Mr. Dipankar Bain Profile

Dipankar Bain

at Indian Association for the Cultivation of Science

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Proceedings Article | 23 February 2018 Presentation + Paper

Nano-bio assemblies for artificial light harvesting systems

Dipankar Bain, Subarna Maity, Amitava Patra

Proceedings Volume 10507, 105070C (2018) https://doi.org/10.1117/12.2287324

KEYWORDS: Gold, Energy transfer, Silver, Ions, Metals, Light harvesting, Energy efficiency, Absorption, Carbon, Nanolithography

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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.

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