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首页> 外文会议>Nanomaterial Synthesis and Integration for Sensors, Electronics, Photonics, and Electro-Optics; Proceedings of SPIE-The International Society for Optical Engineering; vol.6370 >Noble metal nanoparticle arrays: control of size, shape and placement via chemical self-assembly
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Noble metal nanoparticle arrays: control of size, shape and placement via chemical self-assembly

机译：贵金属纳米颗粒阵列：通过化学自组装控制尺寸，形状和位置

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摘要

Selective patterning of chemical functional groups on polymer surfaces is utilized for controlled placement of monodisperse noble metal nanoparticles. Self-assembled diblock copolymer films deposited on hydrophobic silicon substrates are used as a template for metal nanoparticle organization. By varying the processing conditions of polymer templates, micelle and cylindrical polystyrene-b-poly(methyl methacrylate) diblock copolymer templates were fabricated. Functional groups on the surface of poly(methyl methacrylate) domains in the diblock copolymer films were chemically modified from an ester group to a carboxylate using a base catalyzed hydrolysis step. Gold and silver nanoparticles were fabricated in solution in order to achieve size and shape control. After gold nanoparticle synthesis, a ligand exchange reaction was performed to produce nanoparticles with amine functional groups for chemical attachment on chemically modified poly(methyl methacrylate) surfaces. Atomic force microscopy and scanning electron microscopy images demonstrate that this fabrication route results in preferential attachment of metal nanoparticles on poly(methyl methacrylate) thin films and on poly(methyl methacrylate) domains in polystyrene-b-poly(methyl methacrylate) diblock copolymer thin films.
机译：聚合物表面上化学官能团的选择性构图用于控制单分散贵金属纳米粒子的放置。沉积在疏水硅基材上的自组装二嵌段共聚物薄膜被用作金属纳米粒子组织的模板。通过改变聚合物模板的加工条件，制备了胶束和圆柱形聚苯乙烯-b-聚（甲基丙烯酸甲酯）二嵌段共聚物模板。使用碱催化的水解步骤将二嵌段共聚物膜中的聚（甲基丙烯酸甲酯）域的表面上的官能团从酯基化学修饰为羧酸酯。在溶液中制备金和银纳米粒子，以实现尺寸和形状控制。金纳米粒子合成后，进行配体交换反应，生成具有胺官能团的纳米粒子，用于化学修饰的聚（甲基丙烯酸甲酯）表面化学附着。原子力显微镜和扫描电子显微镜图像表明，该制备路线导致金属纳米颗粒优先附着在聚（甲基丙烯酸甲酯）薄膜和聚苯乙烯-b-聚（甲基丙烯酸甲酯）二嵌段共聚物薄膜中的聚（甲基丙烯酸甲酯）域上。

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