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A Force-Engineered Lint Roller for Superclean Graphene.

Luzhao Sun1,2, Li Lin1,3, Zihao Wang3

  • 1Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|September 11, 2019
PubMed
Summary
This summary is machine-generated.

A novel method uses an activated-carbon lint roller to create superclean graphene films, exceeding 99% surface cleanness. This process preserves graphene

Keywords:
clean surfacecontaminantsgrapheneultrahigh mobility

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Area of Science:

  • Materials Science
  • Surface Science
  • Nanotechnology

Background:

  • Surface contamination significantly degrades graphene's intrinsic properties.
  • Large-scale, facile methods for producing clean graphene films are lacking.
  • Graphene's high surface area makes it susceptible to contamination, hindering its use in surface and interface applications.

Purpose of the Study:

  • To develop an efficient postgrowth treatment for producing large-area superclean graphene.
  • To demonstrate a method for selectively removing surface contamination from graphene films.
  • To achieve graphene films with significantly reduced polymer residues for enhanced electronic properties.

Main Methods:

  • A novel postgrowth treatment utilizing an activated-carbon-based lint roller.
  • Selective removal of surface contaminants from as-grown graphene films.
  • Transfer of superclean graphene to dielectric substrates.

Main Results:

  • Achieved a superclean graphene surface with over 99% cleanness.
  • Transferred graphene exhibited significantly reduced polymer residues.
  • Ultrahigh carrier mobility of 500,000 cm² V⁻¹ s⁻¹ and low contact resistance of 118 Ω µm were obtained.

Conclusions:

  • The activated-carbon lint roller method effectively removes graphene contaminants.
  • Superclean graphene enables superior electronic performance in surface and interface applications.
  • This facile method facilitates the production of high-quality graphene for technological advancements.