Effect of sedimentation mediums on Monodispersed Silica Fabrication Opal Structural Template under Gravitational Field
Monodispersed silicon dioxide spherical particles were synthesized by improved Sol-gel methods, tetraethoxysilane as silicon material, ammonia as catalyst and ethanol as solvent. Mean diameter 250nm±, 280nm± and 320nm± of silica spheres sedimentation and organization in different mediums of distilled water, ethanol, acetone and the mixture (water, ethanol) were investigated. SEM shows monodispersed silica particles fabrication by gravity sedimentation in ethanol or acetone trend to forming three-dimension closed packing structural opal, yet ethanol is superior to acetone. It is indicated that the velocity of isometric silica microspheres sedimentation in water, ethanol and acetone reveal almost no different, basing the silica spheres sedimentation experiment. The influence of sedimentation mediums on opal templates results from their surface tension and viscosity. The formation mechanism of opal by gravitational field sedimentation was also discussed.
opal silica microsphere monodispersity sedimentation medium
段涛 彭同江 陈吉明
西南科技大学矿物材料及应用研究所,四川 绵阳 621010;中国工程物理研究院激光聚变研究中心,四川 绵阳 621900 西南科技大学矿物材料及应用研究所,四川 绵阳 621010
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）