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Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis

Anitha Devadoss Orcid Logo, Asako Kuragano, Chiaki Terashima, Sudhagar Pitchaimuthu Orcid Logo, Kazuya Nakata, Takeshi Kondo, Makoto Yuasa, Akira Fujishima

Journal of Materials Chemistry B, Volume: 4, Issue: 2, Pages: 220 - 228

Swansea University Authors: Anitha Devadoss Orcid Logo, Sudhagar Pitchaimuthu Orcid Logo

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DOI (Published version): 10.1039/c5tb01740h

Abstract

Understanding the fundamentals of photoelectrocatalytic (PEC) biomolecular oxidation benefits thedevelopment of next-generation PEC biosensors. In this work, single-step electrospun titanium-di-oxide–gold (TiO2–Au) hybrid nanofibers (HNF) are reported as being a potential candidate for PEC glutathio...

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Published in: Journal of Materials Chemistry B
ISSN: 2050-750X 2050-7518
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa34472
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spelling 2021-09-24T15:32:14.1874547 v2 34472 2017-06-23 Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis a01150750f1c8eccbfeebffdde3fe8a1 0000-0002-8052-1820 Anitha Devadoss Anitha Devadoss true false 2fdbee02f4bfc5a1b174c8bd04afbd2b 0000-0001-9098-8806 Sudhagar Pitchaimuthu Sudhagar Pitchaimuthu true false 2017-06-23 EEN Understanding the fundamentals of photoelectrocatalytic (PEC) biomolecular oxidation benefits thedevelopment of next-generation PEC biosensors. In this work, single-step electrospun titanium-di-oxide–gold (TiO2–Au) hybrid nanofibers (HNF) are reported as being a potential candidate for PEC glutathione(GSH) bioanalysis. The chemical environment of TiO2 and TiO2–Au HNFs were studied with X-ray photoelectronspectroscopy and found to have a strong electronic interaction between TiO2 and the Au nanoparticles(NPs). The PEC measurements revealed that the intramolecular backbone hydrogen bonding ofGSH molecules predominantly contributes highly active Au–GSH bio-nano interfaces, which facilitate thePEC oxidation rate of GSH and thus enhance the photocurrent. Furthermore, the Au NPs present act asauxiliary electron transport channels resulting in enhanced charge collection at the external circuit. As aresult, the TiO2–Au electrode generated a two-fold higher photocurrent density of B84.4 mA cm2 in thepresence of 0.5 mM GSH, where the pristine TiO2 NFs displayed only a negligible influence. Likewise, theTiO2–Au HNF electrode showed a higher sensitivity of 0.002 mM and a wide linear detection rangebetween 0.022 mM and 0.7 mM, with a superior selectivity towards GSH bioanalysis over ascorbic acidand glucose at 0.33 V (versus silver/silver chloride) than that obtained with pristine TiO2. The implicationsof these findings towards the development of a next-generation PEC biosensor are discussed. Journal Article Journal of Materials Chemistry B 4 2 220 228 2050-750X 2050-7518 31 12 2016 2016-12-31 10.1039/c5tb01740h COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2021-09-24T15:32:14.1874547 2017-06-23T13:05:14.4806090 College of Engineering Engineering Anitha Devadoss 0000-0002-8052-1820 1 Asako Kuragano 2 Chiaki Terashima 3 Sudhagar Pitchaimuthu 0000-0001-9098-8806 4 Kazuya Nakata 5 Takeshi Kondo 6 Makoto Yuasa 7 Akira Fujishima 8
title Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
spellingShingle Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
Anitha Devadoss
Sudhagar Pitchaimuthu
title_short Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
title_full Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
title_fullStr Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
title_full_unstemmed Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
title_sort Single-step electrospun TiO2–Au hybrid electrodes for high selectivity photoelectrocatalytic glutathione bioanalysis
author_id_str_mv a01150750f1c8eccbfeebffdde3fe8a1
2fdbee02f4bfc5a1b174c8bd04afbd2b
author_id_fullname_str_mv a01150750f1c8eccbfeebffdde3fe8a1_***_Anitha Devadoss
2fdbee02f4bfc5a1b174c8bd04afbd2b_***_Sudhagar Pitchaimuthu
author Anitha Devadoss
Sudhagar Pitchaimuthu
author2 Anitha Devadoss
Asako Kuragano
Chiaki Terashima
Sudhagar Pitchaimuthu
Kazuya Nakata
Takeshi Kondo
Makoto Yuasa
Akira Fujishima
format Journal article
container_title Journal of Materials Chemistry B
container_volume 4
container_issue 2
container_start_page 220
publishDate 2016
institution Swansea University
issn 2050-750X
2050-7518
doi_str_mv 10.1039/c5tb01740h
college_str College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
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description Understanding the fundamentals of photoelectrocatalytic (PEC) biomolecular oxidation benefits thedevelopment of next-generation PEC biosensors. In this work, single-step electrospun titanium-di-oxide–gold (TiO2–Au) hybrid nanofibers (HNF) are reported as being a potential candidate for PEC glutathione(GSH) bioanalysis. The chemical environment of TiO2 and TiO2–Au HNFs were studied with X-ray photoelectronspectroscopy and found to have a strong electronic interaction between TiO2 and the Au nanoparticles(NPs). The PEC measurements revealed that the intramolecular backbone hydrogen bonding ofGSH molecules predominantly contributes highly active Au–GSH bio-nano interfaces, which facilitate thePEC oxidation rate of GSH and thus enhance the photocurrent. Furthermore, the Au NPs present act asauxiliary electron transport channels resulting in enhanced charge collection at the external circuit. As aresult, the TiO2–Au electrode generated a two-fold higher photocurrent density of B84.4 mA cm2 in thepresence of 0.5 mM GSH, where the pristine TiO2 NFs displayed only a negligible influence. Likewise, theTiO2–Au HNF electrode showed a higher sensitivity of 0.002 mM and a wide linear detection rangebetween 0.022 mM and 0.7 mM, with a superior selectivity towards GSH bioanalysis over ascorbic acidand glucose at 0.33 V (versus silver/silver chloride) than that obtained with pristine TiO2. The implicationsof these findings towards the development of a next-generation PEC biosensor are discussed.
published_date 2016-12-31T03:47:07Z
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