Patent
US 10,245,557METHOD OF MANUFACTURING NANOPOROUS GRAPHENE MEMBRANE
Young Min JHON
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 10,245,557Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 are molecular dynamics simulation results showing that when carbon atoms which are oxidized at the surface of graphene which is oxidized with high …
FIG. 2 is a schematic diagram showing that nanopores can be formed in multilayer graphene even when oxidation-reduction processes in which etching is …
FIG. 3 is a schematic diagram exemplarily illustrating a process (see the lower figure) in which a multilayer graphene nanoporous membrane is manufactured …
FIG. 4 is a schematic diagram showing that since the grain boundaries of the adjacent upper and lower layers in a multilayer graphene membrane are slightly …
FIGS. 5A and 5 B are a schematic diagram illustrating a seawater desalination process through a one-layer nanoporous graphene membrane, and a schematic diagram …
FIGS. 6A to 6D each show changes in the permeation amount of water of one-layer to four-layer nanoporous graphene membranes over time, respectively, which are …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of manufacturing a porous graphene membrane, comprising: a first step of oxidizing a surface of multilayer graphene, wherein the multilayer graphene is placed under an environment with oxygen-based radicals for oxidation of the surface of multilayer graphene, and the surface of multilayer graphene is oxidized in a randomly dispersed form by lowering an oxidation amount so as not to completely oxidize the entire surface; a second step of reducing the oxidized surface of the multilayer graphene to carry out reductive etching of oxidized carbon atoms in a randomly dispersed form; and a third step of repeatedly performing a series of the first and the second steps at least twice until nanopores having diameter of 0.4 to 100 nm are formed in the multilayer graphene, wherein the number of repetitions is adjusted until nanopores p enetrating the multilayer graphene are formed. Currently amended
The method of claim 1, wherein the multilayer graphene consists of 1 0 layers or less. Original
The method of claim 1, wherein the multilayer graphene has a polycrystalline form. Original
The method of claim 1, wherein, in the second step, multilayer graphene is heated by microwaves for reductive etching. Original
The method of claim 1, wherein, in the second step, laser irradiation is applied to the surface of multilayer graphene for reductive etching. Original
The method of claim 1, wherein, in the third step, the number of repetitions is adjusted to a time point at which the nanopores are formed in a first layer s of the multilayer graphene and the nano pores are not formed in a second layer s of the multilayer graphene. Currently amended
The method of claim 1, further comprising: a process of passivating a broken binding part of edge carbon atoms, which is formed by [[an]] the reductive etching of the second step, e if returning from the second step to the first step for a repeated process of the third step. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on only a surface multilayer graphene. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on both surfaces of multilayer graphene. Currently amended
1 7. The method of claim 1, further comprising: a step of clustering epoxy functional groups or hydroxyl functional groups formed by oxidation on a graphene surface through an annealing process between the first step and the second step. Original
1 8. The method of claim 1, wherein processes of the first step to the third step are carried out after preliminarily attaching the multilayer graphene on a perforated support. Original
1 9. The method of claim 1, further comprising: a step of removing oxidation-related chemical functional groups remaining on a graphene surface after finally obtaining a nanoporous multilayer graphene membrane. Original
4-5. Canceled
Canceled
The method of claim [[5]] 1, wherein the oxygen-based radical is at least any one selected from the group consisting of an O radical, an 02 radical, an Os radical (ozone), a OH radical, and a combination thereof. Currently amended
Canceled
The method of claim [[7]] 1, wherein the nano pores penetrating the multilayer graphene have an average diameter of less than 10 nm when viewed in a direction perpendicular to a graphene face. Currently amended
Layer stacks claimed or described, ordered top of device to substrate.
nanoporous multilayer graphene membrane
Materials described outside the worked examples.
