APPARATUS AND MICROCHIP FOR SORTING MICRO PARTICLES

摘要

A micro-particle sorting apparatus is provided including a microchip in which a flow path through which liquid containing a micro particle flows and an orifice; an oscillating element configured to transform the liquid into a liquid drop; a charge means for adding an electric charge to the discharged liquid drop; an optical detection means; paired electrodes sandwiching the moving liquid drop; and at least a container that collects the liquid drop, and wherein the flow path is configured to gradually decrease, from upstream of the orifice, in cross-section area perpendicular to the liquid-delivering direction between the location at which the optical property is detected and the location of the orifice.

主权项

1. A micro-particle sorting apparatus comprising:
a microchip in which a flow path through which liquid containing a micro particle flows and an orifice through which the liquid flowing through the flow path is discharged into a space outside the microchip; an oscillating element configured to transform the liquid into a liquid drop and discharge the liquid drop at the orifice; a charge means for adding an electric charge to the discharged liquid drop; an optical detection means that detects an optical property of the micro particle flowing through the flow path, upstream of a liquid-delivering direction with respect to the orifice; paired electrodes provided so as to be opposed to each other while sandwiching the moving liquid drop therebetween along a movement direction of the liquid drop discharged into the space outside the microchip; and at least a container that collects the liquid drop passing between the paired electrodes, wherein a width of the flow path and a depth of the flow path at a location of the orifice are set to be smaller than a width of the flow path and a depth of the flow path at a location at which the optical property of the micro particle is detected by the optical detection means; and wherein the flow path is configured to gradually decrease, from upstream of the orifice, in cross-section area perpendicular to the liquid-delivering direction between the location at which the optical property is detected and the location of the orifice.