Nanogap based graphene coated AFM tips with high spatial resolution, conductivity and durability

Mario Lanza, Teng Gao, Zixuan Yin, Yanfeng Zhang, Zhongfan Liu, Yuzhen Tong, Ziyong Shen, Huiling Duan

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

After one decade of analyzing the intrinsic properties of graphene, interest into the development of graphene-based devices and micro electromechanical systems is increasing. Here, we fabricate graphene-coated atomic force microscope tips by growing the graphene on copper foil and transferring it onto the apex of a commercially available AFM tip. The resulting tip exhibits surprising enhanced resolution in nanoscale electrical measurements. By means of topographic AFM maps and statistical analyses we determine that this superior performance may be related to the presence of a nanogap between the graphene and the tip apex, which reduces the tip radius and tip-sample contact area. In addition, the graphene-coated tips show a low tip-sample interaction, high conductivity and long life times. The novel fabrication-friendly tip could improve the quality and reliability of AFM experiments, while reducing the cost of AFM-based research. © 2013 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)10816-10823
Number of pages8
JournalNanoscale
Volume5
Issue number22
DOIs
StatePublished - Nov 21 2013
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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