Patent
US 10,890,550High sensitivity broad-target porous graphene oxide capacitive vapor sensor
Raz JELINEK
US
Copyright © 2026 Matter42. All rights reserved.
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US 10,890,550Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Figures 2A-2D depict NH₃ sensing results of the p re sent invention;
Figure 2B depicts capacitance modulation in different ammonia vapor concentrations indicated in ppm above the relative capacitance signals;
Figure 2C depicts graphical representation of the percentage capacitance response, high-lighting the linearity in the range of 1-70 ppm.
Figures 3A and 3 B depict the response and recovery time of ammonia:
Figure 3B depicts the p G₀/IDE (i. response time-20 seconds; ii. recovery SVG 15671490.10-19-2017.J₈YQ₇L₂ZRXEAPX1.SPEC.3.22.1645.2256.1768.2292.svg 0.12 0.41 Chemistry Black and white O seconds).
Figures 4A-4C depict the humidity sensing.
Figure 4B depicts the response (i) and recovery (ii) profile recorded at 7 5*/o RH;
Figure 4 C depicts the concentration-dependent capacitance response graph. Figures S A and S B the sensing of volatile organic compounds (VOCs) by the p G₀ capacitive sensor of the present invention. Figure S A depicts sensing of Ethanol (200 CLEAN S U BSTIT UTE SPECIFICATION ppm);
Figure 5 B depicts sensing of phenol (150 ppm). Percentage response (left) and response/recovery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figures 6A- 6 D depict the vapor specificity using functionalized p G₀ as the dielectric core of the capacitive sensors of the present invention. Shown are the response/recycling curves recorded upon addition of the vapors indicated according to the color code, all at a concentration of 180 ppm. …
Figure 6B depicts Phenyl-pG O (GO derivative 1);
Figure 6C depicts dodecyl-pG O (GO derivative 2);
Figure 6 D depicts ethanol-pG O (GO derivative 3).
Figures 7A and 7B depict an array-based color code identification of different vapors using the functionalized p G₀ capacitive sensor of the present invention. The colors indicated in the diagram correspond to the percentage capacitance response, according to the color keys shown on the right.
Figure 7B depicts nonpolar vapors (negative capacitance changes). The concentration of all vapors was 18 0 ppm and the relative humidity was 75 %.
Figure 8A depicts C O₂ and
Figures 8B-8D depict other VOCs sensing. The percentage response vs. concentrations (left) and response/re covery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figure 8C depicts the sensing of acetonitrile;
Figure 8D depicts the sensing of benzene.
Figure 9A depicts the scheme for process of example 1 A for the preparation of p G₀ utilizing freeze drying method;
Figure 9B is a scheme depicting the process of Example 1 B for the preparation of p G₀ using heating.
Figure 10 depicts the capacitive gas sensing properties (humidity and ammonia) of a p G₀ sensor prepared according to the process of Example lB.
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
Figures 11 A nd 11 B). CLEAN S U BSTIT UTE SPECIFICATION
Figure 12 is a scheme depicting several p re paration methods of functionalized pGOs
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A capacitive vapor sensor comprising a pair of parallel metallic electrodes separated by a dielectric material, wherein said dielectric material is porous graphene oxide physically immobilized onto surfaces of the pair of metallic electrodes, further wherein said sensor is configured to change dielectric properties upon contacting vapor target molecules. Previously presented
The sensor of claim 1 wherein said porous graphene oxide is a functionalized graphene oxide. Previously presented
The sensor of claim 1, whereas the pair of parallel metallic electrodes are interdigitated electrodes. Previously presented
An array of capacitive vapor sensors, constructed as an array of at least two array elements, wherein each array element comprises the sensor of claim 1, further wherein each array element comprises a different functionalized or non-functionalized porous graphene oxide. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample comprising the steps of exposing the sensor of claim 1 to said vapor sample and recording a change in capacitance upon exposure. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample, said method comprising passing a vapor sample through the capacitive vapor sensor of claim 1. Original
An in-situ process, said process comprising: i) Adsorbing graphene oxide on an electrode surface, ii) Creating pores in said graphene oxide, to obtain porous graphene oxide adsorbed on said electrode surface. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution or a graphene oxide suspension. Withdrawn
The process of claim 4, wherein creating said pores in said graphene oxide is obtained by a process selected from hydrothermal, irradiation, polymerization, grafting, template based, annealing, electroplating deposition, oxidative coupling of primary amines, steam etching, expansion and freeze-drying. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution, followed by slow drying said graphene oxide solution at room temperature to obtain an assembly consisting of an electrode coated with a partially-dried graphene oxide, further wherein said creating of said pores in said graphene oxide is obtained by freeze- drying said assembly to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide- ammonium carbonate suspension, to obtain an assembly consisting of an electrode coated with said graphene oxide-ammonium carbonate suspension, further wherein said creating of said pores in said graphene oxide is obtained by heating said assembly to about 100 0 C for several minutes to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said graphene oxide is a functionalized graphene oxide. Withdrawn
A capacitive vapor sensor prepared according to the process of claim 4. Previously presented
Layer stacks claimed or described, ordered top of device to substrate.
