| US 7,547,415 B2 | ||
| Fluid chip, fluid movement control method using the same, and chemical reaction apparatus | ||
| Yukari Hataoka, Osaka (Japan); Tetsuo Yukimasa, Nara (Japan); and Hiroaki Oka, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Filed on Aug. 28, 2006, as Appl. No. 11/510,726. | ||
| Claims priority of application No. 2005-034591 (JP), filed on Feb. 10, 2005. | ||
| Prior Publication US 2006/0292032 A1, Dec. 28, 2006 | ||
| Int. Cl. B01L 3/00 (2006.01) | ||
| U.S. Cl. 422—99 [422/100; 422/102; 422/103; 436/180; 137/599.01; 251/65] | 26 Claims |
| 1. A fluid chip, comprising:
a liquid support for supporting a liquid;
a fluid passage defined by being surrounded by the liquid support and through which the liquid moves; and
a plurality of magnetic particles disposed in the fluid passage,
wherein reversible switching is possible between a closed state in which a first magnetic force acts on the magnetic particles
so as to aggregate the magnetic particles, thereby blocking the fluid passage and cutting off a flow of the liquid, and an
open state in which a second magnetic force weaker than the first magnetic force acts on the magnetic particles so as to disperse
the magnetic particles along a part of a wall of the fluid passage, thereby opening the fluid passage and allowing the liquid
to flow, and
wherein at the closed state at least some of the plurality of magnetic particles contact with both of the liquid support and
the liquid.
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