Polymer-template-assisted growth of gold nanowires using a novel flow-stream technique.
Polymer-template-assisted growth of gold nanowires using a novel flow-stream technique.
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使用新型流动技术进行聚合物模板辅助金纳米线的生长。
DOI：
10.1021/la901432j
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
P. Müller‐Buschbaum
中科院分区：
文献类型：
--
作者：
E. Metwalli;J. Moulin;J. Perlich;W. Wang;A. Diethert;S. Roth;P. Müller‐Buschbaum
利用流体装置，利用受流体动力作用的溶液，将金纳米粒子分散体浇铸到纳米结构聚合物模板上。用原位掠入射小角X射线散射(GISAXS)研究了两嵌段共聚物从金流溶液到聚合物模板上的渐进金沉积过程。连续流动的溶液使嵌段共聚物膜的两个微相分离块之间的X射线对比度有系统地增加，表明流动诱导选择性地将金固定在一个块上。金属沉积聚合物薄膜的原位GISAXS数据和原子力显微镜都证明了纳米颗粒的一维聚合形成了连续的纳米线。随着通过连续流动方法加载额外的金纳米颗粒，纳米颗粒沉积的选择性因形成伪均匀金层而降低。因此，这种流动沉积技术引入了一种简单的替代气相沉积技术的方法来进行表面金纳米沉积。
By utilizing a fluidic device, a gold nanoparticle dispersion is cast onto a nanostructured polymer template using solution subjected to hydrodynamic flow. With in situ grazing incidence small-angle X-ray scattering (GISAXS), the progressive gold deposition from a stream of gold solution onto the polymer template of a diblock copolymer with parallel cylinder morphology arranged into powder-like domains is investigated. The continuously flowing solution causes a systematic increase in the X-ray contrast between both of the microphase-separated blocks of the block copolymer film, indicating flow-induced selective gold immobilization on one block. Both in situ GISAXS data and atomic force microscopy of the metal-deposited polymer film prove the 1D coalescence of nanoparticles into continuous nanowires. With additional gold nanoparticle upload by the continuous flow-stream method, the selectivity of the nanoparticle deposition diminishes as a result of the formation of a pseudo uniform gold layer. Consequently, this flow-stream deposition technique introduces an easy alternative method to the vapor deposition technique for surface gold nanopatterning.