Patent
US 9,725,324GRAPHENE QUANTUM DOTS SYNTHESIS METHOD
JI-LIN SHEN
US
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US 9,725,324Patent 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 graphene quantum dots synthesis method, comprising: fixing a graphene aqueous solution on a spin coater to spin the graphene aqueous solution, and the graphene aqueous solution includes deionized water and multiple graphene sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene aqueous solution; exfoliating the multiple graphene sheets of the graphene aqueous solution; and forming multiple quantum dots with nanosize in the graphene aqueous solution.
The graphene quantum dots synthesis method according to claim 1, further comprising: filtering the graphene aqueous solution by a molecular sieve material to eliminate the impurities of the graphene aqueous solution; and purifying the graphene aqueous solution by a centrifuge.
The graphene quantum dots synthesis method according to claim 1, wherein the pulsed laser energy is greater than 40 mJ.
A graphene quantum dots synthesis method, comprising: fixing a graphene oxide aqueous solution on a spin coater to spin the graphene oxide aqueous solution, and the graphene oxide aqueous solution includes deionized water and multiple graphene oxide sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene oxide aqueous solution; exfoliating the multiple graphene oxide sheets of the graphene oxide aqueous solution; and forming multiple quantum dots with nano-size in the graphene oxide aqueous solution.
The graphene quantum dots synthesis method according to claim 4, further comprising: filtering the graphene oxide aqueous solution by a molecular sieve material to eliminate the impurities of the graphene oxide aqueous solution; solution by a centrifuge.
The graphene quantum dots synthesis method energy is greater than 40 m J. 9 and purifying the graphene oxide aqueous according to claim 4, wherein the pulsed laser
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Graphene aqueous solution (deionized water + graphene sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 5 minutes of exfoliation, graphene quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
3 materials1 process step
Graphene oxide aqueous solution (deionized water + graphene oxide sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 20–30 minutes of exfoliation, graphene oxide quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
Materials described outside the worked examples.
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
average graphene quantum dot size | 14 nm | graphene quantum dots |
average graphene oxide quantum dot size | 14 nm |
Patent
Atlas literature
Patent
US 9,725,324Patent 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 graphene quantum dots synthesis method, comprising: fixing a graphene aqueous solution on a spin coater to spin the graphene aqueous solution, and the graphene aqueous solution includes deionized water and multiple graphene sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene aqueous solution; exfoliating the multiple graphene sheets of the graphene aqueous solution; and forming multiple quantum dots with nanosize in the graphene aqueous solution.
The graphene quantum dots synthesis method according to claim 1, further comprising: filtering the graphene aqueous solution by a molecular sieve material to eliminate the impurities of the graphene aqueous solution; and purifying the graphene aqueous solution by a centrifuge.
The graphene quantum dots synthesis method according to claim 1, wherein the pulsed laser energy is greater than 40 mJ.
A graphene quantum dots synthesis method, comprising: fixing a graphene oxide aqueous solution on a spin coater to spin the graphene oxide aqueous solution, and the graphene oxide aqueous solution includes deionized water and multiple graphene oxide sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene oxide aqueous solution; exfoliating the multiple graphene oxide sheets of the graphene oxide aqueous solution; and forming multiple quantum dots with nano-size in the graphene oxide aqueous solution.
The graphene quantum dots synthesis method according to claim 4, further comprising: filtering the graphene oxide aqueous solution by a molecular sieve material to eliminate the impurities of the graphene oxide aqueous solution; solution by a centrifuge.
The graphene quantum dots synthesis method energy is greater than 40 m J. 9 and purifying the graphene oxide aqueous according to claim 4, wherein the pulsed laser
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Graphene aqueous solution (deionized water + graphene sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 5 minutes of exfoliation, graphene quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
3 materials1 process step
Graphene oxide aqueous solution (deionized water + graphene oxide sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 20–30 minutes of exfoliation, graphene oxide quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
Materials described outside the worked examples.
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
average graphene quantum dot size | 14 nm | graphene quantum dots |
average graphene oxide quantum dot size | 14 nm |
Patent
Atlas literature
Patent
US 9,725,324Patent 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 graphene quantum dots synthesis method, comprising: fixing a graphene aqueous solution on a spin coater to spin the graphene aqueous solution, and the graphene aqueous solution includes deionized water and multiple graphene sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene aqueous solution; exfoliating the multiple graphene sheets of the graphene aqueous solution; and forming multiple quantum dots with nanosize in the graphene aqueous solution.
The graphene quantum dots synthesis method according to claim 1, further comprising: filtering the graphene aqueous solution by a molecular sieve material to eliminate the impurities of the graphene aqueous solution; and purifying the graphene aqueous solution by a centrifuge.
The graphene quantum dots synthesis method according to claim 1, wherein the pulsed laser energy is greater than 40 mJ.
A graphene quantum dots synthesis method, comprising: fixing a graphene oxide aqueous solution on a spin coater to spin the graphene oxide aqueous solution, and the graphene oxide aqueous solution includes deionized water and multiple graphene oxide sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene oxide aqueous solution; exfoliating the multiple graphene oxide sheets of the graphene oxide aqueous solution; and forming multiple quantum dots with nano-size in the graphene oxide aqueous solution.
The graphene quantum dots synthesis method according to claim 4, further comprising: filtering the graphene oxide aqueous solution by a molecular sieve material to eliminate the impurities of the graphene oxide aqueous solution; solution by a centrifuge.
The graphene quantum dots synthesis method energy is greater than 40 m J. 9 and purifying the graphene oxide aqueous according to claim 4, wherein the pulsed laser
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Graphene aqueous solution (deionized water + graphene sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 5 minutes of exfoliation, graphene quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
3 materials1 process step
Graphene oxide aqueous solution (deionized water + graphene oxide sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 20–30 minutes of exfoliation, graphene oxide quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
Materials described outside the worked examples.
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
average graphene quantum dot size | 14 nm | graphene quantum dots |
average graphene oxide quantum dot size | 14 nm |
Patent
Atlas literature
Patent
US 9,725,324Patent 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 graphene quantum dots synthesis method, comprising: fixing a graphene aqueous solution on a spin coater to spin the graphene aqueous solution, and the graphene aqueous solution includes deionized water and multiple graphene sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene aqueous solution; exfoliating the multiple graphene sheets of the graphene aqueous solution; and forming multiple quantum dots with nanosize in the graphene aqueous solution.
The graphene quantum dots synthesis method according to claim 1, further comprising: filtering the graphene aqueous solution by a molecular sieve material to eliminate the impurities of the graphene aqueous solution; and purifying the graphene aqueous solution by a centrifuge.
The graphene quantum dots synthesis method according to claim 1, wherein the pulsed laser energy is greater than 40 mJ.
A graphene quantum dots synthesis method, comprising: fixing a graphene oxide aqueous solution on a spin coater to spin the graphene oxide aqueous solution, and the graphene oxide aqueous solution includes deionized water and multiple graphene oxide sheets; irradiating a pulsed laser outputted from a laser source to focus on the spinning of the graphene oxide aqueous solution; exfoliating the multiple graphene oxide sheets of the graphene oxide aqueous solution; and forming multiple quantum dots with nano-size in the graphene oxide aqueous solution.
The graphene quantum dots synthesis method according to claim 4, further comprising: filtering the graphene oxide aqueous solution by a molecular sieve material to eliminate the impurities of the graphene oxide aqueous solution; solution by a centrifuge.
The graphene quantum dots synthesis method energy is greater than 40 m J. 9 and purifying the graphene oxide aqueous according to claim 4, wherein the pulsed laser
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
Graphene aqueous solution (deionized water + graphene sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 5 minutes of exfoliation, graphene quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
3 materials1 process step
Graphene oxide aqueous solution (deionized water + graphene oxide sheets) is fixed on a spin coater at 80 RPM. A pulsed laser (>40 mJ) is irradiated onto the spinning solution. After 20–30 minutes of exfoliation, graphene oxide quantum dots with an average size of 14 nm are formed. The solution is then filtered through a molecular sieve (pore size 0.22 µm) and purified by centrifuge at 6000 RPM.
Materials described outside the worked examples.
deionized water
H₂O
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
average graphene quantum dot size | 14 nm | graphene quantum dots |
average graphene oxide quantum dot size | 14 nm |
photoluminescence blue-green waveband range | — | graphene quantum dots |
photoluminescence blue-green waveband range | — | graphene quantum dots |
photoluminescence blue-green waveband range | — | graphene quantum dots |
photoluminescence blue-green waveband range | — | graphene quantum dots |