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首页> 外文期刊>Journal of Materials Research >Assembly of metallic nanoparticles with controllable size in nanopores of biomorphic oxide fibers templated by cotton tissue
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Assembly of metallic nanoparticles with controllable size in nanopores of biomorphic oxide fibers templated by cotton tissue

机译：在棉组织模板化的生物形态氧化物纤维的纳米孔中尺寸可控的金属纳米粒子的组装

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Biomorphic SiO_2 fibers were synthesized with cotton tissue as the template and with cetyltrimethylammonium bromide (CTAB) as surfactant through a surface sol-gel process. The as-prepared samples retain well the original morphology of cotton and show a uniform and large amount of nanopores. Sliver nanoparticles were successfully incorporated into the nanopores through impregnation and chemical reduction to form SiO_2/Ag composite fibers. Ag nanoparticles with mean diameter approximately 3 nm have a size distribution in accordance with the nanoporosity of SiO_2 matrix. Such composite fibers show prominent surface plasma resonance (SPR) effect, and during heat treatment under increasing temperatures, the SPR intensity is enhanced because of the size effect, and the SPR position undergoes a redshift first and then a blueshift.
机译：以棉组织为模板，十六烷基三甲基溴化铵（CTAB）为表面活性剂，通过表面溶胶-凝胶法合成了生物型SiO_2纤维。所制备的样品很好地保留了棉花的原始形态，并显示出均匀且大量的纳米孔。通过浸渍和化学还原，将银纳米颗粒成功地掺入了纳米孔中，从而形成了SiO_2 / Ag复合纤维。具有约3nm的平均直径的Ag纳米颗粒具有根据SiO_2基质的纳米孔隙率的尺寸分布。这种复合纤维显示出显着的表面等离子体共振（SPR）效果，并且在温度升高的热处理过程中，由于尺寸效应，SPR强度增强，并且SPR位置先经历红移，然后发生蓝移。

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