capacitive vapor sensor
capacitive vapor sensor with interdigitated electrodes
Materials described outside the worked examples.
porous graphene oxide
functionalized graphene oxide
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 10–15 sec | — |
Duration |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,890,550Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Figures 2A-2D depict NH₃ sensing results of the p re sent invention;
Figure 2B depicts capacitance modulation in different ammonia vapor concentrations indicated in ppm above the relative capacitance signals;
Figure 2C depicts graphical representation of the percentage capacitance response, high-lighting the linearity in the range of 1-70 ppm.
Figures 3A and 3 B depict the response and recovery time of ammonia:
Figure 3B depicts the p G₀/IDE (i. response time-20 seconds; ii. recovery SVG 15671490.10-19-2017.J₈YQ₇L₂ZRXEAPX1.SPEC.3.22.1645.2256.1768.2292.svg 0.12 0.41 Chemistry Black and white O seconds).
Figures 4A-4C depict the humidity sensing.
Figure 4B depicts the response (i) and recovery (ii) profile recorded at 7 5*/o RH;
Figure 4 C depicts the concentration-dependent capacitance response graph. Figures S A and S B the sensing of volatile organic compounds (VOCs) by the p G₀ capacitive sensor of the present invention. Figure S A depicts sensing of Ethanol (200 CLEAN S U BSTIT UTE SPECIFICATION ppm);
Figure 5 B depicts sensing of phenol (150 ppm). Percentage response (left) and response/recovery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figures 6A- 6 D depict the vapor specificity using functionalized p G₀ as the dielectric core of the capacitive sensors of the present invention. Shown are the response/recycling curves recorded upon addition of the vapors indicated according to the color code, all at a concentration of 180 ppm. …
Figure 6B depicts Phenyl-pG O (GO derivative 1);
Figure 6C depicts dodecyl-pG O (GO derivative 2);
Figure 6 D depicts ethanol-pG O (GO derivative 3).
Figures 7A and 7B depict an array-based color code identification of different vapors using the functionalized p G₀ capacitive sensor of the present invention. The colors indicated in the diagram correspond to the percentage capacitance response, according to the color keys shown on the right.
Figure 7B depicts nonpolar vapors (negative capacitance changes). The concentration of all vapors was 18 0 ppm and the relative humidity was 75 %.
Figure 8A depicts C O₂ and
Figures 8B-8D depict other VOCs sensing. The percentage response vs. concentrations (left) and response/re covery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figure 8C depicts the sensing of acetonitrile;
Figure 8D depicts the sensing of benzene.
Figure 9A depicts the scheme for process of example 1 A for the preparation of p G₀ utilizing freeze drying method;
Figure 9B is a scheme depicting the process of Example 1 B for the preparation of p G₀ using heating.
Figure 10 depicts the capacitive gas sensing properties (humidity and ammonia) of a p G₀ sensor prepared according to the process of Example lB.