multilayer graphene
oxygen-based radicals
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
nanopore diameter in multilayer graphene membrane | 0.4–100 nm | multilayer graphene |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,245,557Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 are molecular dynamics simulation results showing that when carbon atoms which are oxidized at the surface of graphene which is oxidized with high …
FIG. 2 is a schematic diagram showing that nanopores can be formed in multilayer graphene even when oxidation-reduction processes in which etching is …
FIG. 3 is a schematic diagram exemplarily illustrating a process (see the lower figure) in which a multilayer graphene nanoporous membrane is manufactured …
FIG. 4 is a schematic diagram showing that since the grain boundaries of the adjacent upper and lower layers in a multilayer graphene membrane are slightly …
FIGS. 5A and 5 B are a schematic diagram illustrating a seawater desalination process through a one-layer nanoporous graphene membrane, and a schematic diagram …
FIGS. 6A to 6D each show changes in the permeation amount of water of one-layer to four-layer nanoporous graphene membranes over time, respectively, which are …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of manufacturing a porous graphene membrane, comprising: a first step of oxidizing a surface of multilayer graphene, wherein the multilayer graphene is placed under an environment with oxygen-based radicals for oxidation of the surface of multilayer graphene, and the surface of multilayer graphene is oxidized in a randomly dispersed form by lowering an oxidation amount so as not to completely oxidize the entire surface; a second step of reducing the oxidized surface of the multilayer graphene to carry out reductive etching of oxidized carbon atoms in a randomly dispersed form; and a third step of repeatedly performing a series of the first and the second steps at least twice until nanopores having diameter of 0.4 to 100 nm are formed in the multilayer graphene, wherein the number of repetitions is adjusted until nanopores p enetrating the multilayer graphene are formed. Currently amended
The method of claim 1, wherein the multilayer graphene consists of 1 0 layers or less. Original
The method of claim 1, wherein the multilayer graphene has a polycrystalline form. Original
The method of claim 1, wherein, in the second step, multilayer graphene is heated by microwaves for reductive etching. Original
The method of claim 1, wherein, in the second step, laser irradiation is applied to the surface of multilayer graphene for reductive etching. Original
The method of claim 1, wherein, in the third step, the number of repetitions is adjusted to a time point at which the nanopores are formed in a first layer s of the multilayer graphene and the nano pores are not formed in a second layer s of the multilayer graphene. Currently amended
The method of claim 1, further comprising: a process of passivating a broken binding part of edge carbon atoms, which is formed by [[an]] the reductive etching of the second step, e if returning from the second step to the first step for a repeated process of the third step. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on only a surface multilayer graphene. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on both surfaces of multilayer graphene. Currently amended
1 7. The method of claim 1, further comprising: a step of clustering epoxy functional groups or hydroxyl functional groups formed by oxidation on a graphene surface through an annealing process between the first step and the second step. Original
1 8. The method of claim 1, wherein processes of the first step to the third step are carried out after preliminarily attaching the multilayer graphene on a perforated support. Original
1 9. The method of claim 1, further comprising: a step of removing oxidation-related chemical functional groups remaining on a graphene surface after finally obtaining a nanoporous multilayer graphene membrane. Original
4-5. Canceled
Canceled
The method of claim [[5]] 1, wherein the oxygen-based radical is at least any one selected from the group consisting of an O radical, an 02 radical, an Os radical (ozone), a OH radical, and a combination thereof. Currently amended
Canceled
The method of claim [[7]] 1, wherein the nano pores penetrating the multilayer graphene have an average diameter of less than 10 nm when viewed in a direction perpendicular to a graphene face. Currently amended
Layer stacks claimed or described, ordered top of device to substrate.
nanoporous multilayer graphene membrane
Materials described outside the worked examples.
