荧光素掺杂的溶胶凝胶SiO_2/甲基硅油复合薄膜的制备和光谱特性  

Preparation and Optical Properties of Flourescein Doped Sol-gel SiO_2/MSO Coating

作　　者：赵芯[1] 蒋晓东[2] 曾觉发[1] 周在德[1] 江波[1] 

机构地区：[1]四川大学化学学院,四川成都610064 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《感光科学与光化学》2007年第5期374-379,共6页Photographic Science and Photochemistry

基　　金：国家自然科学基金资助项目(10476012)

摘　　要：采用溶胶-凝胶(Sol-Gel)法制备了掺杂荧光素(FL)的SiO2/甲基硅油(MSO)复合薄膜,并且测定了这种薄膜的光谱特性.实验表明,荧光素掺杂的SiO2薄膜在350nm^450nm波长范围内激发,在520nm附近有最强的荧光发射峰;与常规SiO2膜相比较,SiO2/甲基硅油(MSO)复合薄膜的荧光发射强度可增加50%;在70℃下的加速老化实验表明,常规SiO2薄膜20天后开始出现严重的荧光猝灭现象,而复合膜放置一个月后荧光强度仅下降了15%.The dye fluorescein doped silica/methyl silicon oil （MOS） coating was prepared by the sol-gel method. The fluorescein doped SiO2/MSO coating was investigated with SPM, UV-Vis and fluorescence analysis for its optical properties. The results showed that the fluorescein doped SiO2 coating which was excitated by 350-450 nm wavelength give an emission spectrum with maximum wavelength at 520 nm. The fluorescence intensity of SiO2/MSO coating was 50 % stronger than the common SiO2 coating. Accelerated aging test at the temperature of 70 ℃ showed that fluorescence quenching taking place considerably beyond 20 days, a reduction of more than 70% was observed for the fluorescence intensity of SiO2 coating, on the other hand, the reduction of fluorescence intensity of SiO2/MSO） coating was only 15% after 20 days.

关 键 词：荧光素 甲基硅油 二氧化硅薄膜 溶胶-凝胶 

分 类 号：TB383.2[一般工业技术—材料科学与工程]