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  • Zaman, QuaidPontificia Univ Catolica Rio de Janeiro, Brazil; Univ Buner, Pakistan (author)

Water Diffusion Effectsat Gold-Graphene Interfaces Supporting Surface Plasmon Polaritons

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-08-03
  • AMER CHEMICAL SOC,2022
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-187729
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-187729URI
  • https://doi.org/10.1021/acs.jpcc.2c02841DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior -Brasil (CAPES) [001]; FAPERJ [E-26/010.100622/2018, E-26/010.001646/2019, E-26/010.002138/2019, E-26/010.000980/2019, E-26/202.357/ 2019, E-26/211.540/2021]; Instituto Nacional de Engenharia de Superficies (INCT-INES) [423349/2018-0, 465423/2014-0]; Angpan-nefoereningens Forskningsstiftelse [21-112]; Swedish Research Council [2018-05973]; AIRC [24381]
  • We present a detailed investigation on the effects of water diffusion at the different interfaces of gold-graphene plasmonic sensors on the propagation of the supported surface plasmon polaritons (SPPs). The substrate/metal interfacial chemical reactions are investigated by monitoring the full width at half-maximum of the SPR reflectivity curve. Although protection by single-layer graphene (SLG) grown by chemical vapor deposition inhibits the chemical reactions happening at the metal-dielectric interfaces, SPR experimental results confirm that water diffusion paths through the borders of graphene domains are still present into the plasmonic sensors. Density functional theory calculations show that the doping level of SLG after the transfer on gold as well as interfacial charge transfer can be tuned in the presence of water molecules. On these bases, we propose a simplified effective medium approach for heterogeneous metal-carbon interfaces, where the interaction between the surface atomic layers of the gold thin film, water molecules, and the SLG induces the creation of an extended charge density difference region crossing the Au/H2O/SLG/H2O heterointerface. The latter is modeled as an ultrathin effective medium with a thickness and extraordinary optical susceptivity and conductivity that are different from those of the free-standing graphene. In this context, the extraordinary refractive index and thickness of the graphene-gold effective medium are measured in the near-infrared on the low-damping SPR platforms by applying the two-medium SPR method. The results are coherent with graphene n-doping in water environment, showing that the optically excited electrons along the extraordinary axis have a substantial bonding character and that the enhancement of the sensitivity of the gold-graphene plasmonic sensors is not related to a shift in the plasma frequency of the metal layer but to the changes in the extraordinary polarizability of graphene. The research highlights the importance of the SLG-substrate and SLG-environment interactions in graphene-protected plasmonics and optoelectronics.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Freire, Fernando Lazaro Jr.Pontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Shtepliuk, Ivan I.,1987-Linköpings universitet,Halvledarmaterial,Tekniska fakulteten(Swepub:liu)ivash69 (author)
  • Barbosa, Andre N.Pontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • da Costa, Marcelo E. H. MaiaPontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Diaz Mendoza, Cesar AugustoPontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Araujo, Jefferson F. D. F.Pontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Concas, Guilherme C.Pontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Cremona, MarcoPontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Ahmed, ZubairPontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Pandoli, Omar GinoblePontificia Univ Catolica Rio de Janeiro, Brazil; Univ Genoa, Italy (author)
  • Aucelio, Ricardo Q.Pontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Dmitriev, VictorFed Univ Para, Brazil (author)
  • da Costa, Karlo Q.Fed Univ Para, Brazil (author)
  • Cruz, Andre Felipe S.Fed Univ Para, Brazil (author)
  • Fibbi, GabriellaUniv Florence, Italy (author)
  • Laurenzana, AnnaUniv Florence, Italy (author)
  • Margheri, FrancescaUniv Florence, Italy (author)
  • Chilla, AnastasiaUniv Florence, Italy (author)
  • Scavone, FrancescaUniv Florence, Italy (author)
  • Frediani, ElenaUniv Florence, Italy (author)
  • Khan, RajwaliUniv Lakki Marwat, Pakistan (author)
  • Daldosso, NicolaUniv Verona, Italy (author)
  • Chiste, ElenaUniv Verona, Italy (author)
  • Mariotto, GinoUniv Verona, Italy (author)
  • Santos, Evelyn C. S.Brazilian Ctr Res Phys CBPF, Brazil (author)
  • Del Rosso, TommasoPontificia Univ Catolica Rio de Janeiro, Brazil (author)
  • Pontificia Univ Catolica Rio de Janeiro, Brazil; Univ Buner, PakistanPontificia Univ Catolica Rio de Janeiro, Brazil (creator_code:org_t)

Related titles

  • In:The Journal of Physical Chemistry C: AMER CHEMICAL SOC126:32, s. 13905-139191932-74471932-7455

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