A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design

Shu Gong; Lim Wei Yap; Yi Zhu; Bowen Zhu; Yan Wang; Yunzhi Ling; Yunmeng Zhao; Tiance An; Yuerui Lu; Wenlong Cheng

doi:10.1002/adfm.201910717

A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design

Shu Gong, Lim Wei Yap, Yi Zhu, Bowen Zhu, Yan Wang, Yunzhi Ling, Yunmeng Zhao, Tiance An, Yuerui Lu, Wenlong Cheng^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

64 Scopus citations

Abstract

An artificial basilar membrane (ABM) is an acoustic transducer that mimics the mechanical frequency selectivity of the real basilar membrane, which has the potential to revolutionize current cochlear implant technology. While such ABMs can be potentially realized using piezoelectric, triboelectric, and capacitive transduction methods, it remains notoriously difficult to achieve resistive ABM due to the poor frequency discrimination of resistive-type materials. Here, a point crack technology on noncracking vertically aligned gold nanowire (V-AuNW) films is reported, which allows for designing soft acoustic sensors with electric signals in good agreement with vibrometer output—a capability not achieved with corresponding bulk cracking system. The strategy can lead to soft microphones for music recognition comparable to the conventional microphone. Moreover, a soft resistive ABM is demonstrated by integrating eight nanowire-based sensor strips on a soft trapezoid frame. The wearable ABM exhibits high-frequency selectivity in the range of 319–1951 Hz and high sensitivity of 0.48–4.26 Pa⁻¹. The simple yet efficient fabrication in conjunction with programmable crack design indicates the promise of the methodology for a wide range of applications in future wearable voice recognition devices, cochlea implants, and human–machine interfaces.

Original language	English
Article number	1910717
Journal	Advanced Functional Materials
Volume	30
Issue number	25
DOIs	https://doi.org/10.1002/adfm.201910717
State	Published - 1 Jun 2020
Externally published	Yes

Keywords

acoustic sensors
artificial basilar membranes
point crack design
soft microphones
standing gold nanowires

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10.1002/adfm.201910717

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title = "A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design",

abstract = "An artificial basilar membrane (ABM) is an acoustic transducer that mimics the mechanical frequency selectivity of the real basilar membrane, which has the potential to revolutionize current cochlear implant technology. While such ABMs can be potentially realized using piezoelectric, triboelectric, and capacitive transduction methods, it remains notoriously difficult to achieve resistive ABM due to the poor frequency discrimination of resistive-type materials. Here, a point crack technology on noncracking vertically aligned gold nanowire (V-AuNW) films is reported, which allows for designing soft acoustic sensors with electric signals in good agreement with vibrometer output—a capability not achieved with corresponding bulk cracking system. The strategy can lead to soft microphones for music recognition comparable to the conventional microphone. Moreover, a soft resistive ABM is demonstrated by integrating eight nanowire-based sensor strips on a soft trapezoid frame. The wearable ABM exhibits high-frequency selectivity in the range of 319–1951 Hz and high sensitivity of 0.48–4.26 Pa−1. The simple yet efficient fabrication in conjunction with programmable crack design indicates the promise of the methodology for a wide range of applications in future wearable voice recognition devices, cochlea implants, and human–machine interfaces.",

keywords = "acoustic sensors, artificial basilar membranes, point crack design, soft microphones, standing gold nanowires",

author = "Shu Gong and Yap, {Lim Wei} and Yi Zhu and Bowen Zhu and Yan Wang and Yunzhi Ling and Yunmeng Zhao and Tiance An and Yuerui Lu and Wenlong Cheng",

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year = "2020",

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doi = "10.1002/adfm.201910717",

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T1 - A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design

AU - Gong, Shu

AU - Yap, Lim Wei

AU - Zhu, Yi

AU - Zhu, Bowen

AU - Wang, Yan

AU - Ling, Yunzhi

AU - Zhao, Yunmeng

AU - An, Tiance

AU - Lu, Yuerui

AU - Cheng, Wenlong

PY - 2020/6/1

Y1 - 2020/6/1

N2 - An artificial basilar membrane (ABM) is an acoustic transducer that mimics the mechanical frequency selectivity of the real basilar membrane, which has the potential to revolutionize current cochlear implant technology. While such ABMs can be potentially realized using piezoelectric, triboelectric, and capacitive transduction methods, it remains notoriously difficult to achieve resistive ABM due to the poor frequency discrimination of resistive-type materials. Here, a point crack technology on noncracking vertically aligned gold nanowire (V-AuNW) films is reported, which allows for designing soft acoustic sensors with electric signals in good agreement with vibrometer output—a capability not achieved with corresponding bulk cracking system. The strategy can lead to soft microphones for music recognition comparable to the conventional microphone. Moreover, a soft resistive ABM is demonstrated by integrating eight nanowire-based sensor strips on a soft trapezoid frame. The wearable ABM exhibits high-frequency selectivity in the range of 319–1951 Hz and high sensitivity of 0.48–4.26 Pa−1. The simple yet efficient fabrication in conjunction with programmable crack design indicates the promise of the methodology for a wide range of applications in future wearable voice recognition devices, cochlea implants, and human–machine interfaces.

AB - An artificial basilar membrane (ABM) is an acoustic transducer that mimics the mechanical frequency selectivity of the real basilar membrane, which has the potential to revolutionize current cochlear implant technology. While such ABMs can be potentially realized using piezoelectric, triboelectric, and capacitive transduction methods, it remains notoriously difficult to achieve resistive ABM due to the poor frequency discrimination of resistive-type materials. Here, a point crack technology on noncracking vertically aligned gold nanowire (V-AuNW) films is reported, which allows for designing soft acoustic sensors with electric signals in good agreement with vibrometer output—a capability not achieved with corresponding bulk cracking system. The strategy can lead to soft microphones for music recognition comparable to the conventional microphone. Moreover, a soft resistive ABM is demonstrated by integrating eight nanowire-based sensor strips on a soft trapezoid frame. The wearable ABM exhibits high-frequency selectivity in the range of 319–1951 Hz and high sensitivity of 0.48–4.26 Pa−1. The simple yet efficient fabrication in conjunction with programmable crack design indicates the promise of the methodology for a wide range of applications in future wearable voice recognition devices, cochlea implants, and human–machine interfaces.

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KW - artificial basilar membranes

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KW - standing gold nanowires

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A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design

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