Nanonozzle device arrays: their preparation and use for macromolecular analysis
View Patent ↗Constricted nanochannel devices suitable for use in analysis of macromolecular structure, including DNA sequencing, are disclosed. Also disclosed are methods for fabricating such devices and for analyzing macromolecules using such devices.
1. A device for analyzing a polynucleotide macromolecule, comprising:
two or more fluid reservoirs joined by a fluid pathway;
a nanochannel having an effective inner diameter between about 10 nm and about 500 nm;
a discrete constriction in or at a terminal end of the nanochannel, having an effective inner diameter that is no more than about 40% of the effective inner diameter of the nanochannel, wherein the nanochannel and the constriction are located in the fluid pathway between the reservoirs, wherein the constriction is capable of maintaining a linearized polynucleotide macromolecule passing across the constriction in a linearized form, wherein the constriction is configured to locally reduce the effective inner diameter of the nanochannel to be about 0.5 nm to about 100 nm; and
a sensor associated with the device located to detect a signal from at least a portion of the polynucleotide macromolecule as it passes through the constriction.
2. The device of claim 1 , wherein the constriction resides at one end of the nanochannel.
3. The device of claim 1 , wherein the constriction resides within the nanochannel.
4. The device of claim 1 , wherein the nanochannel comprises a length in the range of at least about 50 nm.
5. The device of claim 1 , wherein the nanochannel comprises a length in the range of at least about 100 nm.
6. The device of claim 1 , wherein the nanochannel comprises a length in the range of at least about 500 nm.
7. The device of claim 1 , wherein the nanochannel comprises a length at least equal to the length of the linearized macromolecule.
8. The device of claim 1 , wherein the nanochannel comprises an effective inner diameter in the range of from about 100 nm to about 300 nm.
9. The device of claim 1 , wherein the nanochannel comprises an effective inner diameter in the range of from about 150 nm to about 250 nm.
10. The device of claim 1 , wherein the constriction comprises an effective inner diameter in the range of from about 10 to about 50 nm.
11. The device of claim 1 , wherein the constriction comprises an effective inner diameter capable of maintaining the linearized polynucleotide macromolecule passing across the constriction in linearized form.
12. The device of claim 1 , wherein the device further comprises a gradient.
13. The device of claim 12 , wherein the gradient is selected from the group consisting of: an electroosmotic field, an electrophoretic field, a magnetic field, an electric field, a radioactive field, a mechanical force, an electroosmotic force, an electrophoretic force, an electrokinetic force, a temperature gradient, a pressure gradient, a surface property gradient, a capillary flow, and any combination thereof.
14. The device of claim 12 , wherein the gradient is capable of linearizing at least a portion of the polynucleotide macromolecule residing within at least a portion of the nanochannel.
15. The device of claim 12 , wherein the gradient is capable of transporting at least a portion of the polynucleotide macromolecule located within the nanochannel along at least a portion of the nanochannel.
16. The device of claim 12 , further comprising a gradient generator.
17. The device of claim 16 , wherein the gradient generator is selected from the group consisting of: a voltage source, a magnet, an acoustic source, a pressure source, and any combination thereof.
18. The device of claim 12 , wherein the gradient generator is capable of applying a constant gradient.
19. The device of claim 12 , wherein the gradient generator is capable of applying a variable gradient.
20. The device of claim 1 , wherein the two or more fluid reservoirs comprise the same fluid.
21. The device of claim 1 , wherein the two or more fluid reservoirs comprise different fluids.
22. The device of claim 1 , wherein the sensor is selected from the group consisting of: a charge coupled device (CCD) detection system, a complementary metal-oxide semiconductor (CMOS) detection system, a photo diode detection system, a photo-multiplying tube detection system, a scintillation detection system, a photon counting detection system, an electron spin resonance detection system, a fluorescent detection system, a photon detection system, an electrical detection system, a photographic film detection system, a chemiluminescent detection system, an enzyme detection system, an atomic force microscopy (AFM) detection system, a scanning tunneling microscopy (STM) detection system, a scanning electron microscopy (SEM) detection system, an optical detection system, a nuclear magnetic resonance (NMR) detection system, a near field detection system, a total internal reflection (TIRF) detection system, a patch clamp detection system, an electrical current detection system, an electrical amplification detection system, a resistance measurement system, a capacitive detection system, and any combination thereof.
23. The device of claim 22 , wherein the sensor is capable of monitoring one or more locations within one or more of the fluid reservoirs.
24. The device of claim 22 , wherein the sensor is capable of monitoring a location within the nanochannel.
25. The device of claim 22 , wherein the sensor is capable of monitoring a location proximate to an end of the nanochannel.
26. The device of claim 1 , further comprising an illuminator.
27. The device of claim 26 , wherein the illuminator is selected from the group consisting of: a laser, a source of visible light, a magnet, a source of ultraviolet light, a source of infrared light, and any combination thereof.
28. The device of claim 1 , further comprising a data processor.
29. The device of claim 1 , wherein the constriction is disposed within the nanochannel proximate to a terminus of the nanochannel.
30. The device of claim 1 , wherein the constriction is configured to locally reduce the effective inner diameter of the nanochannel to be about 1.5 nm to about 10 nm.
31. The device of claim 1 , wherein the nanochannel has a length that is at least 1000 nm.