. 20005984 021815 24 Description [Invention Title] METHOD FOR PRODUCING FOAM-SHAPED GRAPHENE STRUCTURE BY BOILING, AND FOAM-SHAPED GRAPHENE STRUCTURE USING SAME 5 [Technical Field] The present invention relates to a foam-shaped graphene structure, and more particularly, to a method for producing a foam-shaped graphene structure by boiling, and a foam- shaped graphene structure prepared using the same. 10 [Background Art] Since A. Geim and K. Novoselov have simply and successfully isolated a graphene monolayer, which is composed of ﬂat plates having a thickness corresponding to one sp 2 -bound carbon atom, from graphite using a so-called Scotch tape method in 2004, a variety of research groups have conducted ardent research on graphene in an 15 attempt to understand and employ abnormal characteristics such as superior electronic characteristics (semimetals, zero-gap semiconductors, a high electron mobility of 15,000 cm 2V-is-, and a resistance of 10 -6 £i lower than silver), thermal conductivity (5,000 Wm -1K-1), optical characteristics (transparency and absorbing only 2.3 % of white light), a high mechanical strength (200 times higher than steel), and a high surface area 20 per unit mass (solution characteristics, and a face area of 3,000 m 2g1).

graphenegraphene

thickness

Thickness

FIG. 2A) The base graphene layer is an assembly 2-D RGO platelet including 5 to 10 RGO layers, 5 and evenly stacked on a substrate. This will comply with a …

Figure references

graphenegraphene

sem

SEM

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

xps

XPS

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

sem

SEM

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

optical absorption

Optical Absorption

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

afm

AFM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 6B is a side view showing a HRSEM image of the SFG ﬁlm. The size of the pores is in a range of 1 to 3 m, which is identical to the size as viewed from a …

Figure references

raman spectroscopy

Raman Spectroscopy

FIG. 7 shows the characteristics of the SFG structure, that is, Raman spectra, UPS spectra, and work functions of GO, RGO and S FG.

Figure references

thickness

Thickness

FIG. 8B). While the repeated formation and growth of the bubbles are achieved, a liquid ﬁlm having a ﬁne thickness (i.e., a microlayer) formed on a bottom …

Figure references

GraphenegrapheneGraphenegraphene

sem

SEM

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

thickness

Thickness

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
base graphene layer (BGL) thickness	50–100 nm	reduced graphene oxide
RGO seed size in water (AFM)	0.5–1 µm	reduced graphene oxide

Claims

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

1 independent · 6 dependent

1
Independentreduced graphene oxidefoam-shaped graphene structure (self-assembled foam-like graphene, SFG)foam-shaped graphene structure on base substrate
[CLAIMS] [Claim 1] A method for producing a foam-shaped graphene structure by boiling, comprising the steps of: 5 preparing a base substrate (S i); placing the base substrate in a reduced graphene oxide (RGO) colloid solution (S₂); applying a heat ﬂux to the base substrate using an exothermic body so as to cause boiling (S₃); and 10 generating a foam-shaped graphene structure on the base substrate as bubbles generated by the boiling overlap (S₄).
1. 2
  Dependent← claim 1base substrate (silicone, TCO glass, metal, mother glass, or elastic polymer)
  [Claim 2] The method of claim 1, wherein the base substrate in Step S i is at least one selected from the group consisting of silicone, a transparent conductive oxide (TCO) 15 glass, a metal, a mother glass, and an elastic polymer.
2. 3
  Dependent← claim 1reduced graphene oxideN₂H₄
  [Claim 3] The method of claim 1, wherein the graphene oxide in Step S₂ is reduced by hydrazine. [Claim 4] 20 The method of claim 1, wherein the reduced graphene oxide is present at a content of 0.01 to 0.0001 % wt in the colloid solution in Step S2.
3. 5
  Dependent← claim 1reduced graphene oxide
  [Claim 5] The method of claim 1, wherein the reduced graphene oxide is present at a 22 content of 0.005 % wt in the colloid solution in Step S2.
4. 6
  Dependent← claim 1
  [Claim 6] The method of claim 1, wherein the base substrate itself serves as a heater instead of the exothermic body in Step S3.
5. 7
  Dependent← claim 1
  5 [Claim 7] The method of claim 1, wherein the heat ﬂux in Step S₃ is adjusted within a range of 100 kW/m 2 to 1,500 kW/m2.
6. 8
  Dependent← claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7foam-shaped graphene structure (self-assembled foam-like graphene, SFG)foam-shaped graphene structure on base substrate
  [Claim 8] A foam-shaped graphene structure produced by the method for producing a foam-shaped graphene structure by boiling as deﬁned in any one of claims 1 to 7. 23

