Defect driven tailoring of colossal dielectricity of Reduced Graphene Oxide
Source abstract
Abstract
Abstract Reduced graphene oxide (RGO) is prepared in two different chemical routes where reduction of graphene oxide is performed by hydrazine hydrate and through high pressure in hydrothermal reactor. Samples are characterized by X-ray powdered diffraction (XRD), thermo gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and tunneling electron microscopy (TEM). Types of defects are probed by Raman, FTIR spectroscopy and X-ray photoelectron spectroscopy (XPS). UV–vis absorption reveals different optical band gaps of the two RGOs. Conductivity mechanism is studied through I – V measurements displaying different characteristic features which are addressed due to the presence of defects appeared in different synthesis. Significantly high value (∼10 4 ) of dielectric permittivity at 10 MHz is attractive for technological application which could be tuned by the defects present in RGO.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphene research and applications · Graphene and Nanomaterials Applications · Advancements in Battery Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
Show source-provided references
1. Nobel lecture: graphene: materials in the flatland10.1103/RevModPhys.83.837 ↗
2. Nobel lecture: random walk to graphene10.1103/RevModPhys.83.851 ↗
3. Highly sensitive large area multi-layered graphene based flexible ammonia sensor10.1016/j.snb.2014.08.044 ↗
4. Graphene oxide based low cost battery10.1016/j.matlet.2013.09.011 ↗
5. Tunable optical properties of graphene oxide by tailoring the oxygen functionalities using infrared irradiation10.1088/0957-4484/25/49/495704 ↗
6. An overview of the engineered graphene nanostructures and nanocomposites10.1039/c3ra44621b ↗
7. Graphene and MWCNT based bi-functional polymer nanocomposites with enhanced microwave absorption and supercapacitor property10.1016/j.materresbull.2015.02.040 ↗
8. Graphene: status and prospects10.1126/science.1158877 ↗
9. Highly conductive, free-standing and flexible graphene papers for energy conversion and storage devices10.1039/c3ra23500a ↗
10. Free-standing graphene at atomic resolution10.1038/nnano.2008.280 ↗
11. Probing the nature of defects in graphene by Raman spectroscopy10.1021/nl300901a ↗
12. Structural defects in graphene10.1021/nn102598m ↗
13. Bandgap engineering through nanocrystalline magnetic alloy grafting on reduced graphene oxide10.1039/C4CP02259A ↗
14. Chemical functionalization of graphene with defects10.1021/nl802234n ↗
15. Electric field effect in atomically thin carbon films10.1126/science.1102896 ↗
16. Towards wafer-size graphene layers by atmospheric pressure graphitization of SiC(0001)10.1038/nmat2382 ↗
17. Epitaxial graphene on ruthenium10.1038/nmat2166 ↗
18. Large-area synthesis of high-quality and uniform graphene films on copper foils10.1126/science.1171245 ↗
19. Improved synthesis of graphene flakes from the multiple electrochemical exfoliation of graphite rod10.1016/j.nanoen.2012.11.003 ↗
20. Trends in green reduction of graphene oxides, issues and challenges: a review10.1016/j.materresbull.2014.07.051 ↗
21. Preparation of graphitic oxide10.1021/ja01539a017 ↗
22. Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide10.1016/j.carbon.2007.02.034 ↗
23. Thermodynamic and kinetic analysis of low-temperature thermal reduction of graphene oxide10.1007/BF03353652 ↗
24. The green synthesis of reduced graphene oxide by the ethanol-thermal reaction and its electrical properties10.1016/j.matlet.2013.11.081 ↗
25. Separation of the sp3 and sp2 components in the C1s photoemission spectra of amorphous carbon films10.1103/PhysRevB.54.8064 ↗
26. Graphene’s potential in materials science and engineering10.1039/C4RA02817A ↗
27. Raman spectroscopy of graphene and graphite: disorder, electron–phonon coupling, doping and nonadiabatic effects10.1016/j.ssc.2007.03.052 ↗
28. Large intrinsic energy bandgaps in annealed nanotube-derived graphene nanoribbons10.1038/nnano.2010.249 ↗
29. Facile preparation of graphene sheets from synthetic graphite10.1016/j.matlet.2011.12.002 ↗
30. Effect of defects on the intrinsic strength and stiffness of graphene10.1038/ncomms4186 ↗
31. In situRaman spectroscopy and thermal analysis of the formation of nitrogen-doped graphene from urea and graphite oxide10.1039/c3ra42725k ↗
32. Raman spectroscopy of graphene and few layers graphene10.1103/PhysRevLett.97.187401 ↗
33. Synthesis of graphene/metal nanocomposite film with good dispersibility via solvothermal method10.1016/S1452-3981(23)16927-6 ↗
34. A facile preparation route for boron-doped graphene, and its CdTe solar cell application10.1039/C0EE00512F ↗
35. Morphological, vibrational and thermal properties of confined graphene nanosheets in an individual polymeric nanochannel by electrospinning10.4236/graphene.2012.12002 ↗
36. Large reversible capacity of high quality graphene sheets as an anode material for lithium–ion batteries10.1016/j.electacta.2010.02.025 ↗
37. Characterization of graphene oxide reduced through chemical and biological processes
38. Facile and straightforward synthesis of superparamagnetic reduced graphene oxide-Fe3O4 hybrid composite by a solvothermal reaction
39. Benzoin derived reduced graphene oxide (rGO) and its nanocomposite: application in dye removal and peroxidase-like activity10.1039/c3ra44069a ↗
40. Capsules-embedded reduced graphene oxide: synthesis,mechanism and electrical properties10.1039/C2TC00304J ↗
41. Focusing on luminescent graphene quantum dots: current status and future perspectives10.1039/c3nr33849e ↗
42. Band gap engineering of chemical vapor deposited graphene by in situ BN doping10.1021/nn3049158 ↗
43. Mott · 1971
44. Conduction in glasses containing transition metal ions10.1016/0022-3093(68)90002-1 ↗
45. Magnetocapacitance without magnetoelectric coupling10.1063/1.2177543 ↗