纳米晶
材料科学
水溶液
纳米技术
超声
钙钛矿(结构)
胶束
光电子学
发光二极管
化学工程
化学
有机化学
工程类
作者
Kok Ken Chan,David Giovanni,Hua‐Jun He,Tze Chien Sum,Ken‐Tye Yong
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2021-08-27
卷期号:4 (9): 9022-9033
被引量:30
标识
DOI:10.1021/acsanm.1c01621
摘要
CsPbX3 nanocrystals have been employed in various optoelectronic applications, such as light-emitting diodes and solar cells. Nevertheless, widespread application of CsPbX3 nanocrystals has been largely restricted by their poor aqueous stability. Despite the tremendous efforts focused on encapsulating the CsPbX3 nanocrystals, it is still very challenging to achieve CsPbX3 nanocrystals with good aqueous stability. This work describes the preparation and encapsulation methods for CsPbBr3/SiO2/mPEG-DSPE nanocrystals that can be readily dispersed in water and biological buffers. To the best of our knowledge, this is the first work that reports multiphoton emissions from CsPbBr3/SiO2/mPEG-DSPE nanocrystals in water. The protection afforded by the silica shell and phospholipid micelles enables the CsPbBr3/SiO2/mPEG-DSPE nanocrystals in aqueous solution to exhibit enhanced long-term stability and better shielding against ultrasonication treatment and continuous light irradiation than bare CsPbBr3 nanocrystals. The toxicity of the CsPbBr3/SiO2/mPEG-DSPE nanocrystals has been evaluated in various cell lines. Subsequently, the encapsulated nanocrystals were used for targeted single and multiphoton imaging of cancer cells. This work not only describes the preparation of water-stable CsPbBr3 nanocrystals but also paves the way for their applications in multiphoton bioimaging applications.
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