Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 21, Issue 17, Pages 3242-3249Publisher
WILEY-BLACKWELL
DOI: 10.1002/adfm.201100298
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Funding
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
- Nano Hybrids Center of Korea Institute of Science and Technology (KIST)
- National Research Laboratory [R0A-2008-000-20057-0]
- World Class University (WCU) [R32-2008-000-10051-0]
- Korean government
- Korea Evaluation Institute of Industrial Technology (KEIT) [K0004109] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [R0A-2008-000-20057-0, R32-2011-000-10051-0, 2011-56529, 2008-0060005] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Electrostriction facilitates the electric field-stimulated mechanical actuation of dielectric materials. This work demonstrates that introduction of dielectric mismatched nanodomains to a dielectric elastomer results in an unexpected ultralarge electrostriction coefficient, enabling a large electromechanical strain response at a low electric field. This strong electrostrictive effect is attributed to the development of an inhomogeneous electric field across the film thickness due to the high density of interfaces between dielectric mismatched periodic nanoscale domains. The periodic nanostructure of the nanostructured gel also makes it possible to measure the true electromechanical strain from the dimensional change monitored via in situ synchrotron small angle X-ray scattering. The work offers a promising pathway to design novel high performance dielectric elastomers as well as to understand the underlying operational mechanism of nanostructured multiphase electrostrictive systems.
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