Highly selective chemical sensor
First Claim
1. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer on a surface of an element of the transducer, wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities, said sensitive layer and the cavities therein having been prepared by in situ polymerization of polymerizable monomers and crosslinking agents as a uniform film upon said surface.
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Accused Products
Abstract
The invention relates to a highly selective chemical sensor comprising an acoustic wave transducer and a sensitive layer of so-called "molecular fingerprint" material. This is a macroporous crosslinked material having cavities whose steric and functional configuration is specifically suited to capturing molecular and/or ionic species.
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Citations
18 Claims
- 1. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer on a surface of an element of the transducer, wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities, said sensitive layer and the cavities therein having been prepared by in situ polymerization of polymerizable monomers and crosslinking agents as a uniform film upon said surface.
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4. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer, wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities and wherein the transducer is a volume acoustic wave transducer comprising a piezoelectric material inserted between two electrodes, at least one of the electrodes being coated with the sensitive layer.
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6. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer, wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities and wherein the acoustic wave transducer is a surface wave transducer, comprising a piezoelectric material on which two interlocking series of electrodes are placed, separated by a surface on which is deposited the sensitive layer, the piezoelectric material being a thin film of piezoelectric material, the sensitive layer being deposited at the surface of the film so as to generate acoustic waves of Lamb wave type.
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7. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer, wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities and wherein the acoustic wave transducer is a surface wave transducer, comprising a piezoelectric material on which two interlocking series of electrodes are placed, separated by a surface on which is deposited the sensitive layer, and further wherein the transducer comprises an intermediate layer between the sensitive layer and the piezoelectric material, in which the acoustic waves are confined.
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10. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities, the chemical structure further comprising an intermediate layer located between the sensitive layer and the transducer, ensuring the creation of strong chemical interactions between the sensitive layer and the transducer wherein the intermediate layer comprises compounds of RSH or RS-SR'"'"' type, with R and R'"'"' being non-hydrolysable organic groups having functions capable of reacting with the monomers used to obtain the crosslinked polymer, the said intermediate layer promoting adhesion of the sensitive layer to a metal electrode.
- 11. A chemical sensor which is selective for a species G comprising an acoustic wave transducer and a sensitive layer wherein the sensitive layer comprises a macroporous, crosslinked molecular fingerprint material which has cavities whose steric and functional configuration is specifically suited to capturing species G in the cavities, wherein the molecular fingerprint material is a highly crosslinked organic polymer obtained by polymerization of a composition comprising one or more monomers that are crosslinkable in the presence of species G'"'"' whose chemical structure is similar or identical to that of species G the chemical sensor further comprising a combination of a chemical sensor defined above, and a chemical sensor comprising an acoustic wave transducer and a layer consisting of a highly crosslinked polymer identical to that of the sensitive layer but obtained in the absence of species G'"'"'.
Specification