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Area of Science:

  • Materials Science
  • Electrochemistry
  • Surface Science

Background:

  • Epitaxial graphene on silicon carbide (Gr/SiC) is a promising material for electrochemical applications.
  • Understanding metal deposition on Gr/SiC is crucial for developing advanced sensors and coatings.

Purpose of the Study:

  • To investigate the electrochemical deposition of lead (Pb) on Gr/SiC.
  • To elucidate the nucleation kinetics and morphology of Pb deposits.
  • To explore the interaction between Pb and the Gr/SiC interface.

Main Methods:

  • Electrochemical deposition and current transient analysis.
  • Raman spectroscopy and scanning electron microscopy (SEM).
  • First principles calculations.

Main Results:

  • Instantaneous nucleation mechanism controlled by convergent mass transport was observed.
  • Pb deposition kinetics and morphology were characterized.
  • Calculations showed Pb nucleation weakens metal-graphene interaction, with adatoms influencing graphene's vibrational properties.

Conclusions:

  • The study provides insights into lead electrodeposition on Gr/SiC.
  • Findings are relevant for designing heavy metal ion electrochemical sensors.
  • Results contribute to understanding metal electroplating on graphene interfaces.