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
Figures 11 A nd 11 B). CLEAN S U BSTIT UTE SPECIFICATION
Figure 12 is a scheme depicting several p re paration methods of functionalized pGOs
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A capacitive vapor sensor comprising a pair of parallel metallic electrodes separated by a dielectric material, wherein said dielectric material is porous graphene oxide physically immobilized onto surfaces of the pair of metallic electrodes, further wherein said sensor is configured to change dielectric properties upon contacting vapor target molecules. Previously presented
The sensor of claim 1 wherein said porous graphene oxide is a functionalized graphene oxide. Previously presented
The sensor of claim 1, whereas the pair of parallel metallic electrodes are interdigitated electrodes. Previously presented
An array of capacitive vapor sensors, constructed as an array of at least two array elements, wherein each array element comprises the sensor of claim 1, further wherein each array element comprises a different functionalized or non-functionalized porous graphene oxide. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample comprising the steps of exposing the sensor of claim 1 to said vapor sample and recording a change in capacitance upon exposure. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample, said method comprising passing a vapor sample through the capacitive vapor sensor of claim 1. Original
An in-situ process, said process comprising: i) Adsorbing graphene oxide on an electrode surface, ii) Creating pores in said graphene oxide, to obtain porous graphene oxide adsorbed on said electrode surface. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution or a graphene oxide suspension. Withdrawn
The process of claim 4, wherein creating said pores in said graphene oxide is obtained by a process selected from hydrothermal, irradiation, polymerization, grafting, template based, annealing, electroplating deposition, oxidative coupling of primary amines, steam etching, expansion and freeze-drying. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution, followed by slow drying said graphene oxide solution at room temperature to obtain an assembly consisting of an electrode coated with a partially-dried graphene oxide, further wherein said creating of said pores in said graphene oxide is obtained by freeze- drying said assembly to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide- ammonium carbonate suspension, to obtain an assembly consisting of an electrode coated with said graphene oxide-ammonium carbonate suspension, further wherein said creating of said pores in said graphene oxide is obtained by heating said assembly to about 100 0 C for several minutes to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said graphene oxide is a functionalized graphene oxide. Withdrawn
A capacitive vapor sensor prepared according to the process of claim 4. Previously presented
Layer stacks claimed or described, ordered top of device to substrate.
capacitive vapor sensor
capacitive vapor sensor with interdigitated electrodes
Materials described outside the worked examples.
porous graphene oxide
functionalized graphene oxide
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 10–15 sec | — |
Duration |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,890,550Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Figures 2A-2D depict NH₃ sensing results of the p re sent invention;
Figure 2B depicts capacitance modulation in different ammonia vapor concentrations indicated in ppm above the relative capacitance signals;
Figure 2C depicts graphical representation of the percentage capacitance response, high-lighting the linearity in the range of 1-70 ppm.
Figures 3A and 3 B depict the response and recovery time of ammonia:
Figure 3B depicts the p G₀/IDE (i. response time-20 seconds; ii. recovery SVG 15671490.10-19-2017.J₈YQ₇L₂ZRXEAPX1.SPEC.3.22.1645.2256.1768.2292.svg 0.12 0.41 Chemistry Black and white O seconds).
Figures 4A-4C depict the humidity sensing.
Figure 4B depicts the response (i) and recovery (ii) profile recorded at 7 5*/o RH;
Figure 4 C depicts the concentration-dependent capacitance response graph. Figures S A and S B the sensing of volatile organic compounds (VOCs) by the p G₀ capacitive sensor of the present invention. Figure S A depicts sensing of Ethanol (200 CLEAN S U BSTIT UTE SPECIFICATION ppm);
Figure 5 B depicts sensing of phenol (150 ppm). Percentage response (left) and response/recovery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figures 6A- 6 D depict the vapor specificity using functionalized p G₀ as the dielectric core of the capacitive sensors of the present invention. Shown are the response/recycling curves recorded upon addition of the vapors indicated according to the color code, all at a concentration of 180 ppm. …
Figure 6B depicts Phenyl-pG O (GO derivative 1);
Figure 6C depicts dodecyl-pG O (GO derivative 2);
Figure 6 D depicts ethanol-pG O (GO derivative 3).
Figures 7A and 7B depict an array-based color code identification of different vapors using the functionalized p G₀ capacitive sensor of the present invention. The colors indicated in the diagram correspond to the percentage capacitance response, according to the color keys shown on the right.
Figure 7B depicts nonpolar vapors (negative capacitance changes). The concentration of all vapors was 18 0 ppm and the relative humidity was 75 %.
Figure 8A depicts C O₂ and
Figures 8B-8D depict other VOCs sensing. The percentage response vs. concentrations (left) and response/re covery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figure 8C depicts the sensing of acetonitrile;
Figure 8D depicts the sensing of benzene.
Figure 9A depicts the scheme for process of example 1 A for the preparation of p G₀ utilizing freeze drying method;
Figure 9B is a scheme depicting the process of Example 1 B for the preparation of p G₀ using heating.
Figure 10 depicts the capacitive gas sensing properties (humidity and ammonia) of a p G₀ sensor prepared according to the process of Example lB.
