氘代聚苯乙烯胶体晶体的制备及光学性质研究

以水作为介质合成了高度单分散的氘代聚苯乙烯微球,并利用垂直沉积法制备了高质量的氘代聚苯乙烯胶体晶体.傅立叶变换红外光谱清楚地表明氘代苯乙烯单体发生了聚合反应；扫描电镜表面分析展示出胶体微球的高度有序排列,断面分析表明氘代聚苯乙烯胶体晶体为面心立方结构；光学透射谱显示出氘代聚苯乙烯胶体晶体的高次布拉格衍射特征,通过和理论计算的能带结构对比,进一步证实了氘代聚苯乙烯胶体晶体为面心立方结构；变角度光学透射谱测量显示,随着入射角的增大,(111)面的衍射峰蓝移,而(200)和(220)面的衍射峰发生红移.

Fabrication and optical properties of deuterated polystyrene colloidal crystals

Highly monodisperse deuterated polystyrene colloidal spheres were synthesized in water medium.High-quality deuterated polystyrene colloidal crystals were fabricated by vertical deposition method.It was clearly shown that deuterated styrene monomers had generated a polymerization reaction through Fourier transform infrared spectroscopy.Highly ordered arrangement of colloidal microspheres was confirmed by scanning electron microscopy,and it was considered to be face-centered cubic structure by cross-sectional image analysis.The transmission spectra of deuterated polystyrene colloidal crystals exhibited some characterization of high-order Bragg diffraction,which further confirmed the face-centered cubic close-packed structure of deuterated polystyrene colloidal crystals as compared to the calculated band structure.Angle resolved transmission spectra showed the diffraction peak of(111) plane was blueshifted,while the diffraction peaks of(200) and(220) planes were both redshifted as increasing the incident angles.