Nanopore arrays for sequencing nucleic acids
To form a layer separating two volumes of aqueous solution, there is used an apparatus comprising elements defining a chamber, the elements including a body of non-conductive material having formed therein at least one recess opening into the chamber, the recess containing an electrode. A pre-treatment coating of a hydrophobic fluid is applied to the body across the recess. Aqueous solution, having amphiphilic molecules added thereto, is flowed across the body to cover the recess so that aqueous solution is introduced into the recess from the chamber and a layer of the amphiphilic molecules forms across the recess separating a volume of aqueous solution introduced into the recess from the remaining volume of aqueous solution.
1. A device for polymer sequencing comprising:
an array of nanopores,
above the array of nanopores, in fluidic contact with the array of nanopores, an upper fluidic region comprising an upper electrode, the upper fluidic region comprising polymer molecules,
below the array of nanopores, an array of discrete fluidic regions, each discrete fluidic region in fluidic contact with a nanopore of the array of nanopores, and each discrete fluidic region comprising a lower electrode and internal surfaces, wherein there is no direct fluidic contact between the discrete fluidic regions,
a pre-treatment coating of a hydrophobic fluid applied to the internal surfaces of each discrete fluidic region, wherein the hydrophobic fluid does not cover the lower electrode,
an array of layers of amphiphilic molecules, wherein each layer of amphiphilic molecules separates one of the discrete fluidic regions from the upper fluidic region,
wherein each nanopore of the array of nanopores is disposed within one of the layers of amphiphilic molecules, and
an array of electronic circuits below the array of discrete fluidic regions, each electronic circuit comprising an amplifier in electrical contact with the fluidic region above it.
2. The device of claim 1 , wherein voltage is applied between the upper electrode and the lower electrode of each discrete fluidic region, resulting in removal of excess hydrophobic fluid covering the lower electrode.
3. The device of claim 1 , wherein the polymer molecules comprise nucleic acid molecules.
4. The device of claim 1 , wherein the nucleic acid molecules comprise DNA.
5. The device of claim 1 , wherein the device comprises a semiconductor substrate in which the array of electronic circuits is formed.
6. The device of claim 1 , wherein the array of electronic circuits further comprise analog to digital converters, memory, or clock circuits.
7. The device of claim 1 , wherein each discrete fluidic region has two electrodes, one disposed below each discrete fluidic region and one disposed above each discrete fluidic region, wherein the one disposed above each discrete fluidic region acts as a drive electrode, and the one disposed below each discrete fluidic region acts as a measurement electrode.
8. The device of claim 1 , wherein the nanopores comprise protein nanopores.
9. The device of claim 8 , wherein the protein nanopores comprise alpha-hemolysin proteins.
10. The device of claim 8 , wherein the protein nanopores are within biological membranes.
11. The device of claim 1 , wherein the device comprises a substrate comprising a semiconductor component bound to an insulator component.
12. The device of claim 1 , wherein each layer of amphiphilic molecules has an electrical resistance of at least 100 GO.
13. The device of claim 1 , wherein the array of nanopores comprises up to 128 nanopores.
14. The device of claim 7 , wherein the electrode disposed above each discrete fluidic region is a single electrode common to all of the discrete fluidic regions.
15. The device of claim 1 , wherein each layer of amphiphilic molecules has a diameter of 10 μm to 500 μm.
16. The device of claim 1 , further comprising an array of conductive paths extending from the array of discrete fluidic regions to the array of electronic circuits.
17. The device of claim 1 , wherein the array of layers of amphiphilic molecules comprise lipids.
18. The device of claim 17 , wherein the lipids form a lipid bilayer.