Synthesis and characterization of poly(N-vinylpyrrolidone) filled by monodispersed silver clusters with controlled size
Synthesis and characterization of poly(N-vinylpyrrolidone) filled by monodispersed silver clusters with controlled size
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DOI：
10.1002/aoc.165
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发表时间：
2001-05-01
影响因子：
3.9
通讯作者：
Carotenuto, G
中科院分区：
文献类型：
--
作者：
Carotenuto, G
在聚合物基体中分散非常小的金属颗粒在科学和技术上是重要的。在这里，聚（N-乙烯基吡咯烷酮）（PVP）填充的纳米银颗粒的特征在于窄的尺寸分布和控制的平均尺寸已获得使用的多元醇的方法的修改。特别地，纳米复合材料是通过在超声和PVP作为保护剂的存在下在乙二醇中还原银银来制备的。通过添加丙酮从反应混合物中除去银-PVP系统来控制最终的粒度。材料的W-可见光谱显示出中心在410 nm处的非常强的等离子体共振带。带位置取决于粒度，因此，对颗粒生长过程的控制允许人们调节纳米复合材料吸收波长。这种重要的特性提供了使用Ag-PVP纳米复合材料来生产用于先进光学器件的紫外线吸收剂和滤色器的可能性。版权所有（C）2001约翰威利父子有限公司
Dispersions of very small metal particles in polymeric matrixes are scientifically and technologically important. Here, poly(N-vinylpyrrolidone) (PVP) filled with nanometric silver particles characterized by a narrow size distribution and a controlled average dimension has been obtained using a modification of the polyol process. In particular, the nanocomposite material was prepared by reduction of silver nitrate in ethylene glycol in the presence of ultrasound and PVP as a protective agent. The final particle size was controlled by removing the silver-PVP system from the reactive mixture by addition of acetone, The W-visible spectrum of the material shows a very strong plasmon resonance band centred at 410 nm, The band position depends on the particle size and, consequently, the control of the particle growth process allows one to modulate the nanocomposite absorption wavelength. Such an important characteristic offers the possibility to use Ag-PVP nanocomposites to produce UV-absorbers and colour filters for advanced optical devices. Copyright (C) 2001 John Wiley & Sons, Ltd.