Chemical sensor with block copolymer coatings

Details Chemical sensor with block copolymer coatings Chemical sensor with block copolymer coatings

G - Physics

01

N

G01N 27/26 (2006.01) C08L 51/00 (2006.01) C09D 151/00 (2006.01) C09D 153/00 (2006.01) C09D 153/02 (2006.01) G01N 27/00 (2006.01) G01N 29/02 (2006.01)

Patent

CA 2369720

Block copolymer or graft copolymer coatings and blends of block copolymers or graft copolymers with homopolymers and resins are used as a chemical absorption layer on a high performance, mass-sensitive, acoustic wave-based sensing device. The use of block copolymer coating materials containing polymer blocks with high and low glass transition temperatures within the same molecule allows for tailoring of the absorption and physical characteristics of the absorptive layer on a sensor. The coatings form a composition that exhibits the necessary physical properties for use as the absorptive coating in an acoustic wave-sensing device. These materials have favorable acoustic properties over extended temperature ranges, resulting in a wider operating temperature range for acoustic wave-based sensing of volatile organic compounds. Moreover, the improved acoustic properties enable thicker coatings to be used, which increases the detection sensitivity of the sensor.

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