Method of concentrating beads in a droplet
First Claim
1. A method of concentrating beads in a droplet, the method comprising:
- (a) providing a droplet actuator comprising;
(i) an interior droplet operations volume; and
(ii) a reservoir exterior to the interior volume;
(iii) a first substrate;
(iv) a second substrate separated from the first substrate to provide the interior volume between the first substrate and the second substrate, comprising the reservoir and a liquid path;
(v) electrodes associated with the first and/or second substrate and arranged for conducting one or more droplet operations in the interior volume; and
(vi) a magnet providing a magnetic field arranged to attract magnetically responsive beads from the liquid reservoir into the interior volume;
(b) establishing a droplet in the liquid path extending from the reservoir into the interior volume;
(c) providing a first concentration of magnetically responsive beads in the portion of the droplet which is in the reservoir;
(d) magnetically attracting the magnetically responsive beads through the liquid path into the portion of the droplet which is in the interior volume; and
(e) forming a droplet comprising a second concentration of magnetically responsive beads in the interior volume, wherein the second concentration of magnetically responsive beads in the droplet formed in the interior volume is greater than the first concentration of magnetically responsive beads provided in the portion of the droplet which is in the reservoir; and
(f) conducting one or more droplet operations on the droplet in the interior volume via electrowetting.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods of concentrating beads in a droplet and/or loading beads on a fluidic device are provided, including among other things, a method of concentrating beads in a droplet, the method comprising: (a) providing a droplet actuator comprising: (i) an interior droplet operations volume; and (ii) a reservoir exterior to the interior volume; (iii) a droplet established in a liquid path extending from the reservoir into the interior volume; (b) providing magnetically responsive beads in the portion of the droplet which is in the reservoir; (c) magnetically attracting the magnetically responsive beads through the liquid path into the portion of the droplet which is in the interior volume; and (d) forming a droplet comprising one or more of the magnetically responsive beads in the interior volume.
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Citations
22 Claims
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1. A method of concentrating beads in a droplet, the method comprising:
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(a) providing a droplet actuator comprising; (i) an interior droplet operations volume; and (ii) a reservoir exterior to the interior volume; (iii) a first substrate; (iv) a second substrate separated from the first substrate to provide the interior volume between the first substrate and the second substrate, comprising the reservoir and a liquid path; (v) electrodes associated with the first and/or second substrate and arranged for conducting one or more droplet operations in the interior volume; and (vi) a magnet providing a magnetic field arranged to attract magnetically responsive beads from the liquid reservoir into the interior volume; (b) establishing a droplet in the liquid path extending from the reservoir into the interior volume; (c) providing a first concentration of magnetically responsive beads in the portion of the droplet which is in the reservoir; (d) magnetically attracting the magnetically responsive beads through the liquid path into the portion of the droplet which is in the interior volume; and (e) forming a droplet comprising a second concentration of magnetically responsive beads in the interior volume, wherein the second concentration of magnetically responsive beads in the droplet formed in the interior volume is greater than the first concentration of magnetically responsive beads provided in the portion of the droplet which is in the reservoir; and (f) conducting one or more droplet operations on the droplet in the interior volume via electrowetting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification