界上导致死亡的主要病因,而氧化应激损伤是心血管疾病的重要发病机制之一。本研究旨在探讨二硫化钼(MoS 2)纳米材料在心肌细胞受到氧化应激损伤时的抗氧化保护作用。我们通过一步水热法合成了具备类抗氧化酶活性的MoS 2纳米材料。通过MTT比色法、细胞内凋亡、细胞内活性氧(ROS)检测及Western Blot等实验证实MoS 2纳米材料(100μg/mL)可以很好地保护H9c2心肌细胞免受双氧水(H2O2)诱导的氧化应激损伤。同时,还促进了H9c2心肌细胞的增殖。本研究显示了MoS2纳米材料可用于构建针对氧化应激损伤引起的心血管疾病的抗氧化剂防御,为纳米药物在抗心肌氧化损伤研发提供实验数据及理论依据。 | 高明 赵开东 刘祥永 金元哲 | 2020 | 应用化学2020，37，9： | 0 |
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