multilayer graphene
oxygen-based radicals
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
nanopore diameter in multilayer graphene membrane | 0.4–100 nm | multilayer graphene |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,245,557Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 are molecular dynamics simulation results showing that when carbon atoms which are oxidized at the surface of graphene which is oxidized with high …
FIG. 2 is a schematic diagram showing that nanopores can be formed in multilayer graphene even when oxidation-reduction processes in which etching is …
FIG. 3 is a schematic diagram exemplarily illustrating a process (see the lower figure) in which a multilayer graphene nanoporous membrane is manufactured …
FIG. 4 is a schematic diagram showing that since the grain boundaries of the adjacent upper and lower layers in a multilayer graphene membrane are slightly …
FIGS. 5A and 5 B are a schematic diagram illustrating a seawater desalination process through a one-layer nanoporous graphene membrane, and a schematic diagram …
FIGS. 6A to 6D each show changes in the permeation amount of water of one-layer to four-layer nanoporous graphene membranes over time, respectively, which are …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of manufacturing a porous graphene membrane, comprising: a first step of oxidizing a surface of multilayer graphene, wherein the multilayer graphene is placed under an environment with oxygen-based radicals for oxidation of the surface of multilayer graphene, and the surface of multilayer graphene is oxidized in a randomly dispersed form by lowering an oxidation amount so as not to completely oxidize the entire surface; a second step of reducing the oxidized surface of the multilayer graphene to carry out reductive etching of oxidized carbon atoms in a randomly dispersed form; and a third step of repeatedly performing a series of the first and the second steps at least twice until nanopores having diameter of 0.4 to 100 nm are formed in the multilayer graphene, wherein the number of repetitions is adjusted until nanopores p enetrating the multilayer graphene are formed. Currently amended
The method of claim 1, wherein the multilayer graphene consists of 1 0 layers or less. Original
The method of claim 1, wherein the multilayer graphene has a polycrystalline form. Original
The method of claim 1, wherein, in the second step, multilayer graphene is heated by microwaves for reductive etching. Original
The method of claim 1, wherein, in the second step, laser irradiation is applied to the surface of multilayer graphene for reductive etching. Original
The method of claim 1, wherein, in the third step, the number of repetitions is adjusted to a time point at which the nanopores are formed in a first layer s of the multilayer graphene and the nano pores are not formed in a second layer s of the multilayer graphene. Currently amended
The method of claim 1, further comprising: a process of passivating a broken binding part of edge carbon atoms, which is formed by [[an]] the reductive etching of the second step, e if returning from the second step to the first step for a repeated process of the third step. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on only a surface multilayer graphene. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on both surfaces of multilayer graphene. Currently amended
1 7. The method of claim 1, further comprising: a step of clustering epoxy functional groups or hydroxyl functional groups formed by oxidation on a graphene surface through an annealing process between the first step and the second step. Original
1 8. The method of claim 1, wherein processes of the first step to the third step are carried out after preliminarily attaching the multilayer graphene on a perforated support. Original
1 9. The method of claim 1, further comprising: a step of removing oxidation-related chemical functional groups remaining on a graphene surface after finally obtaining a nanoporous multilayer graphene membrane. Original
4-5. Canceled
Canceled
The method of claim [[5]] 1, wherein the oxygen-based radical is at least any one selected from the group consisting of an O radical, an 02 radical, an Os radical (ozone), a OH radical, and a combination thereof. Currently amended
Canceled
The method of claim [[7]] 1, wherein the nano pores penetrating the multilayer graphene have an average diameter of less than 10 nm when viewed in a direction perpendicular to a graphene face. Currently amended
Layer stacks claimed or described, ordered top of device to substrate.
nanoporous multilayer graphene membrane
Materials described outside the worked examples.
multilayer graphene
oxygen-based radicals
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
nanopore diameter in multilayer graphene membrane | 0.4–100 nm | multilayer graphene |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,245,557Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 are molecular dynamics simulation results showing that when carbon atoms which are oxidized at the surface of graphene which is oxidized with high …
FIG. 2 is a schematic diagram showing that nanopores can be formed in multilayer graphene even when oxidation-reduction processes in which etching is …
FIG. 3 is a schematic diagram exemplarily illustrating a process (see the lower figure) in which a multilayer graphene nanoporous membrane is manufactured …
FIG. 4 is a schematic diagram showing that since the grain boundaries of the adjacent upper and lower layers in a multilayer graphene membrane are slightly …
FIGS. 5A and 5 B are a schematic diagram illustrating a seawater desalination process through a one-layer nanoporous graphene membrane, and a schematic diagram …
