Piezoelectricity and electrostriction in biocompatible (Na,K)NbO3 nanofiber scaffolds
2014 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 104, no 24, 243701- p.Article in journal (Refereed) Published
Single phase and highly crystalline biocompatible ferroelectric (Na,K)NbO3 (NKN) nanofibers were synthesized by sol-gel assisted electrospinning technique. Low amplitude piezoelectric response as well as electrostriction effect in NKN fibers were examined using piezoelectric force microscopy technique. Piezoelectric coefficient d(33) is strongly anisotropic varying from 75.8 to 18.3 pm/V for, respectively, out-of-axis and on-axis oriented ferroelectric domains in NKN fibers. Hysteresis P-E loop for individual nanofiber reconstructed from the bipolar E-field-induced butterfly strain curve yields: coercive field E-c = 31 kV/cm, remnant P-r = 6.2 mu C/cm(2), and the maximum achieved polarization P-max = 21.2 mu C/cm(2). Enhanced piezoelectric effect and strong electrostriction promise NKN fibers as electrically polarizable scaffolds for tissue engineering and for energy harvesting biocompatible nanogenerators.
Place, publisher, year, edition, pages
2014. Vol. 104, no 24, 243701- p.
Electrically Polarized Hydroxyapatite, In-Vitro, Ceramics, Titanate, Films
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-148290DOI: 10.1063/1.4884117ISI: 000337915000110ScopusID: 2-s2.0-84903188467OAI: oai:DiVA.org:kth-148290DiVA: diva2:736596
QC 201408072014-08-072014-08-052014-08-07Bibliographically approved