【摘要】 对传统的"St ber-Fink"合成SiO2微球的工艺进行了改进,运用"籽晶生长法"合成了单分散SiO2微球,该法可以准确地控制微球尺寸,提高微球的球形度。采用垂直沉积法制备了胶体晶体,并对样品的结构和光学性能进行了表征。研究了微球尺寸对垂直沉积SiO2胶体晶体光子带隙的影响,结果表明,通过控制微球粒径,可调节光子晶体的带隙位置。更多还原

【Abstract】 An improvement to the traditional Stber-Fink route to synthesize SiO2 colloidal microspheres was achieved,and the highly monodisperse SiO2 colloidal microspheres were synthesized using the improved seed-growth method.Their size-control precision and shape sphericity are improved for these SiO2 colloidal microspheres.The SiO2 colloidal crystal was assembled using vertical deposition technique,and their microstructures and optical properties are characterized with the photonic band-gap(PBG) at near infrared wavelength.The effects of SiO2 colloidal microspheres size on the photonic band-gap are revealed for these SiO2 colloidal crystals from the vertical deposition.更多还原