Polymer/metal segmental Janus nanoparticles |
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| Authors: | Lin Tang Fu-xin Liang Qian Wang Xiao-zhong Qu Bing-yin Jiang Zhen-zhong Yang |
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| Institution: | 1. State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry,Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China;2. State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry,Chinese Academy of Sciences, Beijing 100190, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | 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 ℃). |
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| Keywords: | Janus Polymer Composite Nanoparticle Interactive performance |
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