Adsorption, Single-Molecule Manipulation, and Self-Assembly of Borazine on Ag(111)

Tobias Weiss, Aleksandr Baklanov, Georg S. Michelitsch, Karsten Reuter, Martin Schwarz, Manuela Garnica, Willi Auwärter

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The interaction of borazine with metal supports and the concomitant surface chemistry play important roles in the synthesis of hexagonal boron nitride and the assembly of BN-doped carbon nanostructures, thus making adsorbed borazine an intriguing model system. Herein, the first real space characterization of individual borazine molecules and highly ordered borazine self-assemblies on solid supports, combining scanning tunneling microscopy (STM), scanning tunneling spectroscopy, X-ray photoelectron spectroscopy, and complementary density functional theory modeling is reported. Specifically, a weak, nondissociative adsorption of borazine with the ring aligned in parallel to the surface plane is observed on Ag(111) upon low temperature deposition. Borazine is found to favor hollow adsorption sites, which guide the assembly of intricate borazine assemblies including a porous, chiral honeycomb-like network, and dense-packed monolayer films. Additionally, a modification of the borazine adsorption configuration by STM-based manipulation is demonstrated. Dehydrogenation of individual molecules by voltages pulses yields an upright standing borazine fragment bound via B to Ag. This study thus provides a comprehensive, single-molecule level characterization of borazine adsorption and surface chemistry on a characteristic coinage metal support and may serve as a reference for advanced low-dimensional materials based on functionalized borazines or including BN units as dopants.

Original languageEnglish
Article number2300774
JournalAdvanced Materials Interfaces
Volume11
Issue number4
DOIs
StatePublished - 2 Feb 2024

Keywords

  • Ag(111)
  • adsorption
  • borazine
  • dehydrogenation
  • scanning tunneling microscopy
  • scanning tunneling spectroscopy
  • self-assembly

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