Method of making a microbead array with attached biomolecules
First Claim
1. A method of making a bead array comprising a) contacting a substrate with a surface comprising discrete sites at a density of at least 100 sites per 1 mm2, with a solution comprising a population of different beads, wherein said beds do not comprise an optical signature, and b) applying energy to said substrate or said solution, or both, such that at least a subpopulation of said different beads randomly associate onto sites.
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Abstract
A method and apparatus for the manipulation of colloidal particulates and biomolecules at the interface between an insulating electrode such as silicon oxide and an electrolyte solution. Light-controlled electrokinetic assembly of particles near surfaces relics on the combination of three functional elements: the AC electric field-induced assembly of planar aggregates; the patterning of the electrolyte/silicon oxide/silicon interface to exert spatial control over the assembly process; and the real-time control of the assembly process via external illumination. The present invention provides a set of fundamental operations enabling interactive control over the creation and placement of planar arrays of several types of particles and biomolecules and manipulation of array shape and size. The present invention enables sample preparation and handling for diagnostic assays and biochemical analysis in an array format, and the functional integration of these operations. In addition, the present invention provides a procedure for the creation of material surfaces with desired properties and for the fabrication of surface-mounted optical components.
99 Citations
24 Claims
- 1. A method of making a bead array comprising a) contacting a substrate with a surface comprising discrete sites at a density of at least 100 sites per 1 mm2, with a solution comprising a population of different beads, wherein said beds do not comprise an optical signature, and b) applying energy to said substrate or said solution, or both, such that at least a subpopulation of said different beads randomly associate onto sites.
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3. A method of determining the presence of a target analyte in a sample comprising:
- a) contacting said sample with an array comprising;
i) substrate with a surface comprising discrete sites at a density of at least 100 sites per 1 mm2, wherein said sites are wells; and
ii) a population of microspheres randomly distributed on said sites, wherein said population comprises at least a first and a second subpopulation each comprising;
(a) a different bioactive agent; and
(b) a different identifier binding ligand;
b) determining the presence or absence of said target analyte; and
c) decoding a location of said bioactive agent by correlating said bioactive agent with said location, whereby said decoding comprises contacting said array with at least first and second different decoder binding ligands, whereby said first and second decoder binding ligands bind to a first and second identifier binding ligands, whereby said first and second identifier binding ligands identify said first and second bioactive agents, respectively, to thereby identify a location of said first and second bioactive agents to thereby decode said array. - View Dependent Claims (4, 5, 6, 7, 20, 21, 22, 23, 24)
- a) contacting said sample with an array comprising;
Specification