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

Journal Article · · Nature Communications
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.
Research Organization:
Univ. of Illinois, Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012649
OSTI ID:
1511448
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Nanostructured Architectures for Biomolecular Detection inside and outside the Cell journal December 2019
Tunable Modal Birefringence in a Low‐Loss Van Der Waals Waveguide journal May 2019
Tailoring Surface Properties via Functionalized Hydrofluorinated Graphene Compounds journal August 2019
Etching Techniques in 2D Materials journal May 2019
Two‐dimensional heterostructure promoted infrared photodetection devices journal July 2019
Ultrasoft slip-mediated bending in few-layer graphene journal November 2019
All-2D ReS2 transistors with split gates for logic circuitry journal July 2019
Extraordinary magnetoresistance in encapsulated monolayer graphene devices journal February 2020
Extraordinary magnetoresistance in encapsulated monolayer graphene devices text January 2020

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