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Acid-Interface Engineering of Carbon Nanotube/Elastomers with Enhanced Sensitivity for Stretchable Strain Sensors.
ACS Appl Mater Interfaces 2018; 10(43):37760-37766AA

Abstract

Stretchable strain sensors with high sensitivity or gauge factor (GF), large stretchability, and long-term durability are highly demanded in human motion detection, artificial intelligence, and electronic skins. Nevertheless, to develop high-sensitive sensors without sacrificing the stretchability cannot be realized using simple device configurations. In this work, an acid-interface engineering (AIE) method was proposed to develop a stretchable strain sensor with high GF and large stretchability. The AIE generates a layer of SiO x at the interface between the carbon nanotube (CNT) film and Ecoflex, playing a key role in enhancing the sensor's GF. Compared to devices without AIE (GF = 2.4), the ones with AIE are significantly improved. At an AIE time of 10 min, the GF up to 1665.9 is achieved without sacrificing the stretchability (>100%). The AIE-generated cracks are found to modulate the electrical behaviors and enhance the GFs of sensors with AIE through the crack-induced rapid reduction in the electrical conduction pathway, which is manipulated by the CNTs bridging over the cracks. The device with AIE proves its high mechanical durability through a cycling test (>10 000 cycles) at a high strain up to ∼80%, further paving its practical applications in various human motion detections.

Authors+Show Affiliations

School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.School of Mechanical and Power Engineering , East China University of Science and Technology , Shanghai 200237 , China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30284440

Citation

Chen, Sijia, et al. "Acid-Interface Engineering of Carbon Nanotube/Elastomers With Enhanced Sensitivity for Stretchable Strain Sensors." ACS Applied Materials & Interfaces, vol. 10, no. 43, 2018, pp. 37760-37766.
Chen S, Wu R, Li P, et al. Acid-Interface Engineering of Carbon Nanotube/Elastomers with Enhanced Sensitivity for Stretchable Strain Sensors. ACS Appl Mater Interfaces. 2018;10(43):37760-37766.
Chen, S., Wu, R., Li, P., Li, Q., Gao, Y., Qian, B., & Xuan, F. (2018). Acid-Interface Engineering of Carbon Nanotube/Elastomers with Enhanced Sensitivity for Stretchable Strain Sensors. ACS Applied Materials & Interfaces, 10(43), pp. 37760-37766. doi:10.1021/acsami.8b16591.
Chen S, et al. Acid-Interface Engineering of Carbon Nanotube/Elastomers With Enhanced Sensitivity for Stretchable Strain Sensors. ACS Appl Mater Interfaces. 2018 Oct 31;10(43):37760-37766. PubMed PMID: 30284440.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Acid-Interface Engineering of Carbon Nanotube/Elastomers with Enhanced Sensitivity for Stretchable Strain Sensors. AU - Chen,Sijia, AU - Wu,Rongyao, AU - Li,Pei, AU - Li,Qi, AU - Gao,Yang, AU - Qian,Bo, AU - Xuan,Fuzhen, Y1 - 2018/10/16/ PY - 2018/10/5/pubmed PY - 2018/10/5/medline PY - 2018/10/5/entrez KW - acid-interface engineering KW - electronic skin KW - human motion detection KW - stretchable strain sensor KW - surface cracks SP - 37760 EP - 37766 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 10 IS - 43 N2 - Stretchable strain sensors with high sensitivity or gauge factor (GF), large stretchability, and long-term durability are highly demanded in human motion detection, artificial intelligence, and electronic skins. Nevertheless, to develop high-sensitive sensors without sacrificing the stretchability cannot be realized using simple device configurations. In this work, an acid-interface engineering (AIE) method was proposed to develop a stretchable strain sensor with high GF and large stretchability. The AIE generates a layer of SiO x at the interface between the carbon nanotube (CNT) film and Ecoflex, playing a key role in enhancing the sensor's GF. Compared to devices without AIE (GF = 2.4), the ones with AIE are significantly improved. At an AIE time of 10 min, the GF up to 1665.9 is achieved without sacrificing the stretchability (>100%). The AIE-generated cracks are found to modulate the electrical behaviors and enhance the GFs of sensors with AIE through the crack-induced rapid reduction in the electrical conduction pathway, which is manipulated by the CNTs bridging over the cracks. The device with AIE proves its high mechanical durability through a cycling test (>10 000 cycles) at a high strain up to ∼80%, further paving its practical applications in various human motion detections. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/30284440/Acid_Interface_Engineering_of_Carbon_Nanotube/Elastomers_with_Enhanced_Sensitivity_for_Stretchable_Strain_Sensors_ L2 - https://dx.doi.org/10.1021/acsami.8b16591 DB - PRIME DP - Unbound Medicine ER -