Method of Preparing Nitrogen-Doped Graphene

Moon Ho Ham

Patent

Atlas literature

Patent

US 10,615,030

Method of Preparing Nitrogen-Doped Graphene

Moon Ho Ham

Drawings

Patent drawings and their descriptions. Click a drawing to enlarge it.

FIG. 1

FIG. 1 illustrates a method of doping synthesized graphene by a high temperature heat treatment in a gas atmosphere containing a dopant;

FIG. 2

FIG. 2 schematically illustrates a process of preparing nitrogen-doped graphene using pyridine;

FIG. 3

FIG. 3 is a process chart illustrating synthesis of a graphene thin ﬁlm by a one-step process;

FIG. 4

FIG. 4 illustrates the results on the optical micr osco pe image and Raman spectrum of a graphene thin ﬁlm synthesized by a o ne-step pr o cess depending o n …

FIG. 5

FIG. 5 illustrates the results on I₂ G/D and I D/G in the Raman spectrum, the surface c o verage, and the growth rate of a graphene thin ﬁlm synthesized by a o …

FIG. 6

FIG. 6 is a process chart illustrating synthesis of a graphene thin ﬁlm by a two-step process;

FIG. 7

FIG. 7 illustrates the results on the optical microscope image and Raman spectrum of a graphene thin ﬁlm synthesized by a two-step process depending on the ﬂow …

FIG. 8

FIG. 8 illustrates the results on I₂ G/n and In/G in the Raman spectrum and the surface coverage of a graphene thin ﬁlm synthesized by a two-step process …

FIG. 9

FIG. 9 illustrates the results on the optical microscope image and Raman spectrum of a graphene thin ﬁlm synthesized by a two-step process depending on the …

FIG. 10

FIG. 10 illustrates the results on I₂ G/D and I D/G in the Raman spectrum, the surface c o verage, and the transmittance of a graphene thin ﬁlm synthesized by …

FIG. 11

FIG. 11 illustrates the results o n a Raman mapping image at the positions of 2D and G peaks of graphene synthesized by a two-step process;

FIG. 12

FIG. 12 illustrates the results on comparative analysis of the work function and the concentration of nitrogen element between graphene synthesized by a …

FIG. 13

FIG. 13 illustrates a schematic diagram and I d-V g and Id-ld pr o perties o f a ﬁeld-eﬀect transist o r fabricated using graphene synthesized by a two-step …

Claims

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

2 independent · 10 dependent

1
Independentnitrogen-doped graphenenitrogen compound
A method of preparing nitrogen-doped graphene, the method comprising: (a) loading a catalytic metal into a chemical vapor deposition system; (b) increasing an internal temperature of the chemical vapor deposition system to conduct a heat treatment of the catalytic metal; and (c) injecting a nitrogen compound into the chemical vapor deposition system wherein the injection of a nitrogen compound in the step (c) comprises: injecting the nitrogen compound in a ﬁrst amount of a ﬁrst nitrogen compound; and then injecting the nitrogen compound in a second amount of second nitrogen compound wherein: the second amount of the second nitrogen compound injected is greater than the ﬁrst amount of the ﬁrst nitrogen compound injected. Currently amended
1. 2
  Dependent← claim 1nitrogen-doped graphenenitrogen compound
  The method of preparing nitrogen-doped graphene according to claim 1, wherein the injection of [[a]] the nitrogen compound in the step (c) comprises: generating the nitrogen compound using a bubbler; and injecting the nitrogen compound using an inert gas as a carrier gas. Currently amended
4
Independent
Canceled
1. 5
  Dependent← claim 4nitrogen-doped graphenenitrogen compound
  The method of preparing nitrogen-doped graphene according to claim 4, comprising: controlling the ﬁrst amount of ﬁrst nitrogen compound and the amount of second nitrogen compound by a ﬁrst amount of a ﬁrst carrier gas injected and a second amount of a second carrier gas injected, respectively. Previously presented

Device structures

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

field-effect transistor

nitrogen-doped graphenechannel

Materials

Materials described outside the worked examples.

nitrogen-doped graphene

Synthesis Target

nitrogen compound

Precursor Nitrogen Source

Process steps

Additional fabrication and treatment steps described in the patent.

Cvd Growth

Step 1

Process details

step a:loading catalytic metal into CVD system

step b:increasing internal temperature for heat treatment of catalytic metal

step c:injecting nitrogen compound in two steps: first a smaller amount, then a larger amount

Characterization

Measurements and analyses referenced in the patent, with their drawing references.

raman spectroscopy

Raman Spectroscopy

FIG. 4 illustrates the results on the optical micr osco pe image and Raman spectrum of a graphene thin ﬁlm synthesized by a o ne-step pr o cess depending o n …

Figure references

FIG. 4

graphene

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
Flow Rate	100–200 sccm	—
Duration

Why these are connected

Related documents with shared materials, methods, properties, or citations.

Method of Preparing Nitrogen-Doped Graphene | Matter42 Literature