Sensing system
AssigneeHewlett-Packard Development Company, L.P.
InventorsKevin F Peters, Xiaofeng Yang
Life of this patent
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Abstract
A ChemFET Sensing system is Described.
Claims28
A method of functionalizing a nanowire in a CHEMFET sensing system, the nanowire being connected at one part to a first electrode and at an opposite part to a second electrode, the method comprising:
- gating current at a pre-determined location of the nanowire so that a segment of the nanowire is electrically disconnected from the second electrode but remains electrically connected to the first electrode;
- applying a potential to the first electrode in order to produce a charge on an exposed area of the nanowire segment;
- contacting the nanowire segment with a solution configured to functionalize the charged exposed area with a functional agent, so as to functionalize the nanowire;
- wherein the contacting step is at least partially performed while also performing the gating and applying steps.
A method of functionalizing an array of nanowires in a CHEMFET sensing system, where each nanowire includes a sensing segment that is electrically connected to a common electrode, the method comprising:
- electrically disconnecting each nanowire sensing segment from the common electrode;
- applying a first potential to the sensing segment of at least one selected nanowire in the array;
- contacting the sensing segment of each nanowire in the array with a first solution configured to functionalize those sensing segments that are presently being held to the first potential with a functional agent, so as to functionalize those sensing segments that are presently being held to the first potential with a functional agent;
- wherein the contacting step is at least partially performed while each nanowire is electrically disconnected from the common electrode and while applying the first potential.
A method of functionalizing an array of nanowires in a CHEMFET sensing system, where each nanowire has a sensing segment and is connected at one part to a first electrode and at an opposite part to a common electrode, the method comprising:
- disconnecting each nanowire of each sensing segment from the common electrode;
- applying a first potential of pre-determined polarity to the sensing segment of at least a first nanowire in the array so as to create a potential difference between the sensing segment of the first nanowire and the sensing segment of at least one other nanowire in the array;
- contacting the sensing segment of each nanowire in the army with a solution that is configured to functionalize those sensing segments being held to the first potential with a functional agent, so as functionalize those sensing segments being held to the first potential;
- wherein the contacting step is at least partially performed while each nanowire is electrically disconnected from the common electrode and while applying the first potential.
Dependencies are inferred from the claim text.