Publications
1.
Fang, Lichen; Li, Jing; Zhu, Zeyu; Orrego, Santiago; Kang, Sung Hoon
Piezoelectric polymer thin films with architected cuts Journal Article
In: Journal of Materials Research, vol. 33, no. 3, pp. 330-342, 2018, (Invited article on Focus Issue on Architected Materials).
@article{Fang2018,
title = {Piezoelectric polymer thin films with architected cuts},
author = {Lichen Fang and Jing Li and Zeyu Zhu and Santiago Orrego and Sung Hoon Kang},
editor = {Lorenzo Valdevit, Katia Bertoldi, James Guest, Christopher Spadaccini},
url = {https://www.cambridge.org/core/journals/journal-of-materials-research/article/piezoelectric-polymer-thin-films-with-architected-cuts/41109CD493CBADDE85D9446FCE3A95A7},
doi = {10.1557/jmr.2018.6},
year = {2018},
date = {2018-02-14},
journal = {Journal of Materials Research},
volume = {33},
number = {3},
pages = {330-342},
abstract = {Introducing architected cuts is an attractive and simple approach to tune mechanical behaviors of planar materials like thin films for desirable or enhanced mechanical performance. However, little has been studied on the effects of architected cuts on functional materials like piezoelectric materials. We investigated how architected cut patterns affect mechanical and piezoelectric properties of polyvinylidene fluoride thin films by numerical, experimental, and analytical studies. Our results show that thin films with architected cuts can provide desired mechanical features like enhanced compliance, stretchability, and controllable Poisson’s ratio and resonance frequency, while maintaining piezoelectric performance under static loadings. Moreover, we could observe maximum ∼30% improvement in piezoelectric conversion efficiency under dynamic loadings and harvest energy from low frequency (<100 Hz) mechanical signals or low velocity (<5 m/s) winds, which are commonly existing in ambient environment. Using architected cuts doesn't require changing the material or overall dimensions, making it attractive for applications in self-powered devices with design constraints.},
note = {Invited article on Focus Issue on Architected Materials},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Introducing architected cuts is an attractive and simple approach to tune mechanical behaviors of planar materials like thin films for desirable or enhanced mechanical performance. However, little has been studied on the effects of architected cuts on functional materials like piezoelectric materials. We investigated how architected cut patterns affect mechanical and piezoelectric properties of polyvinylidene fluoride thin films by numerical, experimental, and analytical studies. Our results show that thin films with architected cuts can provide desired mechanical features like enhanced compliance, stretchability, and controllable Poisson’s ratio and resonance frequency, while maintaining piezoelectric performance under static loadings. Moreover, we could observe maximum ∼30% improvement in piezoelectric conversion efficiency under dynamic loadings and harvest energy from low frequency (<100 Hz) mechanical signals or low velocity (<5 m/s) winds, which are commonly existing in ambient environment. Using architected cuts doesn’t require changing the material or overall dimensions, making it attractive for applications in self-powered devices with design constraints.
Note: Send e-mail to Prof. Kang at [email protected] if you need a pdf file of the papers below.
2018
Fang, Lichen; Li, Jing; Zhu, Zeyu; Orrego, Santiago; Kang, Sung Hoon
Piezoelectric polymer thin films with architected cuts Journal Article
In: Journal of Materials Research, vol. 33, no. 3, pp. 330-342, 2018, (Invited article on Focus Issue on Architected Materials).
Abstract | Links | BibTeX | Tags: architected materials, Auxetic, energy harvesting, kirigami, mechanical metamaterial, piezoelectric, stretchable electronics, wind energy
@article{Fang2018,
title = {Piezoelectric polymer thin films with architected cuts},
author = {Lichen Fang and Jing Li and Zeyu Zhu and Santiago Orrego and Sung Hoon Kang},
editor = {Lorenzo Valdevit, Katia Bertoldi, James Guest, Christopher Spadaccini},
url = {https://www.cambridge.org/core/journals/journal-of-materials-research/article/piezoelectric-polymer-thin-films-with-architected-cuts/41109CD493CBADDE85D9446FCE3A95A7},
doi = {10.1557/jmr.2018.6},
year = {2018},
date = {2018-02-14},
journal = {Journal of Materials Research},
volume = {33},
number = {3},
pages = {330-342},
abstract = {Introducing architected cuts is an attractive and simple approach to tune mechanical behaviors of planar materials like thin films for desirable or enhanced mechanical performance. However, little has been studied on the effects of architected cuts on functional materials like piezoelectric materials. We investigated how architected cut patterns affect mechanical and piezoelectric properties of polyvinylidene fluoride thin films by numerical, experimental, and analytical studies. Our results show that thin films with architected cuts can provide desired mechanical features like enhanced compliance, stretchability, and controllable Poisson’s ratio and resonance frequency, while maintaining piezoelectric performance under static loadings. Moreover, we could observe maximum ∼30% improvement in piezoelectric conversion efficiency under dynamic loadings and harvest energy from low frequency (<100 Hz) mechanical signals or low velocity (<5 m/s) winds, which are commonly existing in ambient environment. Using architected cuts doesn't require changing the material or overall dimensions, making it attractive for applications in self-powered devices with design constraints.},
note = {Invited article on Focus Issue on Architected Materials},
keywords = {architected materials, Auxetic, energy harvesting, kirigami, mechanical metamaterial, piezoelectric, stretchable electronics, wind energy},
pubstate = {published},
tppubtype = {article}
}
Introducing architected cuts is an attractive and simple approach to tune mechanical behaviors of planar materials like thin films