April 7 - 11, 2025
Seattle, Washington
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2025 MRS Spring Meeting & Exhibit
EL03.08.12

Long-term Stability of Atomically Precise Graphene Nanoribbon Transistors

When and Where

Apr 9, 2025
5:00pm - 7:00pm
Summit, Level 2, Flex Hall C

Presenter(s)

Co-Author(s)

Shelby Janssen1,Muhammed Yusufoglu1,Kentaro Yumigeta1,Zafer Mutlu1

University of Arizona1

Abstract

Shelby Janssen1,Muhammed Yusufoglu1,Kentaro Yumigeta1,Zafer Mutlu1

University of Arizona1
Transistors must continuously evolve and improve to sustain high performance and energy-efficient computing, especially to meet the energy and performance demanding AI systems. Transistors fabricated with silicon as the dominant channel materials for more than half a century are struggling to keep the pace with these ever-growing requirements, necessitating new transistor channel materials capable of delivering significantly improved performance and energy efficiency compared to silicon.

Bottom-up synthesized atomically precise graphene nanoribbons (GNRs) are a promising a highly promising alternative to silicon for transistor channel materials in next-generation electronic devices. This class of 2D van der Waals materials have a tunable electronic structure and high theoretical mobility. Despite the immense potential, the long-term stability and reliability of GNRs have not been thoroughly investigated over a long time period. This is a crucial step necessary for establishing the foundation for the practical application and large-scale integration of GNR field-effect transistors (GNRFETs). In this work, we studied the long-term stability of GNRs in terms of electrical performance, structural integrity, and surface chemistry. We fabricated short channel field effect transistors (FETs) using bottom-up synthesized 9-atom wide armchair GNRs (9-AGNRs) with a local backgate geometry. We comprehensively characterized the GNRs and the FET devices through electrical transport measurements, Raman spectroscopy (wavelength of 785 nm), and atomic force microscopy (AFM) ) to determine the performance and stability of GNRs over several months in air. We will discuss potential improvements in device performance and long-term stability.

Keywords

2D materials | nanostructure

Symposium Organizers

Eli Sutter, University of Nebraska--Lincoln
Luca Camilli, University of Rome Tor Vergata
Mads Brandbyge, Technical University of Denmark
José Manuel Caridad Hernández, Universidad de Salamanca

Session Chairs

Mads Brandbyge
Luca Camilli

In this Session