Nanopore sensing device, components and method of operation
Devices for improved nanopore sensing are described. An example device has a structure arranged to separate an analyte reservoir and an outlet chamber. An example device has a structure arranged to separate an analyte reservoir and an outlet chamber. The structure can include an array of nanopore structures, each nanopore structure comprising a passage for fluid connection through the structure between the analyte reservoir and outlet chamber. Control terminals can be arranged for applying a control signal to alter the electrical potential difference across that nanopore structure. Some embodiments include an electronic circuit configured to detect a signal from an electrical transduction element at each nanopore structure. Additional structural features and methods of operating and making the devices are described.
1. A device for nanopore sensing, said device comprising:
a structure arranged to separate an analyte reservoir and an outlet chamber, the structure comprising an array of nanopore structures, one or more of the nanopore structures comprising a passage for fluid connection through the structure between the analyte reservoir and outlet chamber;
drive electrodes connected respectively in the analyte reservoir and the outlet chamber for imposing an electrical potential difference across the passage;
electrical transduction elements, each element connected to the passage of a respective nanopore structure for measuring the fluidic electrical potential at that electrical transduction element in that nanopore structure; and
control terminals, each terminal connected to a respective nanopore structure for applying a control signal to alter the electrical potential difference across that nanopore structure;
wherein for each electrical transduction element, at least a portion of the electrical transduction element is physically positioned in the respective passage;
wherein the structure has:
a nanopore layer incorporating nanopores and incorporating wells for supporting the nanopores; and
a base layer incorporating channels,
wherein the nanopore layer and the base layer are sandwiched together such that each nanopore and channel are aligned to define the respective passage; and
wherein each well is located at a first end of the respective passage, wherein each electrical transduction element is configured on the opposite side of the respective well to the respective nanopore.
2. A device according to claim 1 , wherein each electrical transduction element is isolatable from a measuring circuit.
3. A device according to claim 1 , further comprising electronic circuits, wherein each electronic circuit is associated with a group of nanopore structures.
4. A device according to claim 1 , wherein the array has control circuits, each control circuit associated with a respective nanopore structure and connected to the control terminal and/or the electrical transduction element, the control circuit configured to alter at one or more of the respective nanopore structures an electrical potential imposed by the drive electrodes in response to a signal.
5. A device according to claim 4 , wherein each control circuit is associated with a group of nanopore structures.
6. A device according to claim 5 , wherein at least one of the electrical transduction element, the control circuit, or the control terminal are disposed on or below the outer surface of the structure.
7. A device having nanopore structures for sensing an analyte, the nanopore structures configured in a structure, said structure arranged to separate an analyte reservoir and an outlet chamber, each nanopore structure providing a passage for fluid connection through the structure between the analyte reservoir and outlet chamber, wherein
each nanopore structure comprises:
an electrical transduction element connected to each passage; and
an electronic circuit configured to detect a signal from the electrical transduction element, wherein each of the electronic circuits are configured to perform one of, or some combination of, store, transmit, process and communicate at least a portion of the signal to a connectable processor;
wherein each electrical transduction element defines a portion of a wall of each passage;
wherein the structure has:
a nanopore layer incorporating nanopores and incorporating wells for supporting the nanopores; and
a base layer incorporating channels,
wherein the nanopore layer and the base layer are sandwiched together such that each nanopore and channel are aligned to define the respective passage; and
wherein each well is located at a first end of the respective passage, wherein each electrical transduction element is configured on the opposite side of the respective well to the respective nanopore.
8. A device according to claim 7 , wherein each of the nanopore structures in the structure further comprise a compensation circuit.
9. A device according to claim 8 , wherein the compensation circuit has a variable gain amplifier and/or a variable capacitor in a feedback loop of the compensation circuit.
10. A device according to claim 7 , wherein each of the nanopore structures have a control terminal, each control terminal associated with a respective nanopore for applying a control signal to alter the electrical potential difference across that nanopore.
11. A device according to claim 10 , wherein the control terminal is switchably connected to a power supply to change the configurable voltage level imposed upon the pore.