Insulated nanoelectrode-nanopore devices and related methods
Disclosed are insulated nanoelectrode associated with nanopores, useful in macromolecular analysis devices. Also disclosed are related methods of fabrication and use.
1. A macromolecule analysis component, comprising:
a substrate having an upper surface surmounted by a layer of a first material that comprises silicon dioxide, borosilicate glass, fused silica, quartz, or any combination thereof, the substrate defining a thickness in the range of from about 5 nm to about 1000 nm;
a layer of a second material surmounting the layer of the first material;
two metallic electrodes surmounting the layer of second material and an adhesion material disposed between the two metallic electrodes and the layer of second material, the two metallic electrodes having ends separated at least in part by an aperature, and
at least one of the two metallic electrodes being at least partially surmounted by an insulating material,
the aperture having an edge and extending through the layer of first material, through the layer of second material, and through the insulating material,
the aperture's edge being defined by the layer of first material, the layer of second material, the insulating material, and the ends of the metallic electrodes, and
wherein a first of the two metallic electrodes is in eletrical commnunication with a first conductive pad, wherein a second of the two metallic electrodes is in electrical communication with a second conductive pad, and wherein the first conductive pad and the second conductive pad are capable of electrical communication with one another through an electrically-conductive trace present on the component.
2. The macromolecule analysis component of claim 1 , wherein the ends of the two metallic electrodes are separated by less than about 100 nm.
3. The macromolecule analysis component of claim 2 , wherein the ends of the two metallic electrodes are separated by from about 2.5 to about 30 nm.
4. The macromolecule analysis component of claim 1 , wherein the substrate comprises silicon.
5. The macromolecule analysis component of claim 1 , wherein the first material comprises silicon dioxide.
6. The macromolecule analysis component of claim 1 , wherein the second material comprises silicon nitride, aluminum oxide, hafnium oxide, silicon dioxide, or any combination thereof.
7. The macromolecule analysis component of claim 1 , wherein the aperture has a cross-sectional dimension in the range of from about 0.5 nm to about 10 nm.
8. The macromolecule analysis component of claim 1 , wherein the insulating material comprises titanium dioxide, aluminum oxide, hafnium oxide, or any combination thereof.
9. The macromolecule analysis component of claim 1 , wherein the insulating material is present at least a thickness of one atomic layer.
10. The macromolecule analysis component of claim 1 , wherein the substrate has a lower surface surmounted by a second layer of the first material.
11. The macromolecule analysis component of claim 10 , wherein the second layer of the first material is surmounted by a second layer of the second material.
12. The macromolecule analysis component of claim 1 , wherein the aperture in the layer of second material is in fluid communication with an aperture formed in the substrate.
13. The macromolecule analysis component of claim 1 , wherein the two metallic electrodes are characterized as having tip regions adjacent to the aperture, the tip regions being free of the insulating material.
14. The macromolecule analysis component of claim 1 , wherein the substrate defines a thickness in the range of from about 30 nm to about 70 nm.
15. The macromolecule analysis component of claim 1 , wherein the insulating material defines a thickness in the range of from about 1 nm to about 50 nm.
16. The macromolecule analysis component of claim 1 , wherein the substrate defines a thickness that is greater than the thickness of the layer of first material or the thickness of the layer of second material.
17. A method, comprising:
translocating a macromolecule through the aperture of a macromolecule analysis component, the macromolecule analysis component comprising:
a substrate having an upper surface surmounted by a layer of a first material that comprises silicon dioxide, borosilicate glass, fused silica, quartz, or any combination thereof, the substrate defining a thickness in the range of from about 5 nm to about 1000 nm;
a layer of a second material surmounting the layer of the first material;
two metallic electrodes surmounting the layer of second material and an adhesion material disposed between the two metallic electrodes and the layer of second material, the two metallic electrodes having ends separated at least in part by an aperture, and
at least one of the two metallic electrodes being at least partially surmounted by an insulating material,
the aperture having an edge and extending through the layer of first material, through the layer of second material, and through the insulating material,
the aperture's edge being defined by the layer of first material, the layer of second material, the insulating material, and the ends of the metallic electrodes, and
wherein a first of the two metallic electrodes is in eletrical communicatin with a first conductive pad, wherein a second of the two metallic electrodes is in electrical communication with a second conductive pad, and wherein the first conductive pad and the second conductive pad are capable of electrical communication with one another through an electrically-conductive trace present on the component, and
collecting a signal related to the translocation.