Structural properties of azobenzene self-assembled monolayers by atomistic simulations

Silvio Pipolo, Enrico Benassi, Stefano Corni

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Azobenzene self-assembled monolayers (SAMs) are examples of optomechanical nanostructures capable of producing mechanical work through the well-known azobenzene photoisomerization process. Experimental studies have provided information on their structural properties, but an atomistic description of the SAMs in both the cis and trans forms is still lacking. In this work, a computational investigation of the SAM structures is conducted by classical molecular dynamics with a dedicated force. Experimental data on the SAM unit cell is used to set up SAM models of different molecular densities. The optimal structures are identified through the comparison with structural data from X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopies. The resulting SAM atomistic models are validated by comparing simulated and experimental scanning tunneling microscopy images.

Original languageEnglish
Pages (from-to)10505-10512
Number of pages8
JournalLangmuir
Volume29
Issue number33
DOIs
Publication statusPublished - 20 Aug 2013
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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