Document Type

Patent

Publication Date

3-18-2003

Abstract

A chemical sensor utilizing a substrate and a fluoropolymer coating is disclosed. Transducers may be connected to the substrate to generate an alternating potential across the substrate, which in turn causes the substrate to resonate due to the converse piezoelectric effect. The polymer coating absorbs the analyte, thus changing the mass of the sensor, and accordingly changing its resonant frequency. The transducers detect this change in resonant frequency to indicate to the operator that the analyte is present. The use of amorphous copolymers of 2,2-bistrifluoromethyl-4,5-difluoro-1,3-dioxole (PDD), and tetrafluoroethylene (TFE) allows for improved sensitivity and responsiveness while also allowing for robust characteristics enabling the sensor to be used in a variety of environmental conditions.

Patent Number

US 6,534,319 B1

ISURF Reference Number

2846

Assignee

Fisher Controls International, Iowa State University Research Foundation

Application Number

US 09/413,676

Date Filed

10-6-1999

Language

en

File Format

application/pdf

Included in

Chemistry Commons

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