Flexible and Highly Sensitive Pressure Sensors Based on Bionic Hierarchical Structures

The rational design of high‐performance flexible pressure sensors attracts attention because of the potential applications in wearable electronics and human–machine interfacing. For practical applications, pressure sensors with high sensitivity and low detection limit are desired. Here, ta simple pr...

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Bibliographic Details
Published in:Advanced functional materials 2017-03, Vol.27 (9), p.np-n/a
Main Authors: Jian, Muqiang, Xia, Kailun, Wang, Qi, Yin, Zhe, Wang, Huimin, Wang, Chunya, Xie, Huanhuan, Zhang, Mingchao, Zhang, Yingying
Format: Article
Language:English
Subjects:
Biomimetics
Bionics
Carbon nanotubes
Chemical vapor deposition
Electric potential
electronic skin
Electronics
Graphene
hierarchical structures
Man-machine interfaces
Materials science
Membranes
Nanotubes
Polydimethylsiloxane
Pressure sensors
Protuberances
Response time
Sensitivity
Sensors
Silicone resins
Structural hierarchy
Voltage
Wearable technology
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Summary:The rational design of high‐performance flexible pressure sensors attracts attention because of the potential applications in wearable electronics and human–machine interfacing. For practical applications, pressure sensors with high sensitivity and low detection limit are desired. Here, ta simple process to fabricate high‐performance pressure sensors based on biomimetic hierarchical structures and highly conductive active membranes is presented. Aligned carbon nanotubes/graphene (ACNT/G) is used as the active material and microstructured polydimethylsiloxane (m‐PDMS) molded from natural leaves is used as the flexible matrix. The highly conductive ACNT/G films with unique coalescent structures, which are directly grown using chemical vapor deposition, can be conformably coated on the m‐PDMS films with hierarchical protuberances. Flexible ACNT/G pressure sensors are then constructed by putting two ACNT/G/PDMS films face to face with the orientation of the ACNTs in the two films perpendicular to each other. Due to the unique hierarchical structures of both the ACNT/G and m‐PDMS films, the obtained pressure sensors demonstrate high sensitivity (19.8 kPa−1,
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201606066