Gold/Titania Core/Sheath Nanowires Prepared by Layer-by-Layer Assembly
Gold/Titania Core/Sheath Nanowires Prepared by Layer-by-Layer Assembly
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DOI：
10.1021/jp034184q
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发表时间：
2003-05
影响因子：
3.3
通讯作者：
Yu‐Guo Guo;A. Wan;C. Bai
中科院分区：
文献类型：
--
作者：
Yu‐Guo Guo;A. Wan;C. Bai
采用逐层自组装和焙烧的方法制备了Au/TiO2核/鞘纳米线。通过使用阳离子聚电解质和无机前驱体在模板生长的Au纳米线上的LBL组装，实现了有序阵列。用扫描电子显微镜、透射电子显微镜和X射线能谱分析等手段对丝材进行了分析。结果表明，所制备的复合纳米线具有面心立方多晶金核的锐钛矿型二氧化钛多孔鞘。这种组装策略将在制备核/鞘纳米线方面发挥作用。首次报道的核/多孔鞘纳米线由于其复合和高度多孔的结构，有望成为化学传感器和光催化的理想纳米结构。
The strategy of layer-by-layer (LbL) self-assembly and calcining has been employed to prepare Au/TiO2 core/sheath nanowires. Ordered arrays were achieved by using an LbL assembly of cationic polyelectrolytes and inorganic precursors on template-grown Au nanowires. The wires were investigated with SEM, TEM, and X-ray energy dispersion analysis. The prepared composite nanowires were found to possess anatase porous sheaths of TiO2 with face-center-cubic polycrystallite Au cores. The assembly strategy will be useful in fabricating core/sheath nanowires. The first reported core/porous-sheath nanowire is expected to be an ideal nanostructure for chemical sensors and photocatalysis due to its composite and highly porous structure.