Atomically precise graphene etch stops for three dimensional integrated systems from two dimensional material heterostructures

Jangyup Son, Junyoung Kwon, Sun Phil Kim, Yinchuan Lv, Jaehyung Yu, Jong Young Lee, Huije Ryu, Kenji Watanabe, Takashi Taniguchi, Rita Garrido-Menacho, Nadya Mason, Elif Ertekin, Pinshane Y. Huang, Gwan Hyoung Lee, Arend M. van der Zande

Research output: Contribution to journalArticle

Abstract

Atomically precise fabrication methods are critical for the development of next-generation technologies. For example, in nanoelectronics based on van der Waals heterostructures, where two-dimensional materials are stacked to form devices with nanometer thicknesses, a major challenge is patterning with atomic precision and individually addressing each molecular layer. Here we demonstrate an atomically thin graphene etch stop for patterning van der Waals heterostructures through the selective etch of two-dimensional materials with xenon difluoride gas. Graphene etch stops enable one-step patterning of sophisticated devices from heterostructures by accessing buried layers and forming one-dimensional contacts. Graphene transistors with fluorinated graphene contacts show a room temperature mobility of 40,000 cm2 V−1 s−1 at carrier density of 4 × 1012 cm−2 and contact resistivity of 80 Ω·μm. We demonstrate the versatility of graphene etch stops with three-dimensionally integrated nanoelectronics with multiple active layers and nanoelectromechanical devices with performance comparable to the state-of-the-art.

Original languageEnglish (US)
Article number3988
JournalNature communications
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Son, J., Kwon, J., Kim, S. P., Lv, Y., Yu, J., Lee, J. Y., Ryu, H., Watanabe, K., Taniguchi, T., Garrido-Menacho, R., Mason, N., Ertekin, E., Huang, P. Y., Lee, G. H., & M. van der Zande, A. (2018). Atomically precise graphene etch stops for three dimensional integrated systems from two dimensional material heterostructures. Nature communications, 9(1), [3988]. https://doi.org/10.1038/s41467-018-06524-3