Chemical sensors from nanoparticle/dendrimer composite materials
First Claim
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1. A chemical sensor, comprising:
- a substrate having a surface;
a sensor medium formed on the substrate; and
a detection means for detecting a change of a physical property of the sensor medium,wherein the sensor medium comprises a network formed of non-linear polymer or oligomer molecules having linker units and of particles of at least one second component,wherein the linker units are bound to the surface of the particles of the at least one second component thereby interlinking the particles,wherein the particles of the at least one second component are nanoparticles,wherein the nanoparticles consist of a metal, andwherein the chemical sensor is exposed to an analyte and a change of a physical property of the sensor film is measured by detection, wherein the change of the physical property is a change of the electronic transport properties.
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Abstract
The invention relates to a chemical sensor comprising a sensor film formed of a nanoparticle network in which the nanoparticles are interlinked by functionalized dendrimer molecules. The dendrimers support an efficient uptake of analyte molecules by the film material and therefore enable a high sensitivity of the sensor. In addition, the chemical nature of the dendrimers strongly determines the chemical selectivity of the sensor device. By cross-linking the components of the sensitive material the sensor displays a good mechanical stability.
31 Citations
21 Claims
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1. A chemical sensor, comprising:
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a substrate having a surface; a sensor medium formed on the substrate; and a detection means for detecting a change of a physical property of the sensor medium, wherein the sensor medium comprises a network formed of non-linear polymer or oligomer molecules having linker units and of particles of at least one second component, wherein the linker units are bound to the surface of the particles of the at least one second component thereby interlinking the particles, wherein the particles of the at least one second component are nanoparticles, wherein the nanoparticles consist of a metal, and wherein the chemical sensor is exposed to an analyte and a change of a physical property of the sensor film is measured by detection, wherein the change of the physical property is a change of the electronic transport properties. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A chemical sensor, comprising:
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a substrate having a surface; a sensor medium formed on the substrate; and a detection means for detecting a change of a physical property of the sensor medium, wherein the sensor medium comprises a network formed of non-linear polymer or oligomer molecules having linker units and of particles of at least one second component, wherein the linker units are bound to the surface of the particles of the at least one second component thereby interlinking the particles, wherein the dendrimer molecules comprise an interior formed of a core and a shell of branched repeating units, and an outer shell of linker units, and wherein the dendrimer core and/or the shell of branched repeating units comprise at least one structural unit, selected from the group consisting of adamantane, cyclodextrin, crown ether, porphyrin, and phthalocyanine.
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Specification