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Wearable Strain Sensors Using Light Transmittance Change of Carbon Nanotube-Embedded Elastomers with Microcracks.
ACS Appl Mater Interfaces. 2020 Jan 29 [Online ahead of print]AA

Abstract

A number of flexible and stretchable strain sensors based on piezoresistive and capacitive principles have been recently developed. However, piezoresistive sensors suffer from poor long-term stability and considerable hysteresis of signals. On the other hand, capacitive sensors exhibit limited sensitivity and strong electromagnetic interference from the neighboring environment. In order to resolve these problems, a novel stretchable strain sensor based on the modulation of optical transmittance of carbon nanotube (CNT)-embedded Ecoflex is introduced in this paper. Within the film of multiwalled CNTs embedded in the Ecoflex substrate, the microcracks are propagated under tensile strain, changing the optical transmittance of the film. The proposed sensor exhibits good stretchability (ε ≈ 400%), high linearity (R2 > 0.98) in the strain range of ε = 0-100%, excellent stability, high sensitivity (gauge factor ≈ 30), and small hysteresis (∼1.8%). The sensor was utilized to detect the bending of the finger and wrist for the control of a robot arm. Furthermore, the applications of this sensor to the real-time posture monitoring of the neck and to the detection of subtle human motions were demonstrated.

Authors+Show Affiliations

Department of Mechanical Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Yuseong-gu, Daejeon 305-701 , South Korea.Package Process Development Team Samsung Electronics , 158 Baebang-ro, Baebang-eup , Asan-si , Chungcheongnam-do , South Korea.Department of Mechanical Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Yuseong-gu, Daejeon 305-701 , South Korea.Department of Mechanical Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Yuseong-gu, Daejeon 305-701 , South Korea.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31877014

Citation

Gu, Jimin, et al. "Wearable Strain Sensors Using Light Transmittance Change of Carbon Nanotube-Embedded Elastomers With Microcracks." ACS Applied Materials & Interfaces, 2020.
Gu J, Kwon D, Ahn J, et al. Wearable Strain Sensors Using Light Transmittance Change of Carbon Nanotube-Embedded Elastomers with Microcracks. ACS Appl Mater Interfaces. 2020.
Gu, J., Kwon, D., Ahn, J., & Park, I. (2020). Wearable Strain Sensors Using Light Transmittance Change of Carbon Nanotube-Embedded Elastomers with Microcracks. ACS Applied Materials & Interfaces. https://doi.org/10.1021/acsami.9b18069
Gu J, et al. Wearable Strain Sensors Using Light Transmittance Change of Carbon Nanotube-Embedded Elastomers With Microcracks. ACS Appl Mater Interfaces. 2020 Jan 29; PubMed PMID: 31877014.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Wearable Strain Sensors Using Light Transmittance Change of Carbon Nanotube-Embedded Elastomers with Microcracks. AU - Gu,Jimin, AU - Kwon,Donguk, AU - Ahn,Junseong, AU - Park,Inkyu, Y1 - 2020/01/29/ PY - 2019/12/27/pubmed PY - 2019/12/27/medline PY - 2019/12/27/entrez KW - carbon nanotube KW - elastomer composite KW - optical strain sensor KW - stretchable sensor KW - wearable sensor JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces N2 - A number of flexible and stretchable strain sensors based on piezoresistive and capacitive principles have been recently developed. However, piezoresistive sensors suffer from poor long-term stability and considerable hysteresis of signals. On the other hand, capacitive sensors exhibit limited sensitivity and strong electromagnetic interference from the neighboring environment. In order to resolve these problems, a novel stretchable strain sensor based on the modulation of optical transmittance of carbon nanotube (CNT)-embedded Ecoflex is introduced in this paper. Within the film of multiwalled CNTs embedded in the Ecoflex substrate, the microcracks are propagated under tensile strain, changing the optical transmittance of the film. The proposed sensor exhibits good stretchability (ε ≈ 400%), high linearity (R2 > 0.98) in the strain range of ε = 0-100%, excellent stability, high sensitivity (gauge factor ≈ 30), and small hysteresis (∼1.8%). The sensor was utilized to detect the bending of the finger and wrist for the control of a robot arm. Furthermore, the applications of this sensor to the real-time posture monitoring of the neck and to the detection of subtle human motions were demonstrated. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/31877014/Wearable_Strain_Sensors_Using_Light_Transmittance_Change_of_Carbon_Nanotube_Embedded_Elastomers_with_Microcracks_ L2 - https://dx.doi.org/10.1021/acsami.9b18069 DB - PRIME DP - Unbound Medicine ER -
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