A Sandwiched/Cracked Flexible Film for Multi-Thermal Monitoring and Switching Devices
Type
ArticleKAUST Department
Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2017-09-08Online Publication Date
2017-09-08Print Publication Date
2017-09-20Permanent link to this record
http://hdl.handle.net/10754/625749
Metadata
Show full item recordAbstract
Polydimethylsiloxane (PDMS)-based flexible films have substantiated advantages in various sensing applications. Here, we demonstrate the highly sensitive and programmable thermal-sensing capability (thermal index, B, up to 126 × 103 K) of flexible films with tunable sandwiched microstructures (PDMS/cracked single-walled carbon nanotube (SWCNT) film/PDMS) when a thermal stimulus is applied. We found that this excellent performance results from the following features of the film's structural and material design: (1) the sandwiched structure allows the film to switch from a three-dimensional to a two-dimensional in-plane deformation and (2) the stiffness of the SWCNT film is decreased by introducing microcracks that make deformation easy and that promote the macroscopic piezoresistive behavior of SWCNT crack islands and the microscopic piezoresistive behavior of SWCNT bundles. The PDMS layer is characterized by a high coefficient of thermal expansion (α = 310 × 10-6 K-1) and low stiffness (∼2 MPa) that allow for greater flexibility and higher temperature sensitivity. We determined the efficacy of our sandwiched, cracked, flexible films in monitoring and switching flexible devices when subjected to various stimuli, including thermal conduction, thermal radiation, and light radiation.Citation
Tai Y, Chen T, Lubineau G (2017) A Sandwiched/Cracked Flexible Film for Multithermal Monitoring and Switching Devices. ACS Applied Materials & Interfaces 9: 32184–32191. Available: http://dx.doi.org/10.1021/acsami.7b05467.Sponsors
We express gratitude to the King Abdullah University of Science and Technology (KAUST) for baseline research funding, the Natural Science Foundation of China (51573203, 21404111, and 51503216), the Key Research Program of Frontier Sciences, the Chinese Academy of Sciences (QYZDB-SSW-SLH036), the Ningbo Science and Technology Bureau (2013B10040 and 2014B82010), and the National Basic Research Program of China (2011CB605602) for financial support.Publisher
American Chemical Society (ACS)PubMed ID
28853543Additional Links
http://pubs.acs.org/doi/abs/10.1021/acsami.7b05467http://pubs.acs.org/doi/abs/10.1021/acsami.7b05467
ae974a485f413a2113503eed53cd6c53
10.1021/acsami.7b05467
Scopus Count
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