Abstract
Fine particles can be self-assembled only on hydrophilic region of patterned substrate by drawing up from the suspension. This study aims to reveal effects of suspension properties, such as surface tension, concentration of particles, and particle diameter, on the results of self assembly mechanism. The hydrophobic material was octadecyltrichlorosilan (OTS). It was transferred onto a silicon oxide surface with micro contact printing. The OTS pattern was 50mm width of line-and-space. The contact angle of a drop of water on hydrophilic material (SiO2) was 5-, and that on hydrophobic material (OTS) was 100-. It was found that the change of suspension properties have strong effects on the assembly mechanism and the coverage of particles. For example, the coverage increased with the increase of the particle concentration.
