Use of longitudinally displaced nanoscale electrodes for voltage sensing of biomolecules and other analytes in fluidic channels
First Claim
1. A device for voltage sensing of analytes, the device comprising:
- a fluidic channel defined by a trench in a substrate;
a pair of sensing electrodes disposed in the channel for sensing voltage therein, the pair of sensing electrodes comprising a first and a second sensing electrode disposed at two discrete laterally offset locations along a length of the fluidic channel, the pair of sensing electrodes being connected to a voltmeter for measuring a voltage sensed by the pair of sensing electrodes, and the pair of sensing electrodes not being connected to a voltage source; and
a pair of electromotive electrodes disposed at a first end and a second end of the fluidic channel for applying a potential along the fluidic channel,wherein the fluidic channel comprises a nanochannel or a microchannel.
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Accused Products
Abstract
Devices and methods for detecting an analyte are provided. Devices for voltage sensing of analytes may comprise a fluidic channel defined in a substrate, a pair of sensing electrodes disposed in a fluidic channel for sensing voltage therein, and a pair of electromotive electrodes for applying potential along the fluidic channel. The pair of sensing electrodes may include a first and second sensing electrode disposed at two discrete locations along the length of the fluidic channel and the pair of electromotive electrodes may be disposed at a first end and a second end of the fluidic channel. The fluidic channel may include a nanochannel or a microchannel. Methods for detecting an analyte may include the steps of disposing the analyte in a fluidic channel; applying a potential along the fluidic channel to generate an electrophoretic force therein such that the analyte is translocated from a first end of the fluidic channel to a second end of the fluidic channel; and measuring a voltage signal between a pair of sensing electrodes disposed in the fluidic channel as the analyte moves past the sensing electrodes.
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Citations
56 Claims
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1. A device for voltage sensing of analytes, the device comprising:
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a fluidic channel defined by a trench in a substrate; a pair of sensing electrodes disposed in the channel for sensing voltage therein, the pair of sensing electrodes comprising a first and a second sensing electrode disposed at two discrete laterally offset locations along a length of the fluidic channel, the pair of sensing electrodes being connected to a voltmeter for measuring a voltage sensed by the pair of sensing electrodes, and the pair of sensing electrodes not being connected to a voltage source; and a pair of electromotive electrodes disposed at a first end and a second end of the fluidic channel for applying a potential along the fluidic channel, wherein the fluidic channel comprises a nanochannel or a microchannel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for detecting an analyte, the method comprising the steps of:
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disposing the analyte in a fluidic channel defined by a trench in a substrate; applying a potential along the fluidic channel; translocating the analyte from a first end of the fluidic channel to a second end of the fluidic channel; and measuring a voltage signal between a pair of sensing electrodes disposed in the fluidic channel for sensing voltage therein as the analyte moves past the pair of sensing electrodes, the pair of sensing electrodes comprising a first and a second electrode disposed at two discrete laterally offset locations along a length of the fluidic channel, the pair of sensing electrodes being connected to a voltmeter for measuring a voltage sensed by the pair of sensing electrodes and the pair of sensing electrodes not being connected to a voltage source, wherein the fluidic channel comprises a nanochannel or a microchannel. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for determining a sequence of a biopolymer, the method comprising:
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disposing an analyte in a fluidic channel defined by a trench in a substrate; applying a potential along the fluidic channel; translocating the analyte from a first end of the fluidic channel to a second end of the fluidic channel; and measuring an electrical signal between a pair of sensing electrodes disposed in the fluidic channel for sensing an electrical property therein as the analyte moves past the pair of sensing electrodes, the electrical property corresponding to locations along the biopolymer, the pair of sensing electrodes comprising a first and a second electrode disposed at two discrete laterally offset locations along a length of the fluidic channel, the pair of sensing electrodes being connected to voltmeter for measuring the electrical property sensed by the pair of sensing electrodes, and the pair of sensing electrodes not being connected to a voltage source, wherein the fluidic channel comprises a nanochannel or a microchannel. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A device for sensing electrical properties of analytes, the device comprising:
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a fluidic channel defined by a trench in a substrate; a pair of sensing electrodes disposed in the channel for sensing an electrical property therein, the pair of sensing electrodes comprising a first and a second sensing electrode disposed at two discrete laterally offset locations along a length of the fluidic channel, the pair of sensing electrodes being connected to a voltmeter for measuring the electrical property sensed by the pair of sensing electrodes and the pair of sensing electrodes not being connected to a voltage source; and a pair of electromotive electrodes disposed at a first end and a second end of the fluidic channel for applying a potential along the fluidic channel, wherein the fluidic channel comprises a nanochannel or a microchannel. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56)
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Specification