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- W4367051330 abstract "Abstract Poly‐ L ‐lactide (PLLA) offers a unique possibility for processing into biocompatible, biodegradable, and implantable piezoelectric structures. With such properties, PLLA has potential to be used as an advanced tool for mimicking biophysical processes that naturally occur during the self‐repair of wounds and damaged tissues, including electrostimulated regeneration. The piezoelectricity of PLLA strongly depends on the possibility of controlling its crystallinity and molecular orientation. Here, it is shown that modifying PLLA with a small amount (1 wt%) of crystalline filler particles with a high aspect ratio, which act as nucleating agents during drawing‐induced crystallization, promotes the formation of highly crystalline and oriented PLLA structures. This increases their piezoelectricity, and the filler‐modified PLLA films provide a 20‐fold larger voltage output than nonmodified PLLA during ultrasound (US)‐assisted activation. With 99% PLLA content, the ability of the films to produce reactive oxygen species (ROS) and increase the local temperature during interactions with US is shown to be very low. US‐assisted piezostimulation of adherent cells directly attach to their surface (such as skin keratinocytes), stimulate cytoskeleton formation, and as a result cells elongate and orient themselves in a specific direction that align with the direction of PLLA film drawing and PLLA dipole orientation." @default.
- W4367051330 created "2023-04-27" @default.
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- W4367051330 date "2023-04-26" @default.
- W4367051330 modified "2023-10-18" @default.
- W4367051330 title "Filler‐Enhanced Piezoelectricity of Poly‐<i>L</i>‐Lactide and Its Use as a Functional Ultrasound‐Activated Biomaterial" @default.
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- W4367051330 doi "https://doi.org/10.1002/smll.202301981" @default.
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- W4367051330 hasPublicationYear "2023" @default.
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