Fluorescent polyelectrolyte capped silver nanoclusters: Optimization and spectroscopic evaluation

Autor:	Erling Thyrhaug, Tanya Shtoyko, Dimytro Shumilov, Ignacy Gryczynski, Irina Akopova, Ryan Rich, Zygmunt Gryczynski, Sangram Raut
Rok vydání:	2012
Předmět:	genetic structures Chemistry Analytical chemistry General Physics and Astronomy Fluorescence correlation spectroscopy Nanotechnology Fluorescence Article Polyelectrolyte Nanoclusters Wavelength Picosecond Physical and Theoretical Chemistry Excitation Fluorescence anisotropy
Zdroj:	Chemical Physics Letters. 549:72-76
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2012.08.042
Popis:	In the present work, 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 for 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e33651eb1a488bc81453641ded20562b https://doi.org/10.1016/j.cplett.2012.08.042 Zobrazit plný text záznamu Full Text from ScienceDirect