Enhanced piezoresponse of highly aligned electrospun poly(vinylidene fluoride) nanofibers
- Authors
- Kang, Sung Bum; Won, Sang Hyuk; Im, Min Ji; Kim, Chan Ul; Park, Won Il; Baik, Jeong Min; Choi, Kyoung Jin
- Issue Date
- Sep-2017
- Publisher
- IOP PUBLISHING LTD
- Keywords
- piezoelectric nanofiber; alignment of nanofibers; fiber stacking effect; effective radius of curvature; energy harvesting
- Citation
- NANOTECHNOLOGY, v.28, no.39
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOTECHNOLOGY
- Volume
- 28
- Number
- 39
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/19443
- DOI
- 10.1088/1361-6528/aa7f6b
- ISSN
- 0957-4484
- Abstract
- Well-ordered nanostructure arrays with controlled densities can potentially improve material properties; however, their fabrication typically involves the use of complicated processing techniques. In this work, we demonstrate a uniaxial alignment procedure for fabricating poly (vinylidene fluoride) (PVDF) electrospun nanofibers (NFs) by introducing collectors with additional steps. The mechanism of the observed NF alignment, which occurs due to the concentration of lateral electric field lines around collector steps, has been elucidated via finite-difference time-domain simulations. The membranes composed of well-aligned PVDF NFs are characterized by a higher content of the PVDF beta-phase, as compared to those manufactured from randomly orientated fibers. The piezoelectric energy harvester, which was fabricated by transferring well-aligned PVDF NFs onto flexible substrates with Ag electrodes attached to both sides, exhibited a 2-fold increase in the output voltage and a 3-fold increase in the output current as compared to the corresponding values obtained for the device manufactured from randomly oriented NFs. The enhanced piezoresponse observed for the aligned PVDF NFs is due to their higher beta-phase content, denser structure, smaller effective radius of curvature during bending, greater applied strain, and higher fraction of contributing NFs.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 신소재공학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/19443)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.