Polymer/metal segmental Janus nanoparticles
| Autor: | Fuxin Liang, Xiaozhong Qu, Zhenzhong Yang, Lin Tang, Qian Wang, Bingyin Jiang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics General Chemical Engineering Organic Chemistry Nanoparticle Janus particles 02 engineering and technology Polymer Conjugated system 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Lower critical solution temperature 0104 chemical sciences chemistry Chemical engineering Polymer chemistry Amphiphile Copolymer Janus 0210 nano-technology |
| Zdroj: | Chinese Journal of Polymer Science. 35:799-808 |
| ISSN: | 1439-6203 0256-7679 |
| DOI: | 10.1007/s10118-017-1946-1 |
| Popis: | Polymer/metal composite segmental Janus nanoparticles (NPs) are synthesized by sequential growth against poly(4-vinylpyridine) (P4VP) crosslinked cP4VP-PS Janus NPs. A Janus cluster of poly(4-vinylpyridine)-block-polystyrene (P4VP-b-PS) diblock copolymer is self-organized after absorption onto a silica patchy sphere via hydrogen bonding. Selective crosslinking of P4VP leads to the formation of robust cP4VP-PS Janus NPs. Within the cP4VP domain, functional species such as metals are preferentially grown by in situ reduction. Other thiol-capped polymers, for example, thiol-capped poly(N-isopropylacrylamide) (PNIPAM-SH), can be conjugated onto the opposite side to form polymer/metal triple segmental Janus NPs. The hyperthermia effect of Au NP of PNIPAM-Au@cP4VP-PS by near infrared (NIR) irradiation can trigger a fast transition from amphiphilic to hydrophobic of the Janus NPs at low surrounding temperature. De-stabilization of the emulsion is NIR triggered although the system temperature is below LCST (~32℃). |
| Databáze: | OpenAIRE |
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