Chemical sensors based on cubic nanoparticles capped with an organic coating for detecting explosives
First Claim
1. An apparatus for detecting volatile and non-volatile compounds derived from explosive materials, comprising at least one chemically sensitive sensor comprising cubic nanoparticle conductive cores capped with an organic coating, wherein the organic coating comprises a backbone and at least a first functional moiety and a second functional moiety bound to said backbone, wherein the first functional moiety is further bound to the nanoparticle conductive cores, and wherein the second functional moiety comprises at least one of an amine, an imine, an amide, an ammonium, a keto, an alcohol, an ester, a cyclodextrin, a phosphate, a thiol, a sulfonate, a sulfonyl or a carboxyl moiety.
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Abstract
The present application describes a sensor apparatus, especially an electronic nose, based on 2D films or 3D assemblies of cubic nanoparticles capped with an organic coating. The organic coating is modified with unique compositions of functional moieties, e.g. cyclodextrins, to provide the detection of volatile and non-volatile compounds derived from explosive materials, e.g. PETN, RDX, TNT etc. with very high sensitivity. The nose employs pattern recognition algorithms and methods, e.g. PCA, for detecting and quantifying specific explosive compounds.
57 Citations
23 Claims
- 1. An apparatus for detecting volatile and non-volatile compounds derived from explosive materials, comprising at least one chemically sensitive sensor comprising cubic nanoparticle conductive cores capped with an organic coating, wherein the organic coating comprises a backbone and at least a first functional moiety and a second functional moiety bound to said backbone, wherein the first functional moiety is further bound to the nanoparticle conductive cores, and wherein the second functional moiety comprises at least one of an amine, an imine, an amide, an ammonium, a keto, an alcohol, an ester, a cyclodextrin, a phosphate, a thiol, a sulfonate, a sulfonyl or a carboxyl moiety.
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10. A system having:
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(i) an apparatus for detecting volatile and non-volatile compounds derived from explosive materials comprising an array of chemically sensitive sensors comprising cubic nanoparticle conductive cores capped with an organic coating, wherein the organic coating comprises a backbone and at least a first functional moiety and a second functional moiety bound to said backbone, wherein the first functional moiety is further bound to the nanoparticle conductive cores, and wherein the second functional moiety comprises at least one of an amine, an imine, an amide, an ammonium, a keto, an alcohol, an ester, a cyclodextrin, a phosphate, a thiol, a sulfonate, a sulfonyl or a carboxyl moiety; and (ii) a learning and pattern recognition analyzer, wherein the learning and pattern recognition analyzer receives sensor output signals and compares them to stored data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for detecting volatile and non-volatile compounds derived from explosive materials in a sample, comprising the steps of:
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i) providing a system comprising an apparatus comprising an array of chemically sensitive sensors comprising cubic nanoparticle conductive cores capped with an organic coating, wherein the organic coating comprises a backbone and at least a first functional moiety and a second functional moiety bound to said backbone, wherein the first functional moiety is further bound to the nanoparticle conductive cores, and wherein the second functional moiety comprises at least one of an amine, an imine, an amide, an ammonium, a keto, an alcohol, an ester, a cyclodextrin, a phosphate, a thiol, a sulfonate, a sulfonyl or a carboxyl moiety; and
further comprising a learning and pattern recognition analyzer, wherein the learning and pattern recognition analyzer receives sensor output signals from the apparatus and compares them to stored data,ii) exposing the sensor array of the apparatus to the sample, and iii) using a pattern recognition algorithm to detect the presence of volatile and non-volatile compounds derived from explosive materials in the sample. - View Dependent Claims (21, 22, 23)
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Specification