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Control over the charge transfer in dye-nanoparticle decorated graphene

Control over the charge transfer in dye-nanoparticle decorated graphene
Control over the charge transfer in dye-nanoparticle decorated graphene

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.

0009-2614
176-182
Bongu, Sudhakara Reddy
0570d0c3-f0f8-42fe-afde-ab736b47bdb0
Veluthandath, Aneesh V.
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Nanda, B. R.K.
0d9ecf3d-f7c5-4ab5-89e9-57a764d85c87
Ramaprabhu, Sundara
2253a98c-9bd5-46d7-8ac1-25dadd9ed10d
Bisht, Prem B.
9e617371-071b-48b1-9f33-2801ea08cace
Bongu, Sudhakara Reddy
0570d0c3-f0f8-42fe-afde-ab736b47bdb0
Veluthandath, Aneesh V.
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Nanda, B. R.K.
0d9ecf3d-f7c5-4ab5-89e9-57a764d85c87
Ramaprabhu, Sundara
2253a98c-9bd5-46d7-8ac1-25dadd9ed10d
Bisht, Prem B.
9e617371-071b-48b1-9f33-2801ea08cace

Bongu, Sudhakara Reddy, Veluthandath, Aneesh V., Nanda, B. R.K., Ramaprabhu, Sundara and Bisht, Prem B. (2016) Control over the charge transfer in dye-nanoparticle decorated graphene. Chemical Physics Letters, 644, 176-182. (doi:10.1016/j.cplett.2015.12.023).

Record type: Article

Abstract

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.

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More information

Accepted/In Press date: 9 December 2015
e-pub ahead of print date: 17 December 2015
Published date: 16 January 2016
Learn more about Zepler Institute for Photonics and Nanoelectronics research

Identifiers

Local EPrints ID: 444636
URI: http://eprints.soton.ac.uk/id/eprint/444636
DOI: doi:10.1016/j.cplett.2015.12.023
ISSN: 0009-2614
PURE UUID: 8ce9b4a0-6742-42f3-9d7c-4d5c5ebe8457
ORCID for Aneesh V. Veluthandath: ORCID iD orcid.org/0000-0003-4306-6723

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Date deposited: 28 Oct 2020 17:30
Last modified: 06 Jun 2024 02:07

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Contributors

Author: Sudhakara Reddy Bongu
Author: Aneesh V. Veluthandath ORCID iD
Author: B. R.K. Nanda
Author: Sundara Ramaprabhu
Author: Prem B. Bisht

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