Excited-State Dynamics in a DNA-Stabilized Ag16 Cluster with Near-Infrared Emission

Junsheng Chen, Ajeet Kumar, Cecilia Cerretani, Tom Vosch, Donatas Zigmantas, Erling Thyrhaug

Research output: Contribution to journalArticlepeer-review

Abstract

Due to desirable optical properties, such as efficient luminescence and large Stokes shift, DNA-templated silver nanoclusters (DNA-AgNCs) have received significant attention over the past decade. Nevertheless, the excited-state dynamics of these systems are poorly understood, as studies of the processes ultimately leading to a fluorescent state are scarce. Here we investigate the early time relaxation dynamics of a 16-atom silver cluster (DNA-Ag16NC) featuring NIR emission in combination with an unusually large Stokes shift of over 5000 cm-1. We follow the photoinduced dynamics of DNA-Ag16NC on time ranges from tens of femtoseconds to nanoseconds using a combination of ultrafast optical spectroscopies, and extract a kinetic model to clarify the physical picture of the photoinduced dynamics. We expect the obtained model to contribute to guiding research efforts toward elucidating the electronic structure and dynamics of these novel objects and their potential applications in fluorescence-based labeling, imaging, and sensing.

Original languageEnglish
Pages (from-to)4078-4083
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume14
Issue number17
DOIs
Publication statusPublished - 2023 May 4

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

Fingerprint

Dive into the research topics of 'Excited-State Dynamics in a DNA-Stabilized Ag16 Cluster with Near-Infrared Emission'. Together they form a unique fingerprint.

Cite this