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Fine particle separation chip, fine particle separation system using the fine particle separation chip, fine particle separation method and fine particle extraction method using the partial particle separation system
Fine particle separation chip, fine particle separation system using the fine particle separation chip, fine particle separation method and fine particle extraction method using the partial particle separation system
Provided is a chip with which it is possible, using only a uniaxial operation, to detect and recover microparticles to be trapped that have been trapped. This microparticle separation chip includes a substrate, and at least three wall channel parts and at least three pillars formed on the substrate. The wall channel parts are configured such that one end is provided on the substrate and the other end opens upward, and microchannels are formed by two adjacent wall channel parts. The pillars are formed such that one end is provided on the substrate and the other end opens upward, and first trapping portions for trapping microparticles that are to be trapped are formed by two pillars. The interval between the wall surfaces of the wall channel parts is equal to or greater than X, and the first trapping portions are formed at positions set apart from the microchannels such that the interval Z1 between any two adjacent pillars forming a first trapping portion satisfies a relationship selected from Y Z1 X, 0.8Y ≤ Z1 ≤ 0.8X, Y Z1 ≤ 0.8X, and 0.8Y ≤ Z1 X, where X represents the size of the microparticles to be trapped and Y represents the size of the removed microparticles. Adjacent first trapping portions share at least one pillar, and, furthermore, are formed such that a line connecting the first trapping portions is straight. This makes it possible, using only a uniaxial operation, to recover the microparticles to be trapped.
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