Characterization

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

device performance measurement

Device Performance Measurement

FIG. 1 1 C shows the performance of Au, 2-D-RGO and SFG- 5 based QDSSCs. [Embodiment] Hereinafter, preferred embodiments of a method for producing a …

Figure references

graphenegraphene

thickness

Thickness

FIG. 2A) The base graphene layer is an assembly 2-D RGO platelet including 5 to 10 RGO layers, 5 and evenly stacked on a substrate. This will comply with a …

Figure references

graphenegraphene

sem

SEM

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

xps

XPS

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

sem

SEM

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

optical absorption

Optical Absorption

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

afm

AFM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 6B is a side view showing a HRSEM image of the SFG ﬁlm. The size of the pores is in a range of 1 to 3 m, which is identical to the size as viewed from a …

Figure references

raman spectroscopy

Raman Spectroscopy

FIG. 7 shows the characteristics of the SFG structure, that is, Raman spectra, UPS spectra, and work functions of GO, RGO and S FG.

Figure references

thickness

Thickness

FIG. 8B). While the repeated formation and growth of the bubbles are achieved, a liquid ﬁlm having a ﬁne thickness (i.e., a microlayer) formed on a bottom …

Figure references

GraphenegrapheneGraphenegraphene

sem

SEM

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

thickness

Thickness

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
base graphene layer (BGL) thickness	50–100 nm	reduced graphene oxide
RGO seed size in water (AFM)	0.5–1 µm	reduced graphene oxide

Claims

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

1 independent · 6 dependent

1
Independentreduced graphene oxidefoam-shaped graphene structure (self-assembled foam-like graphene, SFG)foam-shaped graphene structure on base substrate
[CLAIMS] [Claim 1] A method for producing a foam-shaped graphene structure by boiling, comprising the steps of: 5 preparing a base substrate (S i); placing the base substrate in a reduced graphene oxide (RGO) colloid solution (S₂); applying a heat ﬂux to the base substrate using an exothermic body so as to cause boiling (S₃); and 10 generating a foam-shaped graphene structure on the base substrate as bubbles generated by the boiling overlap (S₄).
1. 2
  Dependent← claim 1base substrate (silicone, TCO glass, metal, mother glass, or elastic polymer)
  [Claim 2] The method of claim 1, wherein the base substrate in Step S i is at least one selected from the group consisting of silicone, a transparent conductive oxide (TCO) 15 glass, a metal, a mother glass, and an elastic polymer.
2. 3
  Dependent← claim 1reduced graphene oxideN₂H₄
  [Claim 3] The method of claim 1, wherein the graphene oxide in Step S₂ is reduced by hydrazine. [Claim 4] 20 The method of claim 1, wherein the reduced graphene oxide is present at a content of 0.01 to 0.0001 % wt in the colloid solution in Step S2.
3. 5
  Dependent← claim 1reduced graphene oxide
  [Claim 5] The method of claim 1, wherein the reduced graphene oxide is present at a 22 content of 0.005 % wt in the colloid solution in Step S2.
4. 6
  Dependent← claim 1
  [Claim 6] The method of claim 1, wherein the base substrate itself serves as a heater instead of the exothermic body in Step S3.
5. 7
  Dependent← claim 1
  5 [Claim 7] The method of claim 1, wherein the heat ﬂux in Step S₃ is adjusted within a range of 100 kW/m 2 to 1,500 kW/m2.
6. 8
  Dependent← claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7foam-shaped graphene structure (self-assembled foam-like graphene, SFG)foam-shaped graphene structure on base substrate
  [Claim 8] A foam-shaped graphene structure produced by the method for producing a foam-shaped graphene structure by boiling as deﬁned in any one of claims 1 to 7. 23

Characterization

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

device performance measurement

Device Performance Measurement

FIG. 1 1 C shows the performance of Au, 2-D-RGO and SFG- 5 based QDSSCs. [Embodiment] Hereinafter, preferred embodiments of a method for producing a …

Figure references

graphenegraphene

thickness

Thickness

FIG. 2A) The base graphene layer is an assembly 2-D RGO platelet including 5 to 10 RGO layers, 5 and evenly stacked on a substrate. This will comply with a …

Figure references

graphenegraphene

sem

SEM

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

xps

XPS

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

sem

SEM

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

optical absorption

Optical Absorption

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

afm

AFM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 6B is a side view showing a HRSEM image of the SFG ﬁlm. The size of the pores is in a range of 1 to 3 m, which is identical to the size as viewed from a …

Figure references

raman spectroscopy

Raman Spectroscopy

FIG. 7 shows the characteristics of the SFG structure, that is, Raman spectra, UPS spectra, and work functions of GO, RGO and S FG.

