Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry
Metal ions are known to play various roles in living organisms; therefore, the detection of metal ions in water resources is essential for monitoring health and environmental conditions. In contrast to artificially fabricated materials and devices, biological-friendly materials such as microalgae ha...
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sg-ntu-dr.10356-1611422022-08-16T08:13:39Z Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry Roxby, Daniel N. Rivy, Hamim Gong, Chaoyang Gong, Xuerui Yuan, Zhiyi Chang, Guo-En Chen, Yu-Cheng School of Electrical and Electronic Engineering School of Chemical and Biomedical Engineering Engineering::Electrical and electronic engineering Metal Ion Detection Optical Nanocavity Metal ions are known to play various roles in living organisms; therefore, the detection of metal ions in water resources is essential for monitoring health and environmental conditions. In contrast to artificially fabricated materials and devices, biological-friendly materials such as microalgae have been explored for detecting toxic chemicals by employing fluorescence emissions and biophotovoltaic fuel cells. However, complicated fabrication, long measurement time, and low sensitivity remain the greatest challenge due to the minimal amount of bioelectricity generated from whole-cell microalgae. Herein we report the novel concept of a microalgae living biosensor by enhancing photocurrent through nanocavities formed between copper (Cu) nanoparticles and the Cu-electrode beneath. The strong energy coupling between plasmon cavity modes and excited photosynthetic fluorescence from Chlorella demonstrated that photoelectrical efficiency could be significantly amplified by more than two orders of magnitude through nanocavity confinement. Simulation results reveal that substantial near-field enhancements could help confine the electric field to the electrodes. Finally, the microalgae sensor was exploited to detect various light and heavy metal ions with a breakthrough detection limit of 50 nM. This study is envisioned to provide inspirational insights on nanocavity-enhanced electrochemistry, opening new routes for biochemical detection, water monitoring, and sustainable optoelectronics. Ministry of Education (MOE) Nanyang Technological University We would like to thank the support from University Internal Grant NAP SUG - M4082308.040. We would especially like to thank financial support from the Ministry of Education Singapore AcRF Tier 1 RG 158/19-(S). 2022-08-16T08:13:38Z 2022-08-16T08:13:38Z 2020 Journal Article Roxby, D. N., Rivy, H., Gong, C., Gong, X., Yuan, Z., Chang, G. & Chen, Y. (2020). Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry. Biosensors & Bioelectronics, 165, 112420-. https://dx.doi.org/10.1016/j.bios.2020.112420 2155-6210 https://hdl.handle.net/10356/161142 10.1016/j.bios.2020.112420 32729538 2-s2.0-85087711720 165 112420 en M4082308.040 RG 158/19(S) Biosensors & Bioelectronics © 2020 Elsevier B.V. All rights reserved. |
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Engineering::Electrical and electronic engineering Metal Ion Detection Optical Nanocavity Roxby, Daniel N. Rivy, Hamim Gong, Chaoyang Gong, Xuerui Yuan, Zhiyi Chang, Guo-En Chen, Yu-Cheng Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
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Metal ions are known to play various roles in living organisms; therefore, the detection of metal ions in water resources is essential for monitoring health and environmental conditions. In contrast to artificially fabricated materials and devices, biological-friendly materials such as microalgae have been explored for detecting toxic chemicals by employing fluorescence emissions and biophotovoltaic fuel cells. However, complicated fabrication, long measurement time, and low sensitivity remain the greatest challenge due to the minimal amount of bioelectricity generated from whole-cell microalgae. Herein we report the novel concept of a microalgae living biosensor by enhancing photocurrent through nanocavities formed between copper (Cu) nanoparticles and the Cu-electrode beneath. The strong energy coupling between plasmon cavity modes and excited photosynthetic fluorescence from Chlorella demonstrated that photoelectrical efficiency could be significantly amplified by more than two orders of magnitude through nanocavity confinement. Simulation results reveal that substantial near-field enhancements could help confine the electric field to the electrodes. Finally, the microalgae sensor was exploited to detect various light and heavy metal ions with a breakthrough detection limit of 50 nM. This study is envisioned to provide inspirational insights on nanocavity-enhanced electrochemistry, opening new routes for biochemical detection, water monitoring, and sustainable optoelectronics. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Roxby, Daniel N. Rivy, Hamim Gong, Chaoyang Gong, Xuerui Yuan, Zhiyi Chang, Guo-En Chen, Yu-Cheng |
format |
Article |
author |
Roxby, Daniel N. Rivy, Hamim Gong, Chaoyang Gong, Xuerui Yuan, Zhiyi Chang, Guo-En Chen, Yu-Cheng |
author_sort |
Roxby, Daniel N. |
title |
Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
title_short |
Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
title_full |
Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
title_fullStr |
Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
title_full_unstemmed |
Microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
title_sort |
microalgae living sensor for metal ion detection with nanocavity-enhanced photoelectrochemistry |
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2022 |
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https://hdl.handle.net/10356/161142 |
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1743119575282614272 |