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Proceedings Paper

Nano-bio assemblies for artificial light harvesting systems
Author(s): Dipankar Bain; Subarna Maity; Amitava Patra
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Paper Abstract

Ultrasmall fluorescent gold nanoclusters (Au NCs) have drawn considerable research interest owing to their molecular like properties such as d-sp and sp-sp transitions, and intense fluorescence. Fluorescent Au NCs have especial attraction in biological system owing to their biocompatibility and high photostability. Recently, several strategies have been adapted to design an artificial light-harvesting system using Au NCs for potential applications. Here, we have designed Au nanoclusters based dsDNA (double stranded deoxyribonucleic acid) nano assemblies where the Au nanocluster is covalently attached with Alexa Fluor 488 (A488) dye tagged dsDNA. Investigation reveals that the incorporation of Ag+ into dsDNA enhances the rate of energy transfer from A488 to Au NCs. In addition cadmium telluride quantum dot (CdTe QDs) based Au NCs hybrid material shows the significant enhancement of energy transfer 35% to 83% with changing the capping ligand of Au NCs from glutathione (GSH) to bovine serum albumin (BSA) protein. Another hybrid system is developed using carbon dots and dye encapsulated BSA-protein capped Au NCs for efficient light harvesting system with 83% energy transfer efficiency. Thus, Au NCs base nano bio assemblies may open up new possibilities for the construction of artificial light harvesting system.

Paper Details

Date Published: 23 February 2018
PDF: 14 pages
Proc. SPIE 10507, Colloidal Nanoparticles for Biomedical Applications XIII, 105070C (23 February 2018);
Show Author Affiliations
Dipankar Bain, Indian Association for the Cultivation of Science (India)
Subarna Maity, Indian Association for the Cultivation of Science (India)
Amitava Patra, Indian Association for the Cultivation of Science (India)

Published in SPIE Proceedings Vol. 10507:
Colloidal Nanoparticles for Biomedical Applications XIII
Marek Osiński; Wolfgang J. Parak; Xing-Jie Liang, Editor(s)

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