One-Pot Synthesis of Ag@TiO2 Core−Shell Nanoparticles and Their Layer-by-Layer Assembly
One-Pot Synthesis of Ag@TiO2 Core−Shell Nanoparticles and Their Layer-by-Layer Assembly
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DOI：
10.1021/la991212g
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发表时间：
2000-01
期刊：
影响因子：
3.9
通讯作者：
I. Pastoriza‐Santos;D. Koktysh;A. Mamedov;M. Giersig;N. Kotov;L. Liz‐Marzán
中科院分区：
文献类型：
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作者：
I. Pastoriza‐Santos;D. Koktysh;A. Mamedov;M. Giersig;N. Kotov;L. Liz‐Marzán
通过非常简单的一锅法合成了包覆有均匀、薄壳的二氧化钛的银纳米颗粒，其中Ag+还原为Ag 0和TiO 2在银微晶表面上的受控聚合同时发生。所制备的分散体的涂层纳米粒子显示表面等离子体带，这是显着的红移相对于裸银。通过层层组装制备了高质量的核壳簇合物薄膜。纳米颗粒排列在紧密堆积的层中，与纳米颗粒交错，产生具有独特结构和催化和电子传输特性的分层核壳混合材料。
Silver nanoparticles coated with a uniform, thin shell of titanium dioxide are synthesized via a remarkably simple one-pot route, where the reduction of Ag+ to Ag0 and the controlled polymerization of TiO2 on the surface of silver crystallites take place simultaneously. The prepared dispersions of coated nanoparticles display a surface plasmon band, which is significantly red-shifted with respect to that of bare Ag. High-quality ultrathin films of the core−shell clusters are prepared via layer-by-layer assembly. The nanoparticles are arranged in closely packed layers interlaced with polyelectrolyte producing a stratified core−shell hybrid material with unique structure and catalytic and electron-transport properties.