Figure references

thickness

Thickness

FIG. 8B). While the repeated formation and growth of the bubbles are achieved, a liquid ﬁlm having a ﬁne thickness (i.e., a microlayer) formed on a bottom …

Figure references

GraphenegrapheneGraphenegraphene

sem

SEM

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

thickness

Thickness

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
base graphene layer (BGL) thickness	50–100 nm	reduced graphene oxide
RGO seed size in water (AFM)	0.5–1 µm	reduced graphene oxide

Claims

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

1 independent · 6 dependent

1
Independentreduced graphene oxidefoam-shaped graphene structure (self-assembled foam-like graphene, SFG)foam-shaped graphene structure on base substrate
[CLAIMS] [Claim 1] A method for producing a foam-shaped graphene structure by boiling, comprising the steps of: 5 preparing a base substrate (S i); placing the base substrate in a reduced graphene oxide (RGO) colloid solution (S₂); applying a heat ﬂux to the base substrate using an exothermic body so as to cause boiling (S₃); and 10 generating a foam-shaped graphene structure on the base substrate as bubbles generated by the boiling overlap (S₄).
1. 2
  Dependent← claim 1base substrate (silicone, TCO glass, metal, mother glass, or elastic polymer)
  [Claim 2] The method of claim 1, wherein the base substrate in Step S i is at least one selected from the group consisting of silicone, a transparent conductive oxide (TCO) 15 glass, a metal, a mother glass, and an elastic polymer.
2. 3
  Dependent← claim 1reduced graphene oxideN₂H₄
  [Claim 3] The method of claim 1, wherein the graphene oxide in Step S₂ is reduced by hydrazine. [Claim 4] 20 The method of claim 1, wherein the reduced graphene oxide is present at a content of 0.01 to 0.0001 % wt in the colloid solution in Step S2.
3. 5
  Dependent← claim 1reduced graphene oxide
  [Claim 5] The method of claim 1, wherein the reduced graphene oxide is present at a 22 content of 0.005 % wt in the colloid solution in Step S2.
4. 6
  Dependent← claim 1
  [Claim 6] The method of claim 1, wherein the base substrate itself serves as a heater instead of the exothermic body in Step S3.
5. 7
  Dependent← claim 1
  5 [Claim 7] The method of claim 1, wherein the heat ﬂux in Step S₃ is adjusted within a range of 100 kW/m 2 to 1,500 kW/m2.
6. 8
  Dependent← claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7foam-shaped graphene structure (self-assembled foam-like graphene, SFG)foam-shaped graphene structure on base substrate
  [Claim 8] A foam-shaped graphene structure produced by the method for producing a foam-shaped graphene structure by boiling as deﬁned in any one of claims 1 to 7. 23

Characterization

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

device performance measurement

Device Performance Measurement

FIG. 1 1 C shows the performance of Au, 2-D-RGO and SFG- 5 based QDSSCs. [Embodiment] Hereinafter, preferred embodiments of a method for producing a …

Figure references

graphenegraphene

thickness

Thickness

FIG. 2A) The base graphene layer is an assembly 2-D RGO platelet including 5 to 10 RGO layers, 5 and evenly stacked on a substrate. This will comply with a …

Figure references

graphenegraphene

sem

SEM

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

xps

XPS

FIG. 3B, the (C- C and C=C)/(C-O+C=O+C(O)O) ratio of GO (1.1) increases to 1.8 (RGO) and 2.1 (SFG) due to recovery of a sp 2 domain. These results show that …

Figure references

sem

SEM

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

optical absorption

Optical Absorption

FIG. 4B. Water on the SFG layer at 30 ° C and 0.6 bar is observed using a digital camera. Several droplets are generated on the SFG layer. Most of the droplets …

Figure references

afm

AFM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 5 D is a diagram showing an AFM image of the SFG structure. The size of the pores is generally in a range of 1 to 5 p m. The RGO platelets 5 are tightly …

Figure references

sem

SEM

FIG. 6B is a side view showing a HRSEM image of the SFG ﬁlm. The size of the pores is in a range of 1 to 3 m, which is identical to the size as viewed from a …

Figure references

raman spectroscopy

Raman Spectroscopy

FIG. 7 shows the characteristics of the SFG structure, that is, Raman spectra, UPS spectra, and work functions of GO, RGO and S FG.

Figure references

thickness

Thickness

FIG. 8B). While the repeated formation and growth of the bubbles are achieved, a liquid ﬁlm having a ﬁne thickness (i.e., a microlayer) formed on a bottom …

Figure references

GraphenegrapheneGraphenegraphene

sem

SEM

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references

thickness

Thickness

FIGS. 9D and 10). The three ﬁlms except copper (the metals are opaque) exhibit semi-transparency even when the ﬁlms have an extremely thin thickness …

Figure references