COLL 283 |
| Shih-yung Peng, Sue-min Chang, Han-yun Cheng, and Ruey-an Doong. Department of Atomic Science, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu, 30055, Taiwan |
| Porous materials have recently attracted much attention due to their wide applications in biosensors and electronic systems. Templates for fabrication of highly porous 2D film structures are widely used. In this study, a large-scale monolayer was fabricated using polystyrene as the template. Polystyrene was arranged in an array format by self-assembly and the voids of microsphere were filled up by nanocrystalline SiO2 prepared by sol-gel method. TGA results showed a two-stage decrease in weight, the evaporation of solvent and water followed by the losing of polystyrene. SEM images demonstrated these that films had a highly ordered porous monolayer. The pore size was in the range of 70-100 nm and the thickness was of about 50 nm, depicting a monolayer structure. Film thickness and orientation of these monolayer structures can be controlled by tailoring the template sizes. AFM images confirmed that the high degree of uniform porous structure is supported by nanocrystalline SiO2. |
|
Nanoscience and Nanotechnology
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |