Apparatus and microchip for sorting micro particles
First Claim
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;
two or more containers that collect 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 at least the orifice portion of the microchip and the space outside the microchip in which the liquid drop discharged through the orifice moves are arranged in a cavity of a cartridge having light transmittance for light from the optical detection means.
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Accused Products
Abstract
In one example embodiment, a micro-particle sorting apparatus includes: (a) 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 chip; (b) an oscillating element for transforming the liquid into a liquid drop and discharging the liquid drop at the orifice; (c) a charge means for adding an electric charge to the discharged liquid drop; (d) 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; (e) paired electrodes opposed to each other while sandwiching the moving liquid drop along a movement direction of the liquid drop discharged into the space outside the chip; and (f) two containers that collect the liquid drop passing between the paired electrodes.
49 Citations
10 Claims
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1. A micro-particle sorting apparatus comprising:
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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; two or more containers that collect 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 at least the orifice portion of the microchip and the space outside the microchip in which the liquid drop discharged through the orifice moves are arranged in a cavity of a cartridge having light transmittance for light from the optical detection means. - View Dependent Claims (2, 3, 4)
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5. A micro-particle sorting apparatus comprising:
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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 for transforming the liquid into a liquid drop and discharging 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; and 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
two or more containers that collect the liquid drop passing between the paired electrodes,wherein a cross-section area of the flow path at a location of the orifice is set to be smaller than a cross-section area 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 at least the orifice portion of the microchip and the space outside the microchip in which the liquid discharged through the orifice moves are arranged in a cavity of a cartridge having light transmittance for light from the optical detection mean.
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6. A microchip comprising:
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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; a predetermined location of the flow path configured as a light-irradiated portion to be irradiated with light from an optical detection means for detecting an optical property of the micro particle flowing therethrough; and a micro tube that introduces, into a laminar flow of liquid T flowing through the flow path, a laminar flow of another liquid S containing micro particle, upstream of the liquid-delivering direction with respect to the light-irradiated portion, 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 the light-irradiated portio; and
wherein the micro tube is formed of a metal on which voltage can be applied. - View Dependent Claims (7, 8, 9)
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10. A microchip comprising:
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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; a predetermined location of the flow path configured as a light-irradiated portion to be irradiated with light from an optical detection means for detecting an optical property of the micro particle flowing therethrough; and a micro tube that introduces, into a laminar flow of liquid T flowing through the flow path, a laminar flow of another liquid S containing micro particle, upstream of the liquid-delivering direction with respect to the light-irradiated portion, wherein a cross-section area of the flow path at a location of the orifice is set to be smaller than a cross-section area of the flow path at the light-irradiated portion; and
wherein the micro tube is formed of a metal on which voltage can be applied.
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Specification