| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2005: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Research Abstract |
Many approaches have been proposed to fabricate highly-ordered colloidal crystals and inverse opal structures, because they are promising structures for applications in photonic materials, sensors, catalysts, and energy-harvesting coatings. 3D colloid crystals of polymer and ceramics have been prepared by various methods, such as sedimentation, vertical deposition, and isothermal heating evaporation induced self-assembly, etc. For instance, the slow sedimentation of SiO2 particles onto a patterned substrate can direct the crystallization of bulk colloidal crystals. In this project, we studied the formation of 1 and 2 dimensional hollow of Au by evaporation of Au onto 2-D PS particle array.
Two dimensional colloid arrays of PS particles on glass substrates were prepared by the spin-coating of the dispersed PS particles. 2-D array of PS particles consisted of domains, in which PS particles was packed closely. From the enlargement of SEM, it was found that PS particles in the domains did not pack in hexagonal but distorted hexagonal. Namely, the distances between particles (d) were 191 nm in the a-direction, d= 194 nm in the b-direction, d= 199 nm in the c-direction. Gold of 200 nm and 50 nm thickness was evaporated onto the particle monolayer, and then the films was immersed in toluene. We successfully obtained the 1D array of hemisphere Au film for 50 nm thickness and honeycomb and porous Au films for 200 nm.
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