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Interface‐Hybridization‐Enhanced Photothermal Performance of Polypyrrole/Polydopamine Heterojunctions on Porous Nanoparticles
Author(s) -
Huang Jixi,
Wang Shuai,
Xing Yuxin,
Zhou Wei,
Zhang Jixi,
Cai Kaiyong
Publication year - 2019
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201900263
Subject(s) - photothermal therapy , polypyrrole , materials science , nanoparticle , heterojunction , porosity , nanotechnology , interface (matter) , photothermal effect , chemical engineering , polymer , optoelectronics , composite material , engineering , polymerization , contact angle , sessile drop technique
Photothermal conversion agents (PTCAs) based on π‐conjugated polymers are promising for cancer therapy, but the alteration of bandgap energies toward boosted photothermal properties remains challenging. Herein, polymer PTCAs with heterojunctions of a binary optical component are developed by interface hybridization on porous particles. Specifically, polypyrrole (PPy) nanodomains are successfully hosted on the wet‐adhesive surface of mesoporous polydopamine nanoparticles through the loading and polymerization of pyrrole in the confined pore space (≈5.0 nm). The near‐infrared absorbing polymers in the heterojunctions possess similar five‐membered heterocyclic rings and can interact mutually to generate photoinduced electron transfer (PET). Such a large‐area optoelectronic interaction progressively reduces the bandgap energy (down to 0.56 eV) by increasing the doped amount of PPy, which consequently enhances the extinction coefficient and photothermal conversion efficiency by 4.6‐ and 2.2‐fold, respectively. Notably, the hybrid PTCA exhibits good biocompatibility, photocytotoxicity, and great potential for cancer therapy.