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• W4248511596 abstract "Abstract Lateral heterojunctions of atomically precise graphene nanoribbons (GNRs) hold promise for applications in nanotechnology, yet their charge transport and most of the spectroscopic properties have not been investigated. Here, we synthesize a monolayer of multiple aligned heterojunctions consisting of quasi-metallic and wide-bandgap GNRs, and report characterization by scanning tunneling microscopy, angle-resolved photoemission, Raman spectroscopy, and charge transport. Comprehensive transport measurements as a function of bias and gate voltages, channel length, and temperature reveal that charge transport is dictated by tunneling through the potential barriers formed by wide-bandgap GNR segments. The current-voltage characteristics are in agreement with calculations of tunneling conductance through asymmetric barriers. We fabricate a GNR heterojunctions based sensor and demonstrate greatly improved sensitivity to adsorbates compared to graphene based sensors. This is achieved via a new concept in sensing, namely the modulation of the tunneling barriers by adsorbates." @default.
• W4248511596 created "2022-05-12" @default.
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• W4248511596 date "2020-09-16" @default.
• W4248511596 modified "2023-10-16" @default.
• W4248511596 title "Tunneling current modulation in atomically precise graphene nanoribbon heterojunctions" @default.
• W4248511596 doi "https://doi.org/10.21203/rs.3.rs-74344/v1" @default.
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