2012 Fiscal Year Final Research Report

Creation of micro droplet collider and application to fluid and chemical operations

Research Project

Project/Area Number	23651135
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Microdevices/Nanodevices
Research Institution	The University of Tokyo
Principal Investigator	MAWATARI Kazuma 東京大学, 大学院・工学系研究科, 准教授 (60415974)
Project Period (FY)	2011 – 2012
Keywords	マイクロ流体 / ラプラス圧 / 液滴発射 / 液滴衝突 / 流体操作
Research Abstract	In this research, a droplet in air is accelerated to more than 10m/s and collided with another droplet by developing new fluidic control methods for focusing the kinetic energy to the collision at the droplet surface and inducing new chemical reactions. The microscale droplet was prepared using Laplace pressure induced by partial hydrophobic surface modification. The droplet was converted to ice phase by partial temperature control. The ice was fixed at the low temperature area and adhered to the wall. The air pressure applied was increased to 400kPa, and the droplet was shot by overcoming the adhering force. As a result, the droplet was accelerated to 20 m/s.