光子上转换
单线态氧
光化学
量子产额
材料科学
产量(工程)
分解
相(物质)
纳米颗粒
聚乙烯亚胺
掺杂剂
化学
荧光
纳米技术
氧气
兴奋剂
光电子学
有机化学
光学
物理
冶金
转染
生物化学
基因
作者
Kohei Ishibashi,Hiromasa Kitajima,Hiroyasu Nishiguchi,Emi Hifumi,Takunori Harada
标识
DOI:10.1002/cptc.202200315
摘要
Abstract In this study, we attempted to improve the quantum yield of upconversion nanoparticles to achieve high efficiency of amyloid fibril decomposition cascade induced by near‐infrared‐active upconversion nanoparticles complexed with photosensitizers. The effects of the solvothermal reaction time on the crystalline phase of polyethylenimine‐coated NaYF 4 : Yb 3+ /Er 3+ were studied, while maintaining constant reaction temperature and concentration of the dopants Yb 3+ and Er 3+ . We found that an increased reaction time resulted in the conversion of the crystalline phase from the cubic α‐ to hexagonal β‐forms with a higher upconversion quantum yield. In addition, the prolonged reaction time effectively increased the ratio of green ( 2 H 11/2 and 4 S 3/2 → 4 I 15/2 ) to red ( 4 F 9/2 → 4 I 15/2 ) emissions, increasing the 1 O 2 generation via photosensitization to approximately 10 times that of conventional ones. Consequently, the efficiency of the amyloid fibril decomposition cascade induced by upconversion nanoparticles complexed with photosensitizers was improved.
科研通智能强力驱动
Strongly Powered by AbleSci AI