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

doi:10.1016/j.cplett.2012.08.042

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

Department of Chemistry

7 Citations (Scopus)

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 language	English
Journal	Chemical Physics Letters
Volume	549
Pages (from-to)	72-76
Number of pages	5
ISSN	0009-2614
DOIs	https://doi.org/10.1016/j.cplett.2012.08.042
Publication status	Published - 11 Oct 2012

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10.1016/j.cplett.2012.08.042

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title = "Fluorescent polyelectrolyte capped silver nanoclusters: optimization and spectroscopic evaluation",

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.",

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

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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

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.

U2 - 10.1016/j.cplett.2012.08.042

DO - 10.1016/j.cplett.2012.08.042

M3 - Journal article

C2 - 23772092

SN - 0009-2614

VL - 549

SP - 72

EP - 76

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Fluorescent polyelectrolyte capped silver nanoclusters: optimization and spectroscopic evaluation

Abstract

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