Raman and scanning tunneling spectroscopic investigations on graphene-silver nanocomposites
Source abstract
Abstract
Graphene-silver (G-Ag) nanocomposites were prepared using liquid phase exfoliation of graphite flakes followed by a reduction of silver nitrate. The plasmonic characteristics of these nanocomposites are highly sensitive to the Ag concentration in the films. Raman spectroscopic investigations indicated that the effect of the surface-enhanced Raman scattering is present significantly in the Raman spectra of G-Ag nanocomposites. The intensity of the D, G, and 2D Raman bands is found to increase with silver concentration. The interaction between graphene and silver nanoparticles causes the G-band to split depending on the concentration of Ag. Scanning tunneling spectroscopic investigations showed that silver causes the Fermi level of graphene to shift towards the conduction band indicating the n-type doping and interestingly the existence of an offset current in the I-V characteristics of G-Ag nanocomposites differing from the zero value observed for graphene.
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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 (42)
Show source-provided references
1. Electric field effect in atomically thin carbon films10.1126/science.1102896 ↗
2. Graphene-based materials: synthesis, characterization, properties, and applications10.1002/smll.201002009 ↗
3. Chemical stability of graphene coated silver substrates for surface-enhanced Raman scattering10.1038/s41598-017-14782-2 ↗
4. Exfoliated graphene separated by platinum nanoparticles10.1021/cm801356a ↗
5. Graphene and nanostructured MnO2 composite electrodes for supercapacitors10.1016/j.carbon.2011.02.068 ↗
6. Nonlinear optical properties of covalently linked graphene-metal porphyrin composite materials10.1063/1.3553500 ↗
7. A self-assembled Ag nanoparticle agglomeration process on graphene for enhanced light output in GaN-based LEDs10.1088/0957-4484/23/25/255201 ↗
8. Density functional study of alkali-metal atoms and monolayers on graphite (0001)10.1103/PhysRevB.75.075401 ↗
9. Raman spectroscopy as a versatile tool for studying the properties of graphene10.1038/nnano.2013.46 ↗
10. A facile one-pot method to high-quality Ag-graphene composite nanosheets for efficient surface-enhanced Raman scattering10.1039/c1cc11125f ↗
11. Gold on graphene as a substrate for surface enhanced Raman scattering study
12. Surface enhanced Raman spectroscopy on a flat graphene surface10.1073/pnas.1205478109 ↗
13. Silver nanoparticles protected by monolayer graphene as a stabilized substrate for surface enhanced Raman spectroscopy10.1016/j.carbon.2013.09.076 ↗
14. Effect of oxidation on surface-enhanced Raman scattering activity of silver nanoparticles: a quantitative correlation10.1021/ac2005839 ↗
15. Environmentally friendly synthesis of graphene–silver composites with surface-enhanced Raman scattering and antibacterial activity via reduction with L-ascorbic acid/water vapor10.1039/C5NJ00414D ↗
16. One-pot photochemical synthesis of graphene composites uniformly deposited with silver nanoparticles and their high catalytic activity towards the reduction of 2-nitroaniline10.1039/c2jm16455h ↗
17. Microwave-assisted rapid synthesis of Ag nanoparticles/graphene nanosheet composites and their application for hydrogen peroxide detection10.1007/s11051-011-0410-3 ↗
18. Ag/AgBr/graphene oxide nanocomposite synthesized via oil/water and water/oil microemulsions: a comparison of sunlight energized plasmonic photocatalytic activity10.1021/la204452p ↗
19. One-pot facile decoration of graphene nanosheets with Ag nanoparticles for electrochemical oxidation of methanol in alkaline solution10.1016/j.elecom.2012.01.027 ↗
20. Preparation and capacitance performance of Ag – graphene based nanocomposite10.1016/j.jpowsour.2011.11.026 ↗
21. Interaction between metal and graphene: graphene10.1021/nn103004c ↗
22. Liquid phase exfoliated graphene for electronic applications10.1088/2053-1591/aa8586 ↗
23. High-concentration aqueous dispersions of graphene using nonionic, biocompatible block copolymers10.1021/jz2003556 ↗
24. Studies on surface plasmon resonance and photoluminescence of silver nanoparticles10.1016/j.saa.2007.12.002 ↗
25. Synthesis and characterization of silver nanoparticle and graphene oxide nanosheet composites as a bactericidal agent for water disinfection10.1016/j.jcis.2011.05.009 ↗
26. Raman spectrum of graphite10.1063/1.1674108 ↗
27. High-concentration, surfactant-stabilized graphene dispersions10.1021/nn1005304 ↗
28. Synthesis of graphene layers using graphite dispersion in aqueous surfactant solutions10.3938/jkps.58.938 ↗
29. Great surface-enhanced Raman scattering in hybrids consisting of graphene and silver nanoparticles with large particle sizes10.1063/1.4921796 ↗
30. Surface-enhanced Raman scattering of single- and few-layer graphene by the deposition of gold nanoparticles10.1002/chem.201002027 ↗
31. Charge transfer chemical doping of few layer graphenes: charge distribution and band gap formation10.1021/nl902362q ↗
32. Effects of charge transfer interaction of graphene with electron donor and acceptor molecules examined using Raman spectroscopy and cognate techniques10.1088/0953-8984/20/47/472204 ↗
33. Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor10.1038/nnano.2008.67 ↗
34. Breakdown of the adiabatic Born-Oppenheimer approximation in graphene10.1038/nmat1846 ↗
35. Raman fingerprint of charged impurities in graphene10.1063/1.2818692 ↗
36. Symmetry breaking of graphene monolayers by molecular decoration10.1103/PhysRevLett.102.135501 ↗
37. Doping graphene with metal contacts10.1103/PhysRevLett.101.026803 ↗
38. Electron and phonon properties of graphene: their relationship with carbon nanotubes10.1007/978-3-540-72865-8_21 ↗
39. Detection of surface plasmons by scanning tunneling microscopy10.1116/1.585557 ↗
40. Scanning tunneling spectroscopy of high-temperature superconductors10.1103/RevModPhys.79.353 ↗
41. Plasmon-induced tunneling currents: the influence of tip modes
42. Ag/graphene heterostructures: synthesis, characterization and optical10.1002/ejic.200901048 ↗