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
Figures 11 A nd 11 B). CLEAN S U BSTIT UTE SPECIFICATION
Figure 12 is a scheme depicting several p re paration methods of functionalized pGOs
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A capacitive vapor sensor comprising a pair of parallel metallic electrodes separated by a dielectric material, wherein said dielectric material is porous graphene oxide physically immobilized onto surfaces of the pair of metallic electrodes, further wherein said sensor is configured to change dielectric properties upon contacting vapor target molecules. Previously presented
The sensor of claim 1 wherein said porous graphene oxide is a functionalized graphene oxide. Previously presented
The sensor of claim 1, whereas the pair of parallel metallic electrodes are interdigitated electrodes. Previously presented
An array of capacitive vapor sensors, constructed as an array of at least two array elements, wherein each array element comprises the sensor of claim 1, further wherein each array element comprises a different functionalized or non-functionalized porous graphene oxide. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample comprising the steps of exposing the sensor of claim 1 to said vapor sample and recording a change in capacitance upon exposure. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample, said method comprising passing a vapor sample through the capacitive vapor sensor of claim 1. Original
An in-situ process, said process comprising: i) Adsorbing graphene oxide on an electrode surface, ii) Creating pores in said graphene oxide, to obtain porous graphene oxide adsorbed on said electrode surface. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution or a graphene oxide suspension. Withdrawn
The process of claim 4, wherein creating said pores in said graphene oxide is obtained by a process selected from hydrothermal, irradiation, polymerization, grafting, template based, annealing, electroplating deposition, oxidative coupling of primary amines, steam etching, expansion and freeze-drying. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution, followed by slow drying said graphene oxide solution at room temperature to obtain an assembly consisting of an electrode coated with a partially-dried graphene oxide, further wherein said creating of said pores in said graphene oxide is obtained by freeze- drying said assembly to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide- ammonium carbonate suspension, to obtain an assembly consisting of an electrode coated with said graphene oxide-ammonium carbonate suspension, further wherein said creating of said pores in said graphene oxide is obtained by heating said assembly to about 100 0 C for several minutes to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said graphene oxide is a functionalized graphene oxide. Withdrawn
A capacitive vapor sensor prepared according to the process of claim 4. Previously presented
Layer stacks claimed or described, ordered top of device to substrate.
capacitive vapor sensor
capacitive vapor sensor with interdigitated electrodes
Materials described outside the worked examples.
porous graphene oxide
functionalized graphene oxide
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 10–15 sec | — |
Duration |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,890,550Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Figures 2A-2D depict NH₃ sensing results of the p re sent invention;
Figure 2B depicts capacitance modulation in different ammonia vapor concentrations indicated in ppm above the relative capacitance signals;
Figure 2C depicts graphical representation of the percentage capacitance response, high-lighting the linearity in the range of 1-70 ppm.
Figures 3A and 3 B depict the response and recovery time of ammonia:
Figure 3B depicts the p G₀/IDE (i. response time-20 seconds; ii. recovery SVG 15671490.10-19-2017.J₈YQ₇L₂ZRXEAPX1.SPEC.3.22.1645.2256.1768.2292.svg 0.12 0.41 Chemistry Black and white O seconds).
Figures 4A-4C depict the humidity sensing.
Figure 4B depicts the response (i) and recovery (ii) profile recorded at 7 5*/o RH;
Figure 4 C depicts the concentration-dependent capacitance response graph. Figures S A and S B the sensing of volatile organic compounds (VOCs) by the p G₀ capacitive sensor of the present invention. Figure S A depicts sensing of Ethanol (200 CLEAN S U BSTIT UTE SPECIFICATION ppm);
Figure 5 B depicts sensing of phenol (150 ppm). Percentage response (left) and response/recovery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figures 6A- 6 D depict the vapor specificity using functionalized p G₀ as the dielectric core of the capacitive sensors of the present invention. Shown are the response/recycling curves recorded upon addition of the vapors indicated according to the color code, all at a concentration of 180 ppm. …
Figure 6B depicts Phenyl-pG O (GO derivative 1);
Figure 6C depicts dodecyl-pG O (GO derivative 2);
Figure 6 D depicts ethanol-pG O (GO derivative 3).
Figures 7A and 7B depict an array-based color code identification of different vapors using the functionalized p G₀ capacitive sensor of the present invention. The colors indicated in the diagram correspond to the percentage capacitance response, according to the color keys shown on the right.
Figure 7B depicts nonpolar vapors (negative capacitance changes). The concentration of all vapors was 18 0 ppm and the relative humidity was 75 %.
Figure 8A depicts C O₂ and
Figures 8B-8D depict other VOCs sensing. The percentage response vs. concentrations (left) and response/re covery time profiles (right. i and ii correspond to response and recovery times, respectively).
Figure 8C depicts the sensing of acetonitrile;
Figure 8D depicts the sensing of benzene.
