Herein, we report the selective functionalization of nano-domains obtained by the self-assembly of a polystyrene-block-poly(vinyl benzyl azide) PS-b-PVBN₃ copolymer synthesized in three steps. First, a polystyrene macro-initiator was synthesized, and then extended with vinyl benzyl chloride by nitroxide mediated polymerization to form polystyrene-block-poly(vinyl benzyl chloride) PS-b-PVBC. Nucleophilic substitution of vinyl benzyl chloride into a vinyl benzyl azide moiety is finally performed to obtain PS-b-PVBN₃ which self-assembled into nano-domains of vinyl benzyl azide PVBN₃. Click chemistry was then used to bind functional gold nanoparticles and poly(N-isopropylacrylamide) (PNIPAM) on PVBN₃ domains due to the specific anchoring at the surface of the nanopatterned film. Atomic force microscopy (AFM) was used to observe the block copolymer self-assembly and the alignment of the gold nanoparticles at the surface of the PVBN₃ nanodomains. Thorough X-ray photoelectron spectroscopy (XPS) analysis of the functional film showed evidence of the sequential grafting of nanoparticles and PNIPAM. The hybrid surface expresses thermo-responsive properties and serves as a pattern to perfectly align and control the assembly of inorganic particles at the nanoscale.

中文翻译：

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嵌段共聚物自组装驱动的纳米图案双反应表面

在本文中，我们报道了通过三步合成的聚苯乙烯嵌段-聚（乙烯基苄基叠氮化物）PS- b - PVBN ₃共聚物的自组装获得的纳米域的选择性功能化。首先，合成聚苯乙烯大分子引发剂，然后通过硝基氧介导的聚合反应，用乙烯基苄基氯进行扩链，以形成聚苯乙烯嵌段-聚（乙烯基苄基氯）PS- b - PVBC。最后进行乙烯基苄基氯对乙烯基苄基叠氮化物部分的亲核取代以获得PS- b - PVBN ₃，其自组装成乙烯基苄基叠氮化物PVBN _3的纳米域。。然后，由于在纳米图案膜的表面上的特定锚定，因此使用点击化学将功能性金纳米颗粒和聚N-异丙基丙烯酰胺（PNIPAM）结合在PVBN ₃域上。原子力显微镜（AFM）用于观察嵌段共聚物的自组装和金纳米颗粒在PVBN ₃纳米域表面的排列。功能膜的彻底X射线光电子能谱（XPS）分析显示了纳米颗粒和PNIPAM顺序接枝的证据。杂化表面表现出热响应特性，并充当图案以在纳米级完美对齐和控制无机颗粒的组装。