Nanocrystal Encapsulation, Release and Application Based on pH-Sensitive Covalent Dynamic Hyperbranched Polymers
oleh: Yunfeng Shi, Gaiying Lei, Linzhu Zhou, Yueyang Li, Xiaoming Zhang, Yujiao Yang, Han Peng, Rui Peng, Huichun Wang, Xiufen Cai, Xinglong Chen, Mengyue Wang, Gang Wang
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2019-11-01 |
Deskripsi
A new strategy for nanocrystal encapsulation, release and application based on pH-sensitive covalent dynamic hyperbranched polymers is described. The covalent dynamic hyperbranched polymers, with multi-arm hydrophobic chains and a hydrophilic hyperbranched poly(amidoamine) (HPAMAM) core connected with pH-sensitive imine bonds (HPAMAM−DA), could encapsulate CdTe quantum dots (QDs) and Au nanoparticles (NPs). Benefiting from its pH response property, CdTe QDs and Au NPs encapsulated by HPAMAM−DA could be released to aqueous phase after imine hydrolysis. The released CdTe/HPAMAM and Au/HPAMAM nanocomposites exhibited excellent biological imaging behavior and high catalytic activities on <i>p</i>-nitrophenol hydrogenation, respectively.