Figure 9A depicts the scheme for process of example 1 A for the preparation of p G₀ utilizing freeze drying method;
Figure 9B is a scheme depicting the process of Example 1 B for the preparation of p G₀ using heating.
Figure 10 depicts the capacitive gas sensing properties (humidity and ammonia) of a p G₀ sensor prepared according to the process of Example lB.
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
Figures 11 A nd 11 B). CLEAN S U BSTIT UTE SPECIFICATION
Figure 12 is a scheme depicting several p re paration methods of functionalized pGOs
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A capacitive vapor sensor comprising a pair of parallel metallic electrodes separated by a dielectric material, wherein said dielectric material is porous graphene oxide physically immobilized onto surfaces of the pair of metallic electrodes, further wherein said sensor is configured to change dielectric properties upon contacting vapor target molecules. Previously presented
The sensor of claim 1 wherein said porous graphene oxide is a functionalized graphene oxide. Previously presented
The sensor of claim 1, whereas the pair of parallel metallic electrodes are interdigitated electrodes. Previously presented
An array of capacitive vapor sensors, constructed as an array of at least two array elements, wherein each array element comprises the sensor of claim 1, further wherein each array element comprises a different functionalized or non-functionalized porous graphene oxide. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample comprising the steps of exposing the sensor of claim 1 to said vapor sample and recording a change in capacitance upon exposure. Previously presented
A method for detecting the presence of one or more vapor analytes in a vapor sample, said method comprising passing a vapor sample through the capacitive vapor sensor of claim 1. Original
An in-situ process, said process comprising: i) Adsorbing graphene oxide on an electrode surface, ii) Creating pores in said graphene oxide, to obtain porous graphene oxide adsorbed on said electrode surface. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution or a graphene oxide suspension. Withdrawn
The process of claim 4, wherein creating said pores in said graphene oxide is obtained by a process selected from hydrothermal, irradiation, polymerization, grafting, template based, annealing, electroplating deposition, oxidative coupling of primary amines, steam etching, expansion and freeze-drying. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide solution, followed by slow drying said graphene oxide solution at room temperature to obtain an assembly consisting of an electrode coated with a partially-dried graphene oxide, further wherein said creating of said pores in said graphene oxide is obtained by freeze- drying said assembly to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said adsorbing of said graphene oxide on said electrode surface is achieved by contacting said electrode surface with a graphene oxide- ammonium carbonate suspension, to obtain an assembly consisting of an electrode coated with said graphene oxide-ammonium carbonate suspension, further wherein said creating of said pores in said graphene oxide is obtained by heating said assembly to about 100 0 C for several minutes to obtain a porous graphene oxide film adsorbed on said electrode. Withdrawn
The process of claim 4, wherein said graphene oxide is a functionalized graphene oxide. Withdrawn
A capacitive vapor sensor prepared according to the process of claim 4. Previously presented
Layer stacks claimed or described, ordered top of device to substrate.
capacitive vapor sensor
capacitive vapor sensor with interdigitated electrodes
Materials described outside the worked examples.
porous graphene oxide
functionalized graphene oxide
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
Figure 1 A depicts a scheme of the capacitor and the morphology of the porous graphene oxide (p G₀) vapor sensor matrix of the present invention, showing the two electrodes and dielectric p G₀ medium between them (left); scanning electron microscopy (SEM) image of the electrode-grown p G₀ …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 10–15 sec | — |
Duration |
Related documents with shared materials, methods, properties, or citations.
(NH₄)2CO₃
phenyl-graphene oxide
dodecyl-graphene oxide
ethanol-graphene oxide
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
| — |
Duration | ≥ 5 minutes | — |
Duration | ≥ 1 hour | — |
(NH₄)2CO₃
phenyl-graphene oxide
dodecyl-graphene oxide
ethanol-graphene oxide
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
| — |
Duration | ≥ 5 minutes | — |
Duration | ≥ 1 hour | — |
(NH₄)2CO₃
phenyl-graphene oxide
dodecyl-graphene oxide
ethanol-graphene oxide
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
| — |
Duration | ≥ 5 minutes | — |
Duration | ≥ 1 hour | — |
(NH₄)2CO₃
phenyl-graphene oxide
dodecyl-graphene oxide
ethanol-graphene oxide
Figures 1 I C and I ID depict SEM images of porous graphene oxide sensors prepared according to the process of Example IB, in comparison to non-porous graphene oxide sensors (
| — |
Duration | ≥ 5 minutes | — |
Duration | ≥ 1 hour | — |