Fluorescent polyelectrolyte capped silver nanoclusters: Optimization and spectroscopic evaluation

Sangram Raut, Ryan Rich, Irina Akopova, Erling Thyrhaug, Tanya Shtoyko, Dimytro Shumilov, Zygmunt Gryczynski, Ignacy Gryczynski

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

In the present Letter, we have synthesized water soluble Ag nanoclusters using PMAA as a template with different Ag +:COO - ratios, to optimize it for highest brightness using less UV exposure time. Fluorescence polarization was 0.30 and was found to vary with excitation and emission wavelength with few hundred picoseconds average fluorescence lifetime. Fluorescence correlation spectroscopy data depicts slower diffusion at red excitation compared to blue excitation in confocal volume than conventionally synthesized colloids proving presence of multiple sizes. The optical properties of the particles are dependent upon the excitation wavelength used and the emission wavelength collected.

Original languageEnglish
Pages (from-to)72-76
Number of pages5
JournalChemical Physics Letters
Volume549
DOIs
StatePublished - 11 Oct 2012

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