Spectroscopic and fluorescence properties of silver-dye composite nanoparticles

被引：6

作者：

Laban, B. B. ^{[1
]}

Vodnik, V. ^{[2
]}

Vujacic, A. ^{[2
]}

Sovilj, S. P. ^{[3
]}

Jokic, A. B. ^{[1
]}

Vasic, V. ^{[2
]}

机构：

[1] Sci Univ Pristina, Dept Chem, Kosovska Mitrovica 38220, Serbia

[2] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade, Serbia

[3] Univ Belgrade, Fac Chem, Belgrade 11158, Serbia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2013年 / 87卷 / 13期

关键词：

silver nanoparticles; cyanine dye; J-aggregation; fluorescence; surface coverage; NOBLE-METAL NANOPARTICLES; GOLD NANOPARTICLES; SURFACE-PLASMON; CYANINE DYES; OPTICAL MICROSCOPY; ABSORPTION; ADSORPTION; PARTICLES; EXCITON; MONOLAYER;

D O I：

10.1134/S0036024413130141

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The aim of this work was to investigate the formation of J-aggregates of thiacyanine dye (TC, 5,5'-disulfopropyl-3,3'-dichlorothiacyanine sodium salt) in the presence of 6 nm spherical silver nanoparticles (Ag NPs) using spectrophotometric and fluorescence methods. The formation of J-aggregates was concentration dependent and characterized by the appearance of the new absorption band with the maximum at 481 nm. Spectrophotometric study of J-aggregate formation and time stability suggested that they were formed on the account of monomer form of TC. Moreover, the stability of J-aggregates increased with the lowering AgNPs concentration. The measurements of fluorescence of the NPs-dye assembly clearly indicated that the fluorescence of TC was quenched by Ag NPs on the concentration dependent manner. The spectrophotometric and fluorescence properties of NPs-dye assembly were found to be quantitatively related to the surface coverage of the dye on the Ag NPs.

引用

页码：2219 / 2224

页数：6

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