The study of interaction between graphene and metals by Raman spectroscopy

Wang, W. X.; Liang, Shuangshuang; Yu, Ting; Li, D. H.; Li, Y. B.; Han, Xu

doi:10.1063/1.3536670

Cited by 116 publications

(103 citation statements)

References 21 publications

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“…Our observations are very similar to those reported by Wang et al [ 40 ] for graphene transferred to gold and silver. While the G-band shift of approximately 4 cm −1 is similar to that observed by other authors resulting from charge transfer from graphene to silver NPs, [ 41 ] the blue-shift of the 2D peak is relatively larger than the G peak and indicates that mechanical strain induced by the non conformal covering of graphene to the structured Ag is present.…”

Section: Evidences For Silver Deoxidation and Electronsupporting

confidence: 95%

Graphene as an Electron Shuttle for Silver Deoxidation: Removing a Key Barrier to Plasmonics and Metamaterials for SERS in the Visible

Losurdo

Bergmair

Dastmalchi

et al. 2013

Adv Funct Materials

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The role of graphene in enabling deoxidation of silver nanostructures, thereby contributing to enhance plasmonic properties and to improve the temporal stability of graphene/silver hybrids for both general plasmonic and meta‐materials applications, as well as for surface enhanced Raman scattering (SERS) substrates, is demonstrated. The chemical mechanism occurring at the graphene–silver oxide interface is based on the reduction of silver oxide triggered by graphene that acts as a shuttle of electrons and as a kind of catalyst in the deoxidation. A mechanism is formulated, combining elements of electron transfer, role of defects in graphene, and electrochemical potentials of graphene, silver, and oxygen. Therefore, the formulated model represents a step forward from the simple view of graphene as barrier to oxygen diffusion proposed so far in literature. Single layer graphene grown by chemical vapor deposition is transferred onto silver thin films, a periodic silver fishnet structure fabricated by nanoimprint lithography, and onto silver nanoparticle ensembles supporting a localized surface plasmon resonance in the visible range. Through the study of these nanostructured graphene/Ag hybrids, the effectiveness of graphene in preventing and reducing oxidation of silver plasmonic structures, keeping silver in a metallic state over months at air exposure, is demonstrated. The enhanced and stable plasmonic properties of the silver‐fishnet/graphene hybrids are evaluated through their SERS response for detecting benzyl mercaptane.

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Section: Evidences For Silver Deoxidation and Electronsupporting

confidence: 95%

Graphene as an Electron Shuttle for Silver Deoxidation: Removing a Key Barrier to Plasmonics and Metamaterials for SERS in the Visible

Losurdo

Bergmair

Dastmalchi

et al. 2013

Adv Funct Materials

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show abstract

“…5 The ID/IG ratio increases from 0.19 in graphite to 0.90 in GO as a result of the defects caused by oxygen-containing groups introduced during the oxidation treatment. Such a higher ratio of D peak and G peak in Pt/CoSi-graphene (1.21) is attributable to the decrease in the average size of the sp 2 domains upon the formation of nanoparticles on the graphene and the reduction of the exfoliated graphene [27,28] It is known that the electrochemically active surface area (EASAs) of Pt particles provides one of the most important parameters to determine the catalytic activity. CV is a convenient and efficient tool to estimate EASAs on an electrode, which can not only provide the electrochemically active sites of the catalyst, but also compare the difference between catalysts.…”

Section: Resultsmentioning

confidence: 99%

Preparation of cobalt silicide on graphene as Pt electrocatalyst supports for highly efficient and stable methanol oxidation in acidic media

Zhang

Yan

et al. 2015

Electrochimica Acta

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“…The measurements were also performed on bare graphene and bare gold substrates (deposited through E-beam evaporation), resulting in WFs of 4.75 ± 0.05 eV and 5.1 ± 0.05 eV, respectively, which are within the range reported in the literature. [ 25,26,29,37 ] Figure 3 c shows the changes in the WF of graphene by Au and PEIE layer. As expected, charge transfer at the Au-graphene interface causes p-doping in the graphene sheet due to differences in their WFs resulting in a WF of 4.9 ± 0.1 for Au/graphene.…”

Section: Work Function Measurementsmentioning

confidence: 98%

Formation of Air Stable Graphene p–n–p Junctions Using an Amine‐Containing Polymer Coating

Sojoudi

Baltazar

Tolbert

et al. 2014

Adv Materials Inter

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An ultrathin layer of a polymer containing simple aliphatic amine groups, polyethylenimine ethoxylated (PEIE), is deposited on a back‐gated field effect graphene device to form graphene p–n–p junctions. Characteristic I–V curves indicate the superposition of two separate Dirac points, which confirms an energy separation of neutrality points within the complementary regions. This is a simple approach for making graphene p–n–p junctions without a need for multiple lithography steps or electrostatic gates and, unlike, the destructive techniques such as substitutional doping or covalent functionalization, it induces a minor defect, if any, as there is no discernible D peak in the Raman spectra of the graphene films after creating junctions and degradation in the charge carrier mobilities of the graphene devices. This method can be easily processed from dilute solutions in environmentally‐friendly solvents such as water or methoxyethanol and does not suffer any change upon exposure to air or heating at temperatures below 100 °C.

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The study of interaction between graphene and metals by Raman spectroscopy

Cited by 116 publications

References 21 publications

Graphene as an Electron Shuttle for Silver Deoxidation: Removing a Key Barrier to Plasmonics and Metamaterials for SERS in the Visible

Graphene as an Electron Shuttle for Silver Deoxidation: Removing a Key Barrier to Plasmonics and Metamaterials for SERS in the Visible

Preparation of cobalt silicide on graphene as Pt electrocatalyst supports for highly efficient and stable methanol oxidation in acidic media

Formation of Air Stable Graphene p–n–p Junctions Using an Amine‐Containing Polymer Coating

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