Preparation and characterization of nano-sized Ag/PVP composites for optical applications
Preparation and characterization of nano-sized Ag/PVP composites for optical applications
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DOI：
10.1007/s100510070243
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发表时间：
2000-07-01
影响因子：
1.6
通讯作者：
Nicolais, L
中科院分区：
文献类型：
--
作者：
Carotenuto, G;Pepe, GP;Nicolais, L
通过对多元醇工艺的改进，可以直接合成纳米尺寸的银颗粒，这些银颗粒具有狭窄的尺寸分布和嵌入在聚合物基体中的可控制的平均尺寸。在聚合保护剂（即聚（n -乙烯基吡咯烷酮））和超声波的存在下，硝酸银在乙二醇中还原得到了胶体银的分散。通过添加丙酮去除活性混合物中的胶体来控制最终粒径。在紫外可见光谱中，410 nm处的非常强的等离子体共振峰和350 nm处的特征是稀释AR颗粒纳米尺寸的明显结果。所提出的工艺提供了有效地使用这些合成材料生产先进光学设备的滤色器的可能性。
A modification of the polyol process has enabled the direct synthesis of nm-sized Ag particles with narrow size distribution and controlled average dimension embedded in a polymeric matrix. Dispersion of colloidal silver was obtained by reduction of silver nitrate in ethylene-glycol in the presence of a polymeric protective agent (i.e., poly(N-vinylpyrrolidone)) and ultrasounds. The final particle size was controlled by removing the colloid from the reactive mixture by addition of acetone. The very strong plasmon resonance peak at 410 nm and a feature at 350 nm in the UV-visible spectra are a clear consequence of the nanosize of dilute AR particles. The proposed process offers the possibility to effectively use these synthesised materials for the production of colour filters for advanced optical devices.