Transfer of Substitutionally Implanted Graphene.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Ultralow energy (ULE) ion implantation enables substitutional doping of graphene with transition metals.
• Nonsubstitutional incorporation of dopants during ULE implantation can negatively impact graphene's electronic properties.
• Effective methods are needed to remove nonsubstitutional dopants for reliable graphene applications.

Purpose of the Study:

• To demonstrate a method for transferring substitutionally doped graphene prepared by ULE ion implantation.
• To preserve substitutional dopants while removing nonsubstitutional ones during the transfer process.
• To maintain the structural and electronic integrity of doped graphene for further integration.

Main Methods:

• Graphene doped with manganese (Mn) via ULE ion implantation.
• Standard wet transfer process for graphene.
• Characterization using X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning tunneling microscopy (STM), and angle-resolved photoemission spectroscopy (ARPES).

Main Results:

• Successful transfer of Mn-doped graphene using a wet transfer method.
• Preservation of substitutional Mn and removal of nonsubstitutional Mn from the surface.
• Retention of the characteristic Dirac band structure in the transferred Mn-doped graphene.
• Demonstrated feasibility of surface-sensitive characterization and device integration.

Conclusions:

• A practical method for transferring substitutionally doped graphene while maintaining its integrity has been developed.
• This technique facilitates the study of ULE ion-implanted graphene by eliminating complications from nonsubstitutional components.
• The method enables the integration of doped graphene into complex material structures and device architectures.