Elucidating the Mystery of DNA-Templating Effects on a Silver Nanocluster

Zacharias Liasi, Andreas Erbs Hillers-Bendtsen, Lasse Jensen, Kurt V. Mikkelsen

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This presentation considers the effects that DNA-templating has on the optical properties of a 16-atom silver cluster. To accomplish this, hybrid quantum mechanical and molecular mechanical simulations of a Ag16-DNA complex have been carried out and compared with pure time-dependent density functional theory calculations of two Ag16 clusters in vacuum. The presented results show that the templating DNA polymers both red-shift the one-photon absorption of the silver cluster and increase its intensity. This occurs through a change in cluster shape prompted by the structural constraints of the DNA ligands combined with silver-DNA interactions. The overall charge of the cluster also contributes to the observed optical response, as oxidation of the cluster results in a simultaneous blue-shift of the one-photon absorption and a decrease in intensity. Additionally, the changes in shape and environment also lead to a blue-shift and enhancement of the two-photon absorption.

Original languageEnglish (US)
Pages (from-to)5727-5733
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume14
Issue number25
DOIs
StatePublished - Jun 29 2023

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Physical and Theoretical Chemistry

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