中空Ag纳米球壳的制备及性能表征
Preparation of hollow silver microspheres and their characterization
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摘要: 以改性聚苯乙烯微球为模板，采用化学镀法在聚苯乙烯微球表面包覆一层银，在四氢呋喃溶液中将聚苯乙烯微球溶解，得到中空Ag纳米球壳。采用扫描电镜、透射电镜和X射线衍射仪对样品进行了表征及分析，并用紫外可见分光光度计研究了粒子的光学性质。实验结果表明：运用此法成功地制备出中空Ag纳米球壳的内径为250 nm，壁厚约为15 nm，并且成功地使纳米粒子的紫外吸收光谱由600 nm红移至900 nm左右，实现了在可见光至近红外光区调节Ag纳米结构的吸收峰。Abstract: Hollow silver microspheres have been prepared using modified polystyrene microspheres as hard template. The process of preparation is as follows:polystyrene microspheres with a layer of silver coated on their surface by the chemical planting method were dissolved in tetrahydrofuran, then the hollow silver microspheres were prepared. The properties of silver microspheres were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The optical properties of silver microspheres were studied using UV-Vis spectrophotometer. The inside diameter of silver hollow microspheres is 250 nm, the shell thickness is 15 nm, and the absorption peak of nanoparticles can redshift from 600 nm to 900 nm at the range of UV-Vis spectra. These routes realize a faci
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