当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Alcohol-Stable Perovskite Nanocrystals and Their In Situ Capsulation with Polystyrene
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-07-12 , DOI: 10.1021/acsami.2c07707 Jie Chen 1 , Xu Huang 1 , Zelian Xu 1 , Yuwu Chi 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-07-12 , DOI: 10.1021/acsami.2c07707 Jie Chen 1 , Xu Huang 1 , Zelian Xu 1 , Yuwu Chi 1
Affiliation
|
In recent years, lead halide perovskite nanocrystals (PNCs) have presented potential scalable applications in all fields due to their outstanding properties. However, most commonly used PNCs capped with oleic acid (OA) and oleylamine (OAm) suffer from bad stability in polar solutions and thus require various surface protections with organic or inorganic materials. Encapsulation with highly hydrophobic polystyrene (PS) is one of the most efficient ways to protect PNCs; however, the presently used swelling–shrinking strategy faces several challenges, such as weak interaction between PS chains and the surface ligands in nonpolar media causing a low encapsulation efficiency, and serious aggregation of PS particles during the shrinkage process leading to very different particle sizes. Herein, alcohol-stable polyacrylic acid-capped CsPbBr3 PNCs (i.e., PAA-PNCs) are first synthesized and then in situ encapsulated with PS shells by polymerizing styrene monomer on the PNC surfaces in a polar organic solvent (e.g., ethanol). The in situ PS-encapsulated PAA-PNCs (i.e., PAA-PNCs@iPS) exhibit outstanding monodispersity, remarkable water, heat, and UV stability, high fluorescence activity, and color purity. The unique synthesis strategy and good performances of PAA-PNCs@iPS will boost the applications of PNCs in LEDs, biological imaging, and chemosensing.
中文翻译：
醇稳定钙钛矿纳米晶体及其聚苯乙烯原位封装
近年来，卤化铅钙钛矿纳米晶（PNC）由于其优异的性能，在各个领域都呈现出潜在的可扩展应用。然而，最常用的油酸（OA）和油胺（OAm）封端的PNC在极性溶液中稳定性较差，因此需要用有机或无机材料进行各种表面保护。高疏水性聚苯乙烯（PS）封装是保护 PNC 最有效的方法之一；然而，目前使用的溶胀-收缩策略面临着一些挑战，例如非极性介质中PS链与表面配体之间的相互作用较弱，导致封装效率较低；收缩过程中PS颗粒严重聚集，导致粒径差异很大。在此，首先合成醇稳定的聚丙烯酸封端的CsPbBr 3 PNC（即PAA-PNC），然后通过在极性有机溶剂（例如乙醇）中在PNC表面上聚合苯乙烯单体，用PS壳原位封装。原位 PS 封装的 PAA-PNC（即 PAA-PNCs@iPS）表现出出色的单分散性、出色的水、热和紫外线稳定性、高荧光活性和色纯度。 PAA-PNCs@iPS独特的合成策略和良好的性能将促进PNCs在LED、生物成像和化学传感中的应用。
更新日期：2022-07-12
中文翻译：
醇稳定钙钛矿纳米晶体及其聚苯乙烯原位封装
近年来，卤化铅钙钛矿纳米晶（PNC）由于其优异的性能，在各个领域都呈现出潜在的可扩展应用。然而，最常用的油酸（OA）和油胺（OAm）封端的PNC在极性溶液中稳定性较差，因此需要用有机或无机材料进行各种表面保护。高疏水性聚苯乙烯（PS）封装是保护 PNC 最有效的方法之一；然而，目前使用的溶胀-收缩策略面临着一些挑战，例如非极性介质中PS链与表面配体之间的相互作用较弱，导致封装效率较低；收缩过程中PS颗粒严重聚集，导致粒径差异很大。在此，首先合成醇稳定的聚丙烯酸封端的CsPbBr 3 PNC（即PAA-PNC），然后通过在极性有机溶剂（例如乙醇）中在PNC表面上聚合苯乙烯单体，用PS壳原位封装。原位 PS 封装的 PAA-PNC（即 PAA-PNCs@iPS）表现出出色的单分散性、出色的水、热和紫外线稳定性、高荧光活性和色纯度。 PAA-PNCs@iPS独特的合成策略和良好的性能将促进PNCs在LED、生物成像和化学传感中的应用。
京公网安备 11010802027423号