# Cyano-functionalized Ag-bis-acetylide wires on Ag(110)

## TL;DR

This paper demonstrates a bottom-up method to create highly oriented, thermally stable Ag-acetylide nanowires on Ag(110) surfaces using cyano-functionalized alkynes, advancing nanostructure fabrication techniques.

## Contribution

It introduces a novel orthogonal bifunctionalization strategy with selective functional group recognition for fabricating stable organometallic nanowires on metal surfaces.

## Key findings

- Nanowires form in two enantiomorphic domains with high thermal stability.
- The nanowires retain their structure without converting into graphdiyne chains.
- Surface-sensitive techniques confirm the organometallic character of the nanostructures.

## Abstract

Organometallic nanostructures are promising candidates for applications in optoelectronics, magnetism and catalysis. Our bottom-up approach employs a cyano-functionalized terminal alkyne species (CN-DETP) on the Ag(110) surface to fabricate 2D domains of regularly stacked Ag-acetylide nanowires. We unravel their adsorption properties and give evidence to their organometallic character with the aid of complementary surface-sensitive techniques, i.e. scanning tunneling microscopy, X-ray photoelectron spectroscopy and near-edge X-ray absorption fine-structure spectroscopy. Guided by the anisotropic (110) surface, highly oriented nanowires form in two enantiomorphic domains of regularly stacked trans isomers, whereby the bifunctional design of CN-DETP gives rise to orthogonal bonding motifs. Based on STM imaging, we find high thermal stability of the Ag-bis-acetylide wires, without conversion into graphdiyne chains. Our approach based on orthogonal bifunctionalization and selective functional group recognition extends the toolbox of creating alkyne-based nanostructures at interfaces.