Solution-synthesized chevron graphene nanoribbons exfoliated onto H: Si(100)

Adrian Radocea, Tao Sun, Timothy H. Vo, Alexander Sinitskii, Narayana R. Aluru, Joseph W. Lyding

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

There has been tremendous progress in designing and synthesizing graphene nanoribbons (GNRs). The ability to control the width, edge structure, and dopant level with atomic precision has created a large class of accessible electronic landscapes for use in logic applications. One of the major limitations preventing the realization of GNR devices is the difficulty of transferring GNRs onto nonmetallic substrates. In this work, we developed a new approach for clean deposition of solution-synthesized atomically precise chevron GNRs onto H:Si(100) under ultrahigh vacuum. A clean transfer allowed ultrahigh-vacuum scanning tunneling microscopy (STM) to provide high-resolution imaging and spectroscopy and reveal details of the electronic structure of chevron nanoribbons that have not been previously reported. We also demonstrate STM nanomanipulation of GNRs, characterization of multilayer GNR cross-junctions, and STM nanolithography for local depassivation of H:Si(100), which allowed us to probe GNR-Si interactions and revealed a semiconducting-to-metallic transition. The results of STM measurements were shown to be in good agreement with first-principles computational modeling.

Original languageEnglish (US)
Pages (from-to)170-178
Number of pages9
JournalNano Letters
Volume17
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

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Keywords

  • Armchair edges
  • Current imaging tunneling spectroscopy
  • Dry contact transfer
  • Graphene nanoribbons
  • Scanning tunneling spectroscopy
  • Silicon

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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