METHOD AND APPARATUS FOR AEROSOL-BASED THREE-DIMENSIONAL (3D) PRINTING OF FLEXIBLE GRAPHENE ELECTRONIC DEVICES

Ehsan TOYSERKANI

Patent

Atlas literature

Patent

US 10,400,119

METHOD AND APPARATUS FOR AEROSOL-BASED THREE-DIMENSIONAL (3D) PRINTING OF FLEXIBLE GRAPHENE ELECTRONIC DEVICES

Ehsan TOYSERKANI

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

3 independent · 13 dependent

11
Independentgraphenefirst solventsecond solventstabilized graphene powderflexible graphene electronic device
A method of three-dimensional (3D) printing of a ﬂexible graphene electronic device comprising: producing a printer ink solution, for use in aerosol-based printing, the printer ink solution including a stabilized graphene powder, a ﬁrst solvent able to dissolve a high concentration of graphene within the stabilized graphene powder and having a surface tension for use in 3D printing; and a second solvent having a high viscosity, a high boiling point and able to dissolve the graphene within the stabilized g raphene powder wherein a size of g raphene ﬂakes within the stabilized g raphene powder is less than about 200 nm; generating a mist of atomized particles of the aerosol-based printer ink solution; and delivering mist of atomized particles of the aerosol-based printer ink solution to a 3D printing apparatus. Currently amended
1. 12
  Dependent← claim 11graphenefirst solventsecond solventstabilized graphene powderflexible graphene electronic device
  The method of Claim 11 further comprising: 3D printing the ﬂexible graphene electronic device with the mist of atomized particles of the printer ink solution. Currently amended
2. 13
  Dependent← claim 11graphenefirst solventsecond solventstabilized graphene powdergraphitealcohol
  The method of Claim 11 wherein producing [[a]]the printer ink solution comprises: exfoliating graphite in an alcohol to produce the graphite ﬂakes in the alcoho l; adding stabilizing polymer to the graphite ﬂakes in the alcohol; drying the graphite ﬂakes in the alcohol to produce the stabilized g raphen powder; mixing in [[a]]the ﬁrst solvent with the stabilized g raphen powder; and mixing in [[a]]the second solvent to produce [[a]]the printer ink solution. Currently amended
3. 26
  Dependent← claim 11
  The method of Claim 11 further comprising agitating the printer ink solution after producing the printer ink solution. Currently amended
17
Independent
Withdrawn
23
Independentgraphitealcohol
The method of Claim [[16]] 19 wherein ﬂocculating the graphite ﬂakes in the alcohol comprises: adding a salt solution to the graphite ﬂakes in the alcohol. Currently amended

Device structures

Layer stacks claimed or described, ordered top of device to substrate.

flexible graphene electronic device

stabilized graphene powderactive material

Materials

Materials described outside the worked examples.

graphene

Active Electronic Material

first solvent

Ink Solvent Primary

cyclohexanone

Process steps

Additional fabrication and treatment steps described in the patent.

Ink Preparation

Step 1

Process details

steps:exfoliating graphite in an alcohol using sonication, applying centrifugal force after exfoliation, flocculating graphite flakes in the alcohol by adding a salt solution, adding stabilizing polymer to the graphite flakes in the alcohol, drying the graphite flakes in the alcohol to produce stabilized graphene powder, filtering the stabilized graphene powder, mixing in the first solvent with the stabilized graphene powder, mixing in the second solvent to produce the printer ink solution, agitating the printer ink solution

graphene flake size:less than about 200 nm

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
Voltage	40–50 V	—
Thickness

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