TY - JOUR
T1 - Fluorescent polyelectrolyte capped silver nanoclusters
T2 - Optimization and spectroscopic evaluation
AU - Raut, Sangram
AU - Rich, Ryan
AU - Akopova, Irina
AU - Thyrhaug, Erling
AU - Shtoyko, Tanya
AU - Shumilov, Dimytro
AU - Gryczynski, Zygmunt
AU - Gryczynski, Ignacy
N1 - Funding Information:
This Letter was supported by the NIH GRANT R01EB12003. We would like to thank Dr. Badri Maliwal for helpful discussions.
PY - 2012/10/11
Y1 - 2012/10/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84866732696&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2012.08.042
DO - 10.1016/j.cplett.2012.08.042
M3 - Article
AN - SCOPUS:84866732696
SN - 0009-2614
VL - 549
SP - 72
EP - 76
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -