Abstract
Assembly of metal oxide fine particles has potential applications such as gas sensors. With the aim of developing high-sensitive gas sensor, self-assembly of metal oxide fine particles was attempted using dip-coating process. Hydrophilic/hydrophobic patterned substrates were drown-up from aqueous suspensions in which tin oxides or zinc oxides particles with average diameter of several ten nanometers were dispersed. Basic experiments were carried out to obtain well-structured assembly first. Then it was confirmed that the detection of specific gas is possible based on the relationship between the resistance change and gas concentration. Finally, further improvement of sensitivity is discussed.
