Speaker
Description
Jeerasak Phooarphit¹, Ekkarat Pongophas¹, Tossaporn Lertvanithphol², Kittidhaj Dhanasiwawong², and Mati Horprathum²
¹Division of Physics, Faculty of Science and Technology, Thammasat University, Pathum Thani 12120, Thailand
² National Electronics and Computer Technology Center, Pathum Thani 12120, Thailand
Corresponding author: e_pong@tu.ac.th
The apparatus is based on the blade coating technique which is simple and economical compared to the other. The blade is attached to the substrate at an angle of 10-90 degrees and the polystyrene-beads solution is dropped in between. The whole system is then in the humidity-control box. The blade is moved by a stepping motor with the resolution of 3 µm/s and is also vibrated using a piezoelectric actuator. This vibration helps the polystyrene beads align hexagonal-close-packed. By microscopic examination, the hexagonal-close-packed monolayer of the polystyrene bead is found in extensive areas of order 10 mm².
