Journal
NANOSCALE
Volume 6, Issue 6, Pages 3289-3295Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr06007a
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Funding
- National Natural Science Foundation of China [51322507, 51035002, 51121002]
- New Century Excellent Talents in University [NCET-11-0171]
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Piezoelectric structures, in forms that allow mere in-surface deformations under large strains, are attractive for bio-integrated systems. Here, mechano-electrospinning (MES) is presented to direct-write straight nanofibers of polyvinylidene fluoride onto a prestrained poly(dimethylsiloxane) (PDMS) substrate, to position and polarize a piezoelectric nanofiber array in one-step. Wrinkled/non-wrinkled buckling modes are found when the substrates are released, and the morphology of the direct-written fiber proved the key to determine the buckling modes, which can be tuned precisely by MES parameters. The non-wrinkled, stretchable piezoelectric devices with a highly synchronized serpentine fiber array exhibit their in-surface deformation and stable piezoelectric performance up the failure strain of PDMS (similar to 110% in our study), which may be used as stretchable sensors and energy converters/providers.
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