FIGS. 6A to 6D each show changes in the permeation amount of water of one-layer to four-layer nanoporous graphene membranes over time, respectively, which are …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of manufacturing a porous graphene membrane, comprising: a first step of oxidizing a surface of multilayer graphene, wherein the multilayer graphene is placed under an environment with oxygen-based radicals for oxidation of the surface of multilayer graphene, and the surface of multilayer graphene is oxidized in a randomly dispersed form by lowering an oxidation amount so as not to completely oxidize the entire surface; a second step of reducing the oxidized surface of the multilayer graphene to carry out reductive etching of oxidized carbon atoms in a randomly dispersed form; and a third step of repeatedly performing a series of the first and the second steps at least twice until nanopores having diameter of 0.4 to 100 nm are formed in the multilayer graphene, wherein the number of repetitions is adjusted until nanopores p enetrating the multilayer graphene are formed. Currently amended
The method of claim 1, wherein the multilayer graphene consists of 1 0 layers or less. Original
The method of claim 1, wherein the multilayer graphene has a polycrystalline form. Original
The method of claim 1, wherein, in the second step, multilayer graphene is heated by microwaves for reductive etching. Original
The method of claim 1, wherein, in the second step, laser irradiation is applied to the surface of multilayer graphene for reductive etching. Original
The method of claim 1, wherein, in the third step, the number of repetitions is adjusted to a time point at which the nanopores are formed in a first layer s of the multilayer graphene and the nano pores are not formed in a second layer s of the multilayer graphene. Currently amended
The method of claim 1, further comprising: a process of passivating a broken binding part of edge carbon atoms, which is formed by [[an]] the reductive etching of the second step, e if returning from the second step to the first step for a repeated process of the third step. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on only a surface multilayer graphene. Currently amended
The method of claim 1, wherein, in the first and second steps, oxidative and reductive etching processes are carried out on both surfaces of multilayer graphene. Currently amended
1 7. The method of claim 1, further comprising: a step of clustering epoxy functional groups or hydroxyl functional groups formed by oxidation on a graphene surface through an annealing process between the first step and the second step. Original
1 8. The method of claim 1, wherein processes of the first step to the third step are carried out after preliminarily attaching the multilayer graphene on a perforated support. Original
1 9. The method of claim 1, further comprising: a step of removing oxidation-related chemical functional groups remaining on a graphene surface after finally obtaining a nanoporous multilayer graphene membrane. Original
4-5. Canceled
Canceled
The method of claim [[5]] 1, wherein the oxygen-based radical is at least any one selected from the group consisting of an O radical, an 02 radical, an Os radical (ozone), a OH radical, and a combination thereof. Currently amended
Canceled
The method of claim [[7]] 1, wherein the nano pores penetrating the multilayer graphene have an average diameter of less than 10 nm when viewed in a direction perpendicular to a graphene face. Currently amended
Layer stacks claimed or described, ordered top of device to substrate.
nanoporous multilayer graphene membrane
Materials described outside the worked examples.
multilayer graphene
oxygen-based radicals
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
nanopore diameter in multilayer graphene membrane | 0.4–100 nm | multilayer graphene |
Related documents with shared materials, methods, properties, or citations.
average nanopore diameter (preferred embodiment) |
| ≤ 10 nm |
multilayer graphene |
multilayer graphene layer count | ≤10 layers | multilayer graphene |
average particle size of polycrystalline multilayer graphene for microwave heating | ≥ 0.5 mm | multilayer graphene |
Duration | 1–3 minutes | — |
Duration | 40–180 seconds | — |
Thickness | ≥ 0.5 mm | — |
Thickness | 0.4–100 nm | — |
Thickness | ≤ 10 nm | — |
average nanopore diameter (preferred embodiment) |
| ≤ 10 nm |
multilayer graphene |
multilayer graphene layer count | ≤10 layers | multilayer graphene |
average particle size of polycrystalline multilayer graphene for microwave heating | ≥ 0.5 mm | multilayer graphene |
Duration | 1–3 minutes | — |
Duration | 40–180 seconds | — |
Thickness | ≥ 0.5 mm | — |
Thickness | 0.4–100 nm | — |
Thickness | ≤ 10 nm | — |
average nanopore diameter (preferred embodiment) |
| ≤ 10 nm |
multilayer graphene |
multilayer graphene layer count | ≤10 layers | multilayer graphene |
average particle size of polycrystalline multilayer graphene for microwave heating | ≥ 0.5 mm | multilayer graphene |
Duration | 1–3 minutes | — |
Duration | 40–180 seconds | — |
Thickness | ≥ 0.5 mm | — |
Thickness | 0.4–100 nm | — |
Thickness | ≤ 10 nm | — |
average nanopore diameter (preferred embodiment) |
| ≤ 10 nm |
multilayer graphene |
multilayer graphene layer count | ≤10 layers | multilayer graphene |
average particle size of polycrystalline multilayer graphene for microwave heating | ≥ 0.5 mm | multilayer graphene |
Duration | 1–3 minutes | — |
Duration | 40–180 seconds | — |
Thickness | ≥ 0.5 mm | — |
Thickness | 0.4–100 nm | — |
Thickness | ≤ 10 nm | — |