Staff View: Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells

Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells

DNA templated gold wires (AuWs) were fabricated on Pt sputtered ITO (Pt/ITO) substrates using ‘scribing’ or ‘writing’ method to be used as a modified counter electrode (CE) in Dye sensitized solar cells. The gold nanoparticles (AuNPs) bind to DNA in aqueous solution due to the polyanionic nature of...

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Main Authors:	Shakir, Sehar, Foo, Yiing Yee, Rizan, Nastaran, Abd-ur-Rehman, Hafiz M., Yunus, Kamran, Phang, Siew Moi, Periasamy, Vengadesh
Format:	Article
Published:	Springer 2018
Subjects:	Q Science (General) QC Physics QH Natural history
Online Access:	http://eprints.um.edu.my/20713/ https://doi.org/10.1007/s10854-017-8411-3
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spelling	my.um.eprints.207132019-03-18T03:53:12Z http://eprints.um.edu.my/20713/ Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells Shakir, Sehar Foo, Yiing Yee Rizan, Nastaran Abd-ur-Rehman, Hafiz M. Yunus, Kamran Phang, Siew Moi Periasamy, Vengadesh Q Science (General) QC Physics QH Natural history DNA templated gold wires (AuWs) were fabricated on Pt sputtered ITO (Pt/ITO) substrates using ‘scribing’ or ‘writing’ method to be used as a modified counter electrode (CE) in Dye sensitized solar cells. The gold nanoparticles (AuNPs) bind to DNA in aqueous solution due to the polyanionic nature of DNA. When a scribe is made on the dropcasted Au-DNA solution, the diffusion of Au-DNA complex occurs towards the edges of the scribe due to the coffee ring effect. Capillary force induces evaporation of water that also forces the Au-DNA complex to migrate towards the scribed edges. Meanwhile, the AuNPs are reduced on the surface of DNA to form active seed for nucleation and growth of AuWs. DNA molecules act as a scaffold to arrange the nanoparticles into well-connected submicron to nanoscale wires. The cyclic voltammetry measurements showed that AuWs/Pt/ITO CE exhibited better electro-catalytic activity and higher conductivity than conventional Pt/ITO CE due to the synergistic effect of Pt and AuWs network on ITO. The DSSC fabricated using TiO2 photoanode, N719 dye, I3 −/I− electrolyte and AuWs/Pt/ITO CE showed a 36% increase in efficiency as compared to the cells made under same parameters but using conventional (Pt/ITO) CE. Springer 2018 Article PeerReviewed Shakir, Sehar and Foo, Yiing Yee and Rizan, Nastaran and Abd-ur-Rehman, Hafiz M. and Yunus, Kamran and Phang, Siew Moi and Periasamy, Vengadesh (2018) Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells. Journal of Materials Science: Materials in Electronics, 29 (6). pp. 4602-4611. ISSN 0957-4522 https://doi.org/10.1007/s10854-017-8411-3 doi:10.1007/s10854-017-8411-3
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	Q Science (General) QC Physics QH Natural history
spellingShingle	Q Science (General) QC Physics QH Natural history Shakir, Sehar Foo, Yiing Yee Rizan, Nastaran Abd-ur-Rehman, Hafiz M. Yunus, Kamran Phang, Siew Moi Periasamy, Vengadesh Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells
description	DNA templated gold wires (AuWs) were fabricated on Pt sputtered ITO (Pt/ITO) substrates using ‘scribing’ or ‘writing’ method to be used as a modified counter electrode (CE) in Dye sensitized solar cells. The gold nanoparticles (AuNPs) bind to DNA in aqueous solution due to the polyanionic nature of DNA. When a scribe is made on the dropcasted Au-DNA solution, the diffusion of Au-DNA complex occurs towards the edges of the scribe due to the coffee ring effect. Capillary force induces evaporation of water that also forces the Au-DNA complex to migrate towards the scribed edges. Meanwhile, the AuNPs are reduced on the surface of DNA to form active seed for nucleation and growth of AuWs. DNA molecules act as a scaffold to arrange the nanoparticles into well-connected submicron to nanoscale wires. The cyclic voltammetry measurements showed that AuWs/Pt/ITO CE exhibited better electro-catalytic activity and higher conductivity than conventional Pt/ITO CE due to the synergistic effect of Pt and AuWs network on ITO. The DSSC fabricated using TiO2 photoanode, N719 dye, I3 −/I− electrolyte and AuWs/Pt/ITO CE showed a 36% increase in efficiency as compared to the cells made under same parameters but using conventional (Pt/ITO) CE.
format	Article
author	Shakir, Sehar Foo, Yiing Yee Rizan, Nastaran Abd-ur-Rehman, Hafiz M. Yunus, Kamran Phang, Siew Moi Periasamy, Vengadesh
author_facet	Shakir, Sehar Foo, Yiing Yee Rizan, Nastaran Abd-ur-Rehman, Hafiz M. Yunus, Kamran Phang, Siew Moi Periasamy, Vengadesh
author_sort	Shakir, Sehar
title	Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells
title_short	Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells
title_full	Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells
title_fullStr	Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells
title_full_unstemmed	Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells
title_sort	electro-catalytic and structural studies of dna templated gold wires on platinum/ito as modified counter electrode in dye sensitized solar cells
publisher	Springer
publishDate	2018
url	http://eprints.um.edu.my/20713/ https://doi.org/10.1007/s10854-017-8411-3
_version_	1643691357983735808
score	13.211869

Electro-catalytic and structural studies of DNA templated gold wires on platinum/ITO as modified counter electrode in dye sensitized solar cells

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