Sensing the ocean electric fields via a self-supported CNT sponge

Kai Chen; Yun Chen; Haifan Li; Jingshan Liu; Sixuan Song; Weibo Huang; Shaodian Yang; Nuofu Chen; Xuchun Gui; Jikun Chen

doi:10.1063/5.0183770

Sensing the ocean electric fields via a self-supported CNT sponge

Kai Chen^*, Yun Chen, Haifan Li, Jingshan Liu, Sixuan Song, Weibo Huang, Shaodian Yang, Nuofu Chen, Xuchun Gui^*, Jikun Chen^*

^*Corresponding author for this work

Department of Chemistry

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

A self-supported CNT sponge is composed of uniformly twisted CNTs with high aspect ratio that enables the large specific surface area and good carrier conduction to go beyond the conventional carbon-based materials, shedding light on its high electrochemical activity in salt water. Herein, we demonstrate the comparable performance of the CNT sponge as the electrode pair to the most commonly used Ag/AgCl for sensing underwater electric fields. The CNT sponge electrodes exhibit a high electrochemical reactivity in salt water with a low noise of ∼10 nV/rt(Hz)@100 Hz within a wide range of the electric field frequency (e.g., 10-10⁵ Hz), while the frequency response approaches a constant magnitude across the same range of frequency. The performance of the CNT sponge electrodes in ocean electric field sensing is further verified by measuring the electrical signal response curve at various characteristic frequencies within a small water container, and also under a simulated source within the water pool. The high chemical stability and low costs of carbon-based CNT sponges pave the way to their potential applications. Published under an exclusive license by AIP Publishing

Original language	English
Article number	043502
Journal	Applied Physics Letters
Volume	124
Issue number	4
Online published	22 Jan 2024
DOIs	https://doi.org/10.1063/5.0183770
Publication status	Published - 22 Jan 2024

Funding

This work is supported by funding from the National Key Research and Development Program of China (Grant No. 2022YFC2807900) and the National Natural Science Foundation of China (Grant Nos. 42174081 and 62074014). J. Chen also acknowledges the Xiaomi Scholar project.

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Kai Chen, Yun Chen, Haifan Li, Jingshan Liu, Sixuan Song, Weibo Huang, Shaodian Yang, Nuofu Chen, Xuchun Gui, Jikun Chen; Sensing the ocean electric fields via a self-supported CNT sponge. Appl. Phys. Lett. 22 January 2024; 124 (4): 043502 and may be found at https://doi.org/10.1063/5.0183770.

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abstract = "A self-supported CNT sponge is composed of uniformly twisted CNTs with high aspect ratio that enables the large specific surface area and good carrier conduction to go beyond the conventional carbon-based materials, shedding light on its high electrochemical activity in salt water. Herein, we demonstrate the comparable performance of the CNT sponge as the electrode pair to the most commonly used Ag/AgCl for sensing underwater electric fields. The CNT sponge electrodes exhibit a high electrochemical reactivity in salt water with a low noise of ∼10 nV/rt(Hz)@100 Hz within a wide range of the electric field frequency (e.g., 10-105 Hz), while the frequency response approaches a constant magnitude across the same range of frequency. The performance of the CNT sponge electrodes in ocean electric field sensing is further verified by measuring the electrical signal response curve at various characteristic frequencies within a small water container, and also under a simulated source within the water pool. The high chemical stability and low costs of carbon-based CNT sponges pave the way to their potential applications. Published under an exclusive license by AIP Publishing",

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AU - Chen, Yun

AU - Li, Haifan

AU - Liu, Jingshan

AU - Song, Sixuan

AU - Huang, Weibo

AU - Yang, Shaodian

AU - Chen, Nuofu

AU - Gui, Xuchun

AU - Chen, Jikun

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N2 - A self-supported CNT sponge is composed of uniformly twisted CNTs with high aspect ratio that enables the large specific surface area and good carrier conduction to go beyond the conventional carbon-based materials, shedding light on its high electrochemical activity in salt water. Herein, we demonstrate the comparable performance of the CNT sponge as the electrode pair to the most commonly used Ag/AgCl for sensing underwater electric fields. The CNT sponge electrodes exhibit a high electrochemical reactivity in salt water with a low noise of ∼10 nV/rt(Hz)@100 Hz within a wide range of the electric field frequency (e.g., 10-105 Hz), while the frequency response approaches a constant magnitude across the same range of frequency. The performance of the CNT sponge electrodes in ocean electric field sensing is further verified by measuring the electrical signal response curve at various characteristic frequencies within a small water container, and also under a simulated source within the water pool. The high chemical stability and low costs of carbon-based CNT sponges pave the way to their potential applications. Published under an exclusive license by AIP Publishing

AB - A self-supported CNT sponge is composed of uniformly twisted CNTs with high aspect ratio that enables the large specific surface area and good carrier conduction to go beyond the conventional carbon-based materials, shedding light on its high electrochemical activity in salt water. Herein, we demonstrate the comparable performance of the CNT sponge as the electrode pair to the most commonly used Ag/AgCl for sensing underwater electric fields. The CNT sponge electrodes exhibit a high electrochemical reactivity in salt water with a low noise of ∼10 nV/rt(Hz)@100 Hz within a wide range of the electric field frequency (e.g., 10-105 Hz), while the frequency response approaches a constant magnitude across the same range of frequency. The performance of the CNT sponge electrodes in ocean electric field sensing is further verified by measuring the electrical signal response curve at various characteristic frequencies within a small water container, and also under a simulated source within the water pool. The high chemical stability and low costs of carbon-based CNT sponges pave the way to their potential applications. Published under an exclusive license by AIP Publishing

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Sensing the ocean electric fields via a self-supported CNT sponge

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