金属-染料包覆共掺杂复合物的制备与热学特性

Preparation and Thermal Properties of Compound Coated-Codoped with Metal Nanoparticles and Azo-Dye

提出了一种基于包覆共掺杂结构金属纳米粒子偶氮染料复合物(MNPADC) 合成的新方法,可使偶氮染料甲基橙定向吸附于球形金属银纳米粒子表面形成染料对纳米粒子的包覆结构,再将具有该结构的掺杂剂掺于聚合物基质聚乙烯醇中,制备出MNPADC复合材料薄膜.紫外-可见吸收光谱表明,该材料在波长为400～450 nm的波段具有良好的光吸收特性.热质量分析发现,其热学特性更适合于光存储的要求.实验结果表明,该材料的设计方法为改善有机光存储介质材料的热学性能提供了简便而有效的途径.

A new synthetic method for nanocomposites, which are doped by metal nanoparticles azo-dye compound (MNPADC) based on the structural model for coating-codoping, was presented. Firstly, the azo-dye methyl orange (MO) were oriented and adsorbed on the surface of spherical metal silver nanoparticles to form the dye-coating. Secondly, the coated particles were doped into polymer matrix polyvinyl alcohol (PVA) solution. Finally, the nanocomposites film was prepared by spin-coating. The structural model for coating-codoping of nanocomposites was proposed, and its thermal properties were analyzed. The UV-Vis spectrum of sample shows that there is an intense absorption in the blue-violet band (400-450 nm). It is found from TGA that the MNPADC nanocomposites are more suitable for the requirements optical storage compared with the only azo-dye doped one due to its excellent thermal properties. The experimental results indicate that the synthetic method presented here can offer an effective way for improving the thermal properties of organic optical storage materials.