Patent
US 11,230,681SUPERLUBRICATING GRAPHENE AND GRAPHENE OXIDE FILMS
Anirudha V. Sumant
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 11,230,681Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A if the gas environment 140 includes air, there is loss of superlubricity. Figure 2B illustrates the first direct evidence that has achieved …
FIG. 2 B; [0012] Figure 3A illustrates a plot of a pin-on-disc friction coefficient measurements performed on a graphene film grown on a Ni thin film sample and
FIG. 3A where the lowest coefficient of friction (COF) has a value of 0.003; [0013] Figure 4A illustrates a pin on disc friction coefficient test carried out with …
FIG. 4C illustrates high wear debris on a graphene coated ball running against a DLC flat;
FIG. 5B micrograph of graphene ball surface); [0015] Figure 6A shows a micrograph of wear on a DLC ball with
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
FIG. 7 shows results of two of such tests taken on SPG coated Ni and SiO 2 coated Ni surfaces against the DLC coating 120 showing COFs of 0.03 and 0.005, …
FIG. 8C, the friction coefficient dropped to 0.03, after the SS surface 165 is spread with graphene flakes. The wear observed on the DLC ball 130 after the …
FIGS. 9A and 9B illustrate the coefficients of friction for all four cases. The coefficient of friction for bare steel interfaces is initially low but increases …
FIG. 10A) and line profile measurements indicate formation of graphene protection layer (as confirmed by Raman spectroscopy not shown here). However, due to the …
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 forming at least one of graphene and graphene oxide on a substrate, comprising the steps o f: providing a solution processed material selected from the group of solution processed graphene and solution processed graphene oxide; and disposing the solution processed material on the substrate, thereby establishing a low friction wear surface.
The method as defined in Claim 1 wherein the solution processed material is formed by at least one of (a) a chemical exfoliation step, (b) mechanical exfoliation, (c) CVD of the at least one of graphene and graphene oxide and disposing the at least one of graphene and graphene oxide into a liquid.
The method as defined in Claim 1 wherein the substrate is selected from the group of a metal, a transition metal and an insulator.
The method as defined in Claim 1 further including the step of providing an opposing wear member against which slides the at least one of graphene and graphene oxide on the substrate.
The method as defined in Claim 1 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
The solution processed wear member as defined in Claim 1 wherein the graphene form of the wear member has a coefficient of friction of about 0.003-0.005 in selected atmospheres and the graphene oxide has a coefficient of friction of about 0.15-1.0 in selected atmospheres. What is claimed is:
A solution processed wear member article of manufacture, comprising: a first substrate; a solution of at least one of (a) graphene and a liquid and (b) graphene oxide and a liquid, thereby forming a solution processed material disposed on the first substrate; and a second substrate forming an opposing wear member of the solution processed material disposed on the first substrate.
The solution processed wear member as defined in Claim 14 wherein the first substrate is selected from the group of a steel, a transition metal and an insulator.
The solution processed wear member as defined in Claim 14 wherein the liquid comprises at least one of water, alcohol or hydrocarbon based solvent.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises a metal.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises DLC on an underlying substrate.
The solution processed wear member as defined in Claim 14 further including an atmosphere surrounding the solution processed wear member consisting of at least one of ambient, N 2, Ar and a high vacuum.
The solution processed wear member as defined in Claim 14 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
A method of interacting with reduced friction comprising: providing relative movement between a first surface having disposed thereon graphene oxide flakes and being substantially free of oil with a second surface having a diamond like coating; and interacting the first surface with the second surface wherein the coefficient of friction is between 0.15 and 1.0. Previously presented
The method of claim 24, further wherein the relative movement including an atmosphere surrounding a solution processed wear member consisting of at least one of ambient, N2, Ar and a high vacuum. Previously presented
The method of claim 24, wherein a substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing, the substrate comprises the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a film on the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a layer of graphene oxide flakes on the first surface. Previously presented
A method of forming graphene oxide on a substrate, comprising the steps of: disposing graphene oxide on the substrate substantially free of oil, thereby establishing a low friction wear surface; providing an opposing wear member comprising diamond like coating (DLC); and positioning the low friction wear surface and the opposing wear member in water wherein the opposing wear member slides against the graphene oxide on the substrate. Currently amended
The method of claim 29, wherein disposing graphene oxide comprises forming a layer of graphene oxide flakes. Previously presented
The method as defined in claim 29, wherein disposing the graphene oxide comprises spraying a liquid containing graphene oxide onto the substrate. Previously presented
The method of claim 29, wherein disposing oxide film. Previously presented
The method as defined in claim 29, wherein metal, a transition metal and an insulator. Previously
Canceled
Canceled
The method of claim [[37]] 29, wherein the presented
Canceled
Canceled
Canceled
Canceled graphene oxide comprises forming a graphene the graphene oxide film is formed by chemical the substrate is selected from the group of a presented DLC is a hydrogenated form of DLC. Previously the opposing wear member is pre-processed to
Layer stacks claimed or described, ordered top of device to substrate.
solution processed graphene/graphene oxide wear system
graphene oxide/DLC tribological system
Materials described outside the worked examples.
graphene
graphene oxide
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene COF in selected atmospheres (claimed range) | 0.003–0.005 dimensionless | graphene |
graphene oxide COF in selected atmospheres (claimed range) | 0.15–1 dimensionless |
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Patent
Atlas literature
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US 11,230,681Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A if the gas environment 140 includes air, there is loss of superlubricity. Figure 2B illustrates the first direct evidence that has achieved …
FIG. 2 B; [0012] Figure 3A illustrates a plot of a pin-on-disc friction coefficient measurements performed on a graphene film grown on a Ni thin film sample and
FIG. 3A where the lowest coefficient of friction (COF) has a value of 0.003; [0013] Figure 4A illustrates a pin on disc friction coefficient test carried out with …
FIG. 4C illustrates high wear debris on a graphene coated ball running against a DLC flat;
FIG. 5B micrograph of graphene ball surface); [0015] Figure 6A shows a micrograph of wear on a DLC ball with
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
FIG. 7 shows results of two of such tests taken on SPG coated Ni and SiO 2 coated Ni surfaces against the DLC coating 120 showing COFs of 0.03 and 0.005, …
FIG. 8C, the friction coefficient dropped to 0.03, after the SS surface 165 is spread with graphene flakes. The wear observed on the DLC ball 130 after the …
FIGS. 9A and 9B illustrate the coefficients of friction for all four cases. The coefficient of friction for bare steel interfaces is initially low but increases …
FIG. 10A) and line profile measurements indicate formation of graphene protection layer (as confirmed by Raman spectroscopy not shown here). However, due to the …
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 forming at least one of graphene and graphene oxide on a substrate, comprising the steps o f: providing a solution processed material selected from the group of solution processed graphene and solution processed graphene oxide; and disposing the solution processed material on the substrate, thereby establishing a low friction wear surface.
The method as defined in Claim 1 wherein the solution processed material is formed by at least one of (a) a chemical exfoliation step, (b) mechanical exfoliation, (c) CVD of the at least one of graphene and graphene oxide and disposing the at least one of graphene and graphene oxide into a liquid.
The method as defined in Claim 1 wherein the substrate is selected from the group of a metal, a transition metal and an insulator.
The method as defined in Claim 1 further including the step of providing an opposing wear member against which slides the at least one of graphene and graphene oxide on the substrate.
The method as defined in Claim 1 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
The solution processed wear member as defined in Claim 1 wherein the graphene form of the wear member has a coefficient of friction of about 0.003-0.005 in selected atmospheres and the graphene oxide has a coefficient of friction of about 0.15-1.0 in selected atmospheres. What is claimed is:
A solution processed wear member article of manufacture, comprising: a first substrate; a solution of at least one of (a) graphene and a liquid and (b) graphene oxide and a liquid, thereby forming a solution processed material disposed on the first substrate; and a second substrate forming an opposing wear member of the solution processed material disposed on the first substrate.
The solution processed wear member as defined in Claim 14 wherein the first substrate is selected from the group of a steel, a transition metal and an insulator.
The solution processed wear member as defined in Claim 14 wherein the liquid comprises at least one of water, alcohol or hydrocarbon based solvent.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises a metal.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises DLC on an underlying substrate.
The solution processed wear member as defined in Claim 14 further including an atmosphere surrounding the solution processed wear member consisting of at least one of ambient, N 2, Ar and a high vacuum.
The solution processed wear member as defined in Claim 14 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
A method of interacting with reduced friction comprising: providing relative movement between a first surface having disposed thereon graphene oxide flakes and being substantially free of oil with a second surface having a diamond like coating; and interacting the first surface with the second surface wherein the coefficient of friction is between 0.15 and 1.0. Previously presented
The method of claim 24, further wherein the relative movement including an atmosphere surrounding a solution processed wear member consisting of at least one of ambient, N2, Ar and a high vacuum. Previously presented
The method of claim 24, wherein a substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing, the substrate comprises the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a film on the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a layer of graphene oxide flakes on the first surface. Previously presented
A method of forming graphene oxide on a substrate, comprising the steps of: disposing graphene oxide on the substrate substantially free of oil, thereby establishing a low friction wear surface; providing an opposing wear member comprising diamond like coating (DLC); and positioning the low friction wear surface and the opposing wear member in water wherein the opposing wear member slides against the graphene oxide on the substrate. Currently amended
The method of claim 29, wherein disposing graphene oxide comprises forming a layer of graphene oxide flakes. Previously presented
The method as defined in claim 29, wherein disposing the graphene oxide comprises spraying a liquid containing graphene oxide onto the substrate. Previously presented
The method of claim 29, wherein disposing oxide film. Previously presented
The method as defined in claim 29, wherein metal, a transition metal and an insulator. Previously
Canceled
Canceled
The method of claim [[37]] 29, wherein the presented
Canceled
Canceled
Canceled
Canceled graphene oxide comprises forming a graphene the graphene oxide film is formed by chemical the substrate is selected from the group of a presented DLC is a hydrogenated form of DLC. Previously the opposing wear member is pre-processed to
Layer stacks claimed or described, ordered top of device to substrate.
solution processed graphene/graphene oxide wear system
graphene oxide/DLC tribological system
Materials described outside the worked examples.
graphene
graphene oxide
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene COF in selected atmospheres (claimed range) | 0.003–0.005 dimensionless | graphene |
graphene oxide COF in selected atmospheres (claimed range) | 0.15–1 dimensionless |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,230,681Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A if the gas environment 140 includes air, there is loss of superlubricity. Figure 2B illustrates the first direct evidence that has achieved …
FIG. 2 B; [0012] Figure 3A illustrates a plot of a pin-on-disc friction coefficient measurements performed on a graphene film grown on a Ni thin film sample and
FIG. 3A where the lowest coefficient of friction (COF) has a value of 0.003; [0013] Figure 4A illustrates a pin on disc friction coefficient test carried out with …
FIG. 4C illustrates high wear debris on a graphene coated ball running against a DLC flat;
FIG. 5B micrograph of graphene ball surface); [0015] Figure 6A shows a micrograph of wear on a DLC ball with
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
FIG. 7 shows results of two of such tests taken on SPG coated Ni and SiO 2 coated Ni surfaces against the DLC coating 120 showing COFs of 0.03 and 0.005, …
FIG. 8C, the friction coefficient dropped to 0.03, after the SS surface 165 is spread with graphene flakes. The wear observed on the DLC ball 130 after the …
FIGS. 9A and 9B illustrate the coefficients of friction for all four cases. The coefficient of friction for bare steel interfaces is initially low but increases …
FIG. 10A) and line profile measurements indicate formation of graphene protection layer (as confirmed by Raman spectroscopy not shown here). However, due to the …
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 forming at least one of graphene and graphene oxide on a substrate, comprising the steps o f: providing a solution processed material selected from the group of solution processed graphene and solution processed graphene oxide; and disposing the solution processed material on the substrate, thereby establishing a low friction wear surface.
The method as defined in Claim 1 wherein the solution processed material is formed by at least one of (a) a chemical exfoliation step, (b) mechanical exfoliation, (c) CVD of the at least one of graphene and graphene oxide and disposing the at least one of graphene and graphene oxide into a liquid.
The method as defined in Claim 1 wherein the substrate is selected from the group of a metal, a transition metal and an insulator.
The method as defined in Claim 1 further including the step of providing an opposing wear member against which slides the at least one of graphene and graphene oxide on the substrate.
The method as defined in Claim 1 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
The solution processed wear member as defined in Claim 1 wherein the graphene form of the wear member has a coefficient of friction of about 0.003-0.005 in selected atmospheres and the graphene oxide has a coefficient of friction of about 0.15-1.0 in selected atmospheres. What is claimed is:
A solution processed wear member article of manufacture, comprising: a first substrate; a solution of at least one of (a) graphene and a liquid and (b) graphene oxide and a liquid, thereby forming a solution processed material disposed on the first substrate; and a second substrate forming an opposing wear member of the solution processed material disposed on the first substrate.
The solution processed wear member as defined in Claim 14 wherein the first substrate is selected from the group of a steel, a transition metal and an insulator.
The solution processed wear member as defined in Claim 14 wherein the liquid comprises at least one of water, alcohol or hydrocarbon based solvent.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises a metal.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises DLC on an underlying substrate.
The solution processed wear member as defined in Claim 14 further including an atmosphere surrounding the solution processed wear member consisting of at least one of ambient, N 2, Ar and a high vacuum.
The solution processed wear member as defined in Claim 14 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
A method of interacting with reduced friction comprising: providing relative movement between a first surface having disposed thereon graphene oxide flakes and being substantially free of oil with a second surface having a diamond like coating; and interacting the first surface with the second surface wherein the coefficient of friction is between 0.15 and 1.0. Previously presented
The method of claim 24, further wherein the relative movement including an atmosphere surrounding a solution processed wear member consisting of at least one of ambient, N2, Ar and a high vacuum. Previously presented
The method of claim 24, wherein a substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing, the substrate comprises the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a film on the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a layer of graphene oxide flakes on the first surface. Previously presented
A method of forming graphene oxide on a substrate, comprising the steps of: disposing graphene oxide on the substrate substantially free of oil, thereby establishing a low friction wear surface; providing an opposing wear member comprising diamond like coating (DLC); and positioning the low friction wear surface and the opposing wear member in water wherein the opposing wear member slides against the graphene oxide on the substrate. Currently amended
The method of claim 29, wherein disposing graphene oxide comprises forming a layer of graphene oxide flakes. Previously presented
The method as defined in claim 29, wherein disposing the graphene oxide comprises spraying a liquid containing graphene oxide onto the substrate. Previously presented
The method of claim 29, wherein disposing oxide film. Previously presented
The method as defined in claim 29, wherein metal, a transition metal and an insulator. Previously
Canceled
Canceled
The method of claim [[37]] 29, wherein the presented
Canceled
Canceled
Canceled
Canceled graphene oxide comprises forming a graphene the graphene oxide film is formed by chemical the substrate is selected from the group of a presented DLC is a hydrogenated form of DLC. Previously the opposing wear member is pre-processed to
Layer stacks claimed or described, ordered top of device to substrate.
solution processed graphene/graphene oxide wear system
graphene oxide/DLC tribological system
Materials described outside the worked examples.
graphene
graphene oxide
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene COF in selected atmospheres (claimed range) | 0.003–0.005 dimensionless | graphene |
graphene oxide COF in selected atmospheres (claimed range) | 0.15–1 dimensionless |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,230,681Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A if the gas environment 140 includes air, there is loss of superlubricity. Figure 2B illustrates the first direct evidence that has achieved …
FIG. 2 B; [0012] Figure 3A illustrates a plot of a pin-on-disc friction coefficient measurements performed on a graphene film grown on a Ni thin film sample and
FIG. 3A where the lowest coefficient of friction (COF) has a value of 0.003; [0013] Figure 4A illustrates a pin on disc friction coefficient test carried out with …
FIG. 4C illustrates high wear debris on a graphene coated ball running against a DLC flat;
FIG. 5B micrograph of graphene ball surface); [0015] Figure 6A shows a micrograph of wear on a DLC ball with
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
FIG. 7 shows results of two of such tests taken on SPG coated Ni and SiO 2 coated Ni surfaces against the DLC coating 120 showing COFs of 0.03 and 0.005, …
FIG. 8C, the friction coefficient dropped to 0.03, after the SS surface 165 is spread with graphene flakes. The wear observed on the DLC ball 130 after the …
FIGS. 9A and 9B illustrate the coefficients of friction for all four cases. The coefficient of friction for bare steel interfaces is initially low but increases …
FIG. 10A) and line profile measurements indicate formation of graphene protection layer (as confirmed by Raman spectroscopy not shown here). However, due to the …
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 forming at least one of graphene and graphene oxide on a substrate, comprising the steps o f: providing a solution processed material selected from the group of solution processed graphene and solution processed graphene oxide; and disposing the solution processed material on the substrate, thereby establishing a low friction wear surface.
The method as defined in Claim 1 wherein the solution processed material is formed by at least one of (a) a chemical exfoliation step, (b) mechanical exfoliation, (c) CVD of the at least one of graphene and graphene oxide and disposing the at least one of graphene and graphene oxide into a liquid.
The method as defined in Claim 1 wherein the substrate is selected from the group of a metal, a transition metal and an insulator.
The method as defined in Claim 1 further including the step of providing an opposing wear member against which slides the at least one of graphene and graphene oxide on the substrate.
The method as defined in Claim 1 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
The solution processed wear member as defined in Claim 1 wherein the graphene form of the wear member has a coefficient of friction of about 0.003-0.005 in selected atmospheres and the graphene oxide has a coefficient of friction of about 0.15-1.0 in selected atmospheres. What is claimed is:
A solution processed wear member article of manufacture, comprising: a first substrate; a solution of at least one of (a) graphene and a liquid and (b) graphene oxide and a liquid, thereby forming a solution processed material disposed on the first substrate; and a second substrate forming an opposing wear member of the solution processed material disposed on the first substrate.
The solution processed wear member as defined in Claim 14 wherein the first substrate is selected from the group of a steel, a transition metal and an insulator.
The solution processed wear member as defined in Claim 14 wherein the liquid comprises at least one of water, alcohol or hydrocarbon based solvent.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises a metal.
The solution processed wear member as defined in Claim 14 wherein the second substrate comprises DLC on an underlying substrate.
The solution processed wear member as defined in Claim 14 further including an atmosphere surrounding the solution processed wear member consisting of at least one of ambient, N 2, Ar and a high vacuum.
The solution processed wear member as defined in Claim 14 wherein the substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing.
A method of interacting with reduced friction comprising: providing relative movement between a first surface having disposed thereon graphene oxide flakes and being substantially free of oil with a second surface having a diamond like coating; and interacting the first surface with the second surface wherein the coefficient of friction is between 0.15 and 1.0. Previously presented
The method of claim 24, further wherein the relative movement including an atmosphere surrounding a solution processed wear member consisting of at least one of ambient, N2, Ar and a high vacuum. Previously presented
The method of claim 24, wherein a substrate is selected from the group of a plastic injection mold surface, a gun barrel, a cutting blade and a bearing, the substrate comprises the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a film on the first surface. Previously presented
The method of claim 24, wherein the graphene oxide is a layer of graphene oxide flakes on the first surface. Previously presented
A method of forming graphene oxide on a substrate, comprising the steps of: disposing graphene oxide on the substrate substantially free of oil, thereby establishing a low friction wear surface; providing an opposing wear member comprising diamond like coating (DLC); and positioning the low friction wear surface and the opposing wear member in water wherein the opposing wear member slides against the graphene oxide on the substrate. Currently amended
The method of claim 29, wherein disposing graphene oxide comprises forming a layer of graphene oxide flakes. Previously presented
The method as defined in claim 29, wherein disposing the graphene oxide comprises spraying a liquid containing graphene oxide onto the substrate. Previously presented
The method of claim 29, wherein disposing oxide film. Previously presented
The method as defined in claim 29, wherein metal, a transition metal and an insulator. Previously
Canceled
Canceled
The method of claim [[37]] 29, wherein the presented
Canceled
Canceled
Canceled
Canceled graphene oxide comprises forming a graphene the graphene oxide film is formed by chemical the substrate is selected from the group of a presented DLC is a hydrogenated form of DLC. Previously the opposing wear member is pre-processed to
Layer stacks claimed or described, ordered top of device to substrate.
solution processed graphene/graphene oxide wear system
graphene oxide/DLC tribological system
Materials described outside the worked examples.
graphene
graphene oxide
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6F for the Raman shift measured inside the wear track; [0016] Figure 7 shows superlubric behavior of Ni and SiO 2 surfaces after coating with a solution …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene COF in selected atmospheres (claimed range) | 0.003–0.005 dimensionless | graphene |
graphene oxide COF in selected atmospheres (claimed range) | 0.15–1 dimensionless |
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FIG. 10A) and line profile measurements indicate formation of graphene protection layer (as confirmed by Raman spectroscopy not shown here). However, due to the …
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graphene COF vs DLC in dry N2 (superlubricity regime) | 0.003 dimensionless | multi-layer graphene film on Ni substrate |
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graphene COF vs DLC in dry N2 (superlubricity regime) | 0.003 dimensionless | multi-layer graphene film on Ni substrate |
Thickness | 20–20 nm | — |
Duration | 6–7 minutes | — |
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copper
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FIG. 10A) and line profile measurements indicate formation of graphene protection layer (as confirmed by Raman spectroscopy not shown here). However, due to the …
graphene COF vs DLC in dry N2 (superlubricity regime) | 0.003 dimensionless | multi-layer graphene film on Ni substrate |
Thickness | 20–20 nm | — |
Duration | 6–7 minutes | — |