Control over the charge transfer in dye-nanoparticle decorated graphene

被引：5
|
作者：
Bongu, Sudhakara Reddy [1 ]
Veluthandath, Aneesh V. [1 ]
Nanda, B. R. K. [1 ]
Ramaprabhu, Sundara [1 ]
Bisht, Prem B. [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Chennai 600036, Tamil Nadu, India
来源：
CHEMICAL PHYSICS LETTERS | 2016年 / 644卷
关键词：
FLUORESCENCE; PARTICLES; COMPLEX;
D O I：
10.1016/j.cplett.2015.12.023
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：
Charge transfer interaction between silver decorated graphene and three differently charged dyes, cationic (rhodamine 6G), neutral (rhodamine B) and anionic (fluorescein 27) has been studied. The ground state association constants have been evaluated and changes in the fluorescence intensity and lifetimes have been obtained in two solvents. Strength of complex-formation has been found to be higher with the cationic molecule in water. In a higher viscosity solvent, the ground state complex formation is restricted. Local field of localized surface plasmons of nanoparticles adsorbed on the graphene sheets leads to enhanced absorption and fluorescence of fluorescein 27. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：176 / 182
页数：7
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