Cantilevered probes having piezoelectric layer, treated section, and resistive heater, and method of use for chemical detection
First Claim
1. A chemical sensor system comprising:
- a cantilevered probe comprising;
a unitary piezoelectric drive and sense element configured to excite and detect vibration, deflection, or bending of the cantilevered probe;
a treated section selected to react with a target chemical species; and
a resistive heater thermally coupled to the treated section;
a drive circuit electrically coupled to the unitary piezoelectric drive and sense element to drive the unitary piezoelectric drive and sense element to excite vibration, deflection, or bending of the cantilevered probe upon reaction of the target chemical species with the treated section when exposed to a sample containing the target chemical species;
a sense circuit electrically coupled to the unitary piezoelectric drive and sense element to detect a change in the vibration, deflection, or bending of the cantilevered probe upon reaction of the chemical species with the treated section when exposed to a sample containing the target chemical species; and
a heater circuit electrically coupled to the resistive heater.
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Accused Products
Abstract
The invention provides a liquid cell for an atomic force microscope. The liquid cell includes a liquid cell housing with an internal cavity to contain a fluid, a plurality of conductive feedthroughs traversing the liquid cell housing between the internal cavity and a dry side of the liquid cell, a cantilevered probe coupled to the liquid cell housing, and a piezoelectric drive element disposed on the cantilevered probe. The cantilevered probe is actuated when a drive voltage is applied to the piezoelectric drive element through at least one of the conductive feedthroughs. A method of imaging an object in a liquid medium and a method of sensing a target species with the liquid cell are also disclosed.
135 Citations
27 Claims
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1. A chemical sensor system comprising:
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a cantilevered probe comprising; a unitary piezoelectric drive and sense element configured to excite and detect vibration, deflection, or bending of the cantilevered probe; a treated section selected to react with a target chemical species; and a resistive heater thermally coupled to the treated section; a drive circuit electrically coupled to the unitary piezoelectric drive and sense element to drive the unitary piezoelectric drive and sense element to excite vibration, deflection, or bending of the cantilevered probe upon reaction of the target chemical species with the treated section when exposed to a sample containing the target chemical species; a sense circuit electrically coupled to the unitary piezoelectric drive and sense element to detect a change in the vibration, deflection, or bending of the cantilevered probe upon reaction of the chemical species with the treated section when exposed to a sample containing the target chemical species; and a heater circuit electrically coupled to the resistive heater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A chemical sensor system comprising:
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a substrate including an array of cantilevered probes, each cantilevered probe comprising; a unitary piezoelectric drive and sense element configured to excite and detect vibration, deflection, or bending of the cantilevered probe; and
a treated section selected to react with a target chemical species; and
a resistive heater thermally coupled to the treated section;a drive circuit electrically coupled to each unitary piezoelectric drive and sense element to drive the unitary piezoelectric drive and sense element to excite vibration, deflection, or bending of the cantilevered probe upon reaction of the target chemical species with the treated section when exposed to a sample containing the target chemical species; a sense circuit electrically coupled to each unitary piezoelectric drive and sense element to detect a change in the vibration, deflection, or bending of the cantilevered probe upon reaction of the chemical species with the treated section when exposed to a sample containing the target chemical species; and a heater circuit electrically coupled to each resistive heater. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification