Patent
US 9,926,202GRAPHENE QUANTUM DOTS, THEIR COMPOSITES AND PREPARATION OF THE SAME
RAMAPRABHU SUNDARA
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,926,202Patent drawings and their descriptions. Click a drawing to enlarge it.
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 making zero dimensional graphene quantum dots (0- D GQDs), the method comprising: placing graphite oxide (GO) in a furnace, wherein the graphite oxide is surface passivated by polyethylene glycol under sonication to form a functionalized graphite oxide (f-GO PEG); flushing the furnace with an inert gas at a temperature of about 20 ° C to about 30 ° C for about 15 minutes; introducing hydrogen (H 2) into the furnace at a temperature of about 1 8° C to about 33 °C; heating the functionalized graphite oxide at about 200 ° C in the presence of hydrogen (H 2); and cooling the furnace to room temperature. Previously presented
The method of Claim 1, wherein the inert gas is argon (Ar). Original
The method of Claim 1, further comprising dispersing the 0-D GQDs in water and dialyzing to separate pure 0-D GQDs from unreacted GO. Original
The method of Claim 1, wherein the heating at 200 ° C is performed for at least 30 minutes. Original
The method of Claim 1, wherein the 0-D GQDs are water soluble. Original
The method of Claim 1, wherein the 0-D GQDs emit blue light upon exposure to UV light. Original
The method of Claim 1, wherein the 0 -D GQDs are biocompatible. Original
The method of Claim 1, wherein the graphite oxide used to make the zero dimensional graphene quantum dots (0 -D GQDs) is dried in a heated vacuum oven prior to practicing the method of Claim 1. Original
3-4. Canceled
Canceled
7-9. Canceled
Canceled
Canceled
16-42. Canceled
Canceled
A method of making a composite of zero dimensional graphene Quantum Dots (0 -D GQD) and one dimensional carbon nanotubes (1-D CNT), the method comprising: placing a mixture of graphite oxide (GO) and MnNi 3 in a furnace; flushing the furnace with an inert gas; introducing hydrogen (H 2) into the furnace; heating the mixture to about 200 ° C in the presence of hydrogen for about 5 minutes; heating the mixture to about 700 °C; introducing acetylene to the furnace; and cooling the furnace to room temperature. Previously presented
The method of Claim 43, wherein the inert gas is argon (Ar). Original
The method of Claim 43, wherein flushing the furnace with argon is for about 15 minutes. Original
The method of Claim 43, wherein flushing the furnace with an inert gas is performed at about a temperature of 20 ° C-30 °C. Original
The method of Claim 43, wherein the mixture is heated with acetylene for about 20 minutes. Previously presented
The method of Claim 43, wherein the method also produces two- dimensional graphene sheets. Previously presented
The method of Claim 43, further comprising dispersing the O-D GQDs in water and dialyzing to isolate 0-D GQDs. Original
The method of Claim 43, wherein the dried graphite oxide (GO) and MnNi 3 are ground. Previously presented
The method of Claim 43, wherein the graphite oxide is functionalized graphite oxide (f-GO). Original
The method of Claim 43, wherein the 0-D Original
The method of Claim 43, wherein the 0-D
The method of Claim 43, wherein the dried oven prior to practicing the method of Claim 43.
The method of Claim [[51]] 52 wherein the [[is]] surface passivated functionalized graphite oxide (f-GO PEG) is manufactured under sonication. Currently amended
60-68. Canceled
Canceled GQDs emit blue light upon exposure to UV light. GQDs are biocompatible. Original GQDs are biocompatible. Original graphite oxide (GO) is dried in a heated vacuum Previously presented vacuum oven is held at 50 °C. Original
Materials described outside the worked examples.
zero dimensional graphene quantum dots
graphite oxide
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 2.2 nm | zero dimensional graphene quantum dots |
Duration |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,926,202Patent drawings and their descriptions. Click a drawing to enlarge it.
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 making zero dimensional graphene quantum dots (0- D GQDs), the method comprising: placing graphite oxide (GO) in a furnace, wherein the graphite oxide is surface passivated by polyethylene glycol under sonication to form a functionalized graphite oxide (f-GO PEG); flushing the furnace with an inert gas at a temperature of about 20 ° C to about 30 ° C for about 15 minutes; introducing hydrogen (H 2) into the furnace at a temperature of about 1 8° C to about 33 °C; heating the functionalized graphite oxide at about 200 ° C in the presence of hydrogen (H 2); and cooling the furnace to room temperature. Previously presented
The method of Claim 1, wherein the inert gas is argon (Ar). Original
The method of Claim 1, further comprising dispersing the 0-D GQDs in water and dialyzing to separate pure 0-D GQDs from unreacted GO. Original
The method of Claim 1, wherein the heating at 200 ° C is performed for at least 30 minutes. Original
The method of Claim 1, wherein the 0-D GQDs are water soluble. Original
The method of Claim 1, wherein the 0-D GQDs emit blue light upon exposure to UV light. Original
The method of Claim 1, wherein the 0 -D GQDs are biocompatible. Original
The method of Claim 1, wherein the graphite oxide used to make the zero dimensional graphene quantum dots (0 -D GQDs) is dried in a heated vacuum oven prior to practicing the method of Claim 1. Original
3-4. Canceled
Canceled
7-9. Canceled
Canceled
Canceled
16-42. Canceled
Canceled
A method of making a composite of zero dimensional graphene Quantum Dots (0 -D GQD) and one dimensional carbon nanotubes (1-D CNT), the method comprising: placing a mixture of graphite oxide (GO) and MnNi 3 in a furnace; flushing the furnace with an inert gas; introducing hydrogen (H 2) into the furnace; heating the mixture to about 200 ° C in the presence of hydrogen for about 5 minutes; heating the mixture to about 700 °C; introducing acetylene to the furnace; and cooling the furnace to room temperature. Previously presented
The method of Claim 43, wherein the inert gas is argon (Ar). Original
The method of Claim 43, wherein flushing the furnace with argon is for about 15 minutes. Original
The method of Claim 43, wherein flushing the furnace with an inert gas is performed at about a temperature of 20 ° C-30 °C. Original
The method of Claim 43, wherein the mixture is heated with acetylene for about 20 minutes. Previously presented
The method of Claim 43, wherein the method also produces two- dimensional graphene sheets. Previously presented
The method of Claim 43, further comprising dispersing the O-D GQDs in water and dialyzing to isolate 0-D GQDs. Original
The method of Claim 43, wherein the dried graphite oxide (GO) and MnNi 3 are ground. Previously presented
The method of Claim 43, wherein the graphite oxide is functionalized graphite oxide (f-GO). Original
The method of Claim 43, wherein the 0-D Original
The method of Claim 43, wherein the 0-D
The method of Claim 43, wherein the dried oven prior to practicing the method of Claim 43.
The method of Claim [[51]] 52 wherein the [[is]] surface passivated functionalized graphite oxide (f-GO PEG) is manufactured under sonication. Currently amended
60-68. Canceled
Canceled GQDs emit blue light upon exposure to UV light. GQDs are biocompatible. Original GQDs are biocompatible. Original graphite oxide (GO) is dried in a heated vacuum Previously presented vacuum oven is held at 50 °C. Original
Materials described outside the worked examples.
zero dimensional graphene quantum dots
graphite oxide
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 2.2 nm | zero dimensional graphene quantum dots |
Duration |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,926,202Patent drawings and their descriptions. Click a drawing to enlarge it.
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 making zero dimensional graphene quantum dots (0- D GQDs), the method comprising: placing graphite oxide (GO) in a furnace, wherein the graphite oxide is surface passivated by polyethylene glycol under sonication to form a functionalized graphite oxide (f-GO PEG); flushing the furnace with an inert gas at a temperature of about 20 ° C to about 30 ° C for about 15 minutes; introducing hydrogen (H 2) into the furnace at a temperature of about 1 8° C to about 33 °C; heating the functionalized graphite oxide at about 200 ° C in the presence of hydrogen (H 2); and cooling the furnace to room temperature. Previously presented
The method of Claim 1, wherein the inert gas is argon (Ar). Original
The method of Claim 1, further comprising dispersing the 0-D GQDs in water and dialyzing to separate pure 0-D GQDs from unreacted GO. Original
The method of Claim 1, wherein the heating at 200 ° C is performed for at least 30 minutes. Original
The method of Claim 1, wherein the 0-D GQDs are water soluble. Original
The method of Claim 1, wherein the 0-D GQDs emit blue light upon exposure to UV light. Original
The method of Claim 1, wherein the 0 -D GQDs are biocompatible. Original
The method of Claim 1, wherein the graphite oxide used to make the zero dimensional graphene quantum dots (0 -D GQDs) is dried in a heated vacuum oven prior to practicing the method of Claim 1. Original
3-4. Canceled
Canceled
7-9. Canceled
Canceled
Canceled
16-42. Canceled
Canceled
A method of making a composite of zero dimensional graphene Quantum Dots (0 -D GQD) and one dimensional carbon nanotubes (1-D CNT), the method comprising: placing a mixture of graphite oxide (GO) and MnNi 3 in a furnace; flushing the furnace with an inert gas; introducing hydrogen (H 2) into the furnace; heating the mixture to about 200 ° C in the presence of hydrogen for about 5 minutes; heating the mixture to about 700 °C; introducing acetylene to the furnace; and cooling the furnace to room temperature. Previously presented
The method of Claim 43, wherein the inert gas is argon (Ar). Original
The method of Claim 43, wherein flushing the furnace with argon is for about 15 minutes. Original
The method of Claim 43, wherein flushing the furnace with an inert gas is performed at about a temperature of 20 ° C-30 °C. Original
The method of Claim 43, wherein the mixture is heated with acetylene for about 20 minutes. Previously presented
The method of Claim 43, wherein the method also produces two- dimensional graphene sheets. Previously presented
The method of Claim 43, further comprising dispersing the O-D GQDs in water and dialyzing to isolate 0-D GQDs. Original
The method of Claim 43, wherein the dried graphite oxide (GO) and MnNi 3 are ground. Previously presented
The method of Claim 43, wherein the graphite oxide is functionalized graphite oxide (f-GO). Original
The method of Claim 43, wherein the 0-D Original
The method of Claim 43, wherein the 0-D
The method of Claim 43, wherein the dried oven prior to practicing the method of Claim 43.
The method of Claim [[51]] 52 wherein the [[is]] surface passivated functionalized graphite oxide (f-GO PEG) is manufactured under sonication. Currently amended
60-68. Canceled
Canceled GQDs emit blue light upon exposure to UV light. GQDs are biocompatible. Original GQDs are biocompatible. Original graphite oxide (GO) is dried in a heated vacuum Previously presented vacuum oven is held at 50 °C. Original
Materials described outside the worked examples.
zero dimensional graphene quantum dots
graphite oxide
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 2.2 nm | zero dimensional graphene quantum dots |
Duration |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,926,202Patent drawings and their descriptions. Click a drawing to enlarge it.
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 making zero dimensional graphene quantum dots (0- D GQDs), the method comprising: placing graphite oxide (GO) in a furnace, wherein the graphite oxide is surface passivated by polyethylene glycol under sonication to form a functionalized graphite oxide (f-GO PEG); flushing the furnace with an inert gas at a temperature of about 20 ° C to about 30 ° C for about 15 minutes; introducing hydrogen (H 2) into the furnace at a temperature of about 1 8° C to about 33 °C; heating the functionalized graphite oxide at about 200 ° C in the presence of hydrogen (H 2); and cooling the furnace to room temperature. Previously presented
The method of Claim 1, wherein the inert gas is argon (Ar). Original
The method of Claim 1, further comprising dispersing the 0-D GQDs in water and dialyzing to separate pure 0-D GQDs from unreacted GO. Original
The method of Claim 1, wherein the heating at 200 ° C is performed for at least 30 minutes. Original
The method of Claim 1, wherein the 0-D GQDs are water soluble. Original
The method of Claim 1, wherein the 0-D GQDs emit blue light upon exposure to UV light. Original
The method of Claim 1, wherein the 0 -D GQDs are biocompatible. Original
The method of Claim 1, wherein the graphite oxide used to make the zero dimensional graphene quantum dots (0 -D GQDs) is dried in a heated vacuum oven prior to practicing the method of Claim 1. Original
3-4. Canceled
Canceled
7-9. Canceled
Canceled
Canceled
16-42. Canceled
Canceled
A method of making a composite of zero dimensional graphene Quantum Dots (0 -D GQD) and one dimensional carbon nanotubes (1-D CNT), the method comprising: placing a mixture of graphite oxide (GO) and MnNi 3 in a furnace; flushing the furnace with an inert gas; introducing hydrogen (H 2) into the furnace; heating the mixture to about 200 ° C in the presence of hydrogen for about 5 minutes; heating the mixture to about 700 °C; introducing acetylene to the furnace; and cooling the furnace to room temperature. Previously presented
The method of Claim 43, wherein the inert gas is argon (Ar). Original
The method of Claim 43, wherein flushing the furnace with argon is for about 15 minutes. Original
The method of Claim 43, wherein flushing the furnace with an inert gas is performed at about a temperature of 20 ° C-30 °C. Original
The method of Claim 43, wherein the mixture is heated with acetylene for about 20 minutes. Previously presented
The method of Claim 43, wherein the method also produces two- dimensional graphene sheets. Previously presented
The method of Claim 43, further comprising dispersing the O-D GQDs in water and dialyzing to isolate 0-D GQDs. Original
The method of Claim 43, wherein the dried graphite oxide (GO) and MnNi 3 are ground. Previously presented
The method of Claim 43, wherein the graphite oxide is functionalized graphite oxide (f-GO). Original
The method of Claim 43, wherein the 0-D Original
The method of Claim 43, wherein the 0-D
The method of Claim 43, wherein the dried oven prior to practicing the method of Claim 43.
The method of Claim [[51]] 52 wherein the [[is]] surface passivated functionalized graphite oxide (f-GO PEG) is manufactured under sonication. Currently amended
60-68. Canceled
Canceled GQDs emit blue light upon exposure to UV light. GQDs are biocompatible. Original GQDs are biocompatible. Original graphite oxide (GO) is dried in a heated vacuum Previously presented vacuum oven is held at 50 °C. Original
Materials described outside the worked examples.
zero dimensional graphene quantum dots
graphite oxide
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 2.2 nm | zero dimensional graphene quantum dots |
Duration |
Related documents with shared materials, methods, properties, or citations.
surface passivated functionalized graphite oxide
hydrogen
H₂
argon
Ar
MnNi₃
acetylene
C₂H₂
one dimensional carbon nanotubes
two-dimensional graphene sheets
functionalized graphite oxide
polyethylene glycol
GQD-G-CNT composite
| 2700–3600 s |
| — |
Duration | 1–30 minutes | — |
Duration | 30–45 minutes | — |
Duration | 45–50 minutes | — |
Duration | 50–55 minutes | — |
Duration | 55–65 minutes | — |
Duration | 65–75 minutes | — |
Thickness | 440–450 nm | — |
Duration | 1–5 minutes | — |
Duration | 5–7 minutes | — |
Duration | 7–10 minutes | — |
Duration | 12–15 minutes | — |
Duration | 15–20 minutes | — |
Duration | 20–30 minutes | — |
Thickness | ≤ 50 nm | — |
Duration | ≥ 30 minutes | — |
Temperature | 20–30 °C | — |
Temperature | 8–33 °C | — |
Fibonacci sequence of twist angles in superconducting multi-layer graphene and hydrogenated graphitic fibers
surface passivated functionalized graphite oxide
hydrogen
H₂
argon
Ar
MnNi₃
acetylene
C₂H₂
one dimensional carbon nanotubes
two-dimensional graphene sheets
functionalized graphite oxide
polyethylene glycol
GQD-G-CNT composite
| 2700–3600 s |
| — |
Duration | 1–30 minutes | — |
Duration | 30–45 minutes | — |
Duration | 45–50 minutes | — |
Duration | 50–55 minutes | — |
Duration | 55–65 minutes | — |
Duration | 65–75 minutes | — |
Thickness | 440–450 nm | — |
Duration | 1–5 minutes | — |
Duration | 5–7 minutes | — |
Duration | 7–10 minutes | — |
Duration | 12–15 minutes | — |
Duration | 15–20 minutes | — |
Duration | 20–30 minutes | — |
Thickness | ≤ 50 nm | — |
Duration | ≥ 30 minutes | — |
Temperature | 20–30 °C | — |
Temperature | 8–33 °C | — |
Fibonacci sequence of twist angles in superconducting multi-layer graphene and hydrogenated graphitic fibers
surface passivated functionalized graphite oxide
hydrogen
H₂
argon
Ar
MnNi₃
acetylene
C₂H₂
one dimensional carbon nanotubes
two-dimensional graphene sheets
functionalized graphite oxide
polyethylene glycol
GQD-G-CNT composite
| 2700–3600 s |
| — |
Duration | 1–30 minutes | — |
Duration | 30–45 minutes | — |
Duration | 45–50 minutes | — |
Duration | 50–55 minutes | — |
Duration | 55–65 minutes | — |
Duration | 65–75 minutes | — |
Thickness | 440–450 nm | — |
Duration | 1–5 minutes | — |
Duration | 5–7 minutes | — |
Duration | 7–10 minutes | — |
Duration | 12–15 minutes | — |
Duration | 15–20 minutes | — |
Duration | 20–30 minutes | — |
Thickness | ≤ 50 nm | — |
Duration | ≥ 30 minutes | — |
Temperature | 20–30 °C | — |
Temperature | 8–33 °C | — |
Fibonacci sequence of twist angles in superconducting multi-layer graphene and hydrogenated graphitic fibers
surface passivated functionalized graphite oxide
hydrogen
H₂
argon
Ar
MnNi₃
acetylene
C₂H₂
one dimensional carbon nanotubes
two-dimensional graphene sheets
functionalized graphite oxide
polyethylene glycol
GQD-G-CNT composite
| 2700–3600 s |
| — |
Duration | 1–30 minutes | — |
Duration | 30–45 minutes | — |
Duration | 45–50 minutes | — |
Duration | 50–55 minutes | — |
Duration | 55–65 minutes | — |
Duration | 65–75 minutes | — |
Thickness | 440–450 nm | — |
Duration | 1–5 minutes | — |
Duration | 5–7 minutes | — |
Duration | 7–10 minutes | — |
Duration | 12–15 minutes | — |
Duration | 15–20 minutes | — |
Duration | 20–30 minutes | — |
Thickness | ≤ 50 nm | — |
Duration | ≥ 30 minutes | — |
Temperature | 20–30 °C | — |
Temperature | 8–33 °C | — |
Fibonacci sequence of twist angles in superconducting multi-layer graphene and hydrogenated graphitic fibers