Patent
US 8,900,542METHOD FOR FORMING GRAPHENE NANORIBBONS
Chia-Liang SUN, Ching-Tang CHANG
2014-12-02·US
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Patent
US 8,900,542Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons i- wherein the method further comprises, before step (b), a step of (d) microwave heating the nanotube-dispersing solution to surface-modify the carbon nanotubes.
The method of Claim 1, wherein the solvent has a pH value of not greater than 4.
The method of Claim 1, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 1, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perchlorate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 1, wherein step (c) is conducted at a microwave power ranging from watts to 2000 watts.
The method of Claim 1, wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 1, wherein step (c) is conducted at a temperature ranging from 50 ° C to 100 0C.
The method of Claim 1, wherein the solvent has a pH value ranging from 1 to 3.
canceled
The method of Claim [11] 1, wherein step (d) is conducted at a microwave power ranging from 150 watts to 300 watts for not more than 5 minutes.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons; wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 14, wherein the solvent has a pH value of not greater than 4.
The method of Claim 14, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 14, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perch l orate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 14, wherein step (c) is conducted at a microwave power ranging from 50 watts to 2000 watts.
The method of Claim 14, wherein step (c) is conducted at a temperature ranging from 5 0° C to 100 *C.
Materials described outside the worked examples.
carbon nanotubes
oxidant
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 60–80 °C | — |
Duration | ≥ 10 minutes |
Patent
Atlas literature
Patent
US 8,900,542Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons i- wherein the method further comprises, before step (b), a step of (d) microwave heating the nanotube-dispersing solution to surface-modify the carbon nanotubes.
The method of Claim 1, wherein the solvent has a pH value of not greater than 4.
The method of Claim 1, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 1, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perchlorate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 1, wherein step (c) is conducted at a microwave power ranging from watts to 2000 watts.
The method of Claim 1, wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 1, wherein step (c) is conducted at a temperature ranging from 50 ° C to 100 0C.
The method of Claim 1, wherein the solvent has a pH value ranging from 1 to 3.
canceled
The method of Claim [11] 1, wherein step (d) is conducted at a microwave power ranging from 150 watts to 300 watts for not more than 5 minutes.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons; wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 14, wherein the solvent has a pH value of not greater than 4.
The method of Claim 14, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 14, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perch l orate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 14, wherein step (c) is conducted at a microwave power ranging from 50 watts to 2000 watts.
The method of Claim 14, wherein step (c) is conducted at a temperature ranging from 5 0° C to 100 *C.
Materials described outside the worked examples.
carbon nanotubes
oxidant
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 60–80 °C | — |
Duration | ≥ 10 minutes |
Patent
Atlas literature
Patent
US 8,900,542Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons i- wherein the method further comprises, before step (b), a step of (d) microwave heating the nanotube-dispersing solution to surface-modify the carbon nanotubes.
The method of Claim 1, wherein the solvent has a pH value of not greater than 4.
The method of Claim 1, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 1, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perchlorate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 1, wherein step (c) is conducted at a microwave power ranging from watts to 2000 watts.
The method of Claim 1, wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 1, wherein step (c) is conducted at a temperature ranging from 50 ° C to 100 0C.
The method of Claim 1, wherein the solvent has a pH value ranging from 1 to 3.
canceled
The method of Claim [11] 1, wherein step (d) is conducted at a microwave power ranging from 150 watts to 300 watts for not more than 5 minutes.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons; wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 14, wherein the solvent has a pH value of not greater than 4.
The method of Claim 14, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 14, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perch l orate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 14, wherein step (c) is conducted at a microwave power ranging from 50 watts to 2000 watts.
The method of Claim 14, wherein step (c) is conducted at a temperature ranging from 5 0° C to 100 *C.
Materials described outside the worked examples.
carbon nanotubes
oxidant
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 60–80 °C | — |
Duration | ≥ 10 minutes |
Patent
Atlas literature
Patent
US 8,900,542Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons i- wherein the method further comprises, before step (b), a step of (d) microwave heating the nanotube-dispersing solution to surface-modify the carbon nanotubes.
The method of Claim 1, wherein the solvent has a pH value of not greater than 4.
The method of Claim 1, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 1, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perchlorate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 1, wherein step (c) is conducted at a microwave power ranging from watts to 2000 watts.
The method of Claim 1, wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 1, wherein step (c) is conducted at a temperature ranging from 50 ° C to 100 0C.
The method of Claim 1, wherein the solvent has a pH value ranging from 1 to 3.
canceled
The method of Claim [11] 1, wherein step (d) is conducted at a microwave power ranging from 150 watts to 300 watts for not more than 5 minutes.
A method for forming graphene nanoribbons, comprising: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons; wherein step (c) is conducted for not more than 10 minutes.
The method of Claim 14, wherein the solvent has a pH value of not greater than 4.
The method of Claim 14, wherein a weight ratio of the oxidant to the carbon nanotubes is not less than 2/1.
The method of Claim 14, wherein the oxidant is selected from the group consisting of potassium chlorate, sodium chlorate, potassium perch l orate, hydrogen peroxide, potassium permanganate and combinations thereof.
The method of Claim 14, wherein step (c) is conducted at a microwave power ranging from 50 watts to 2000 watts.
The method of Claim 14, wherein step (c) is conducted at a temperature ranging from 5 0° C to 100 *C.
Materials described outside the worked examples.
carbon nanotubes
oxidant
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Temperature | 60–80 °C | — |
Duration | ≥ 10 minutes |
potassium chlorate
KClO₃
sodium chlorate
NaClO₃
potassium perchlorate
KClO₄
hydrogen peroxide
H₂O₂
potassium permanganate
KMnO₄
graphene nanoribbons
| — |
Duration | ≥ 5 minutes | — |
potassium chlorate
KClO₃
sodium chlorate
NaClO₃
potassium perchlorate
KClO₄
hydrogen peroxide
H₂O₂
potassium permanganate
KMnO₄
graphene nanoribbons
| — |
Duration | ≥ 5 minutes | — |
potassium chlorate
KClO₃
sodium chlorate
NaClO₃
potassium perchlorate
KClO₄
hydrogen peroxide
H₂O₂
potassium permanganate
KMnO₄
graphene nanoribbons
| — |
Duration | ≥ 5 minutes | — |
potassium chlorate
KClO₃
sodium chlorate
NaClO₃
potassium perchlorate
KClO₄
hydrogen peroxide
H₂O₂
potassium permanganate
KMnO₄
graphene nanoribbons
| — |
Duration | ≥ 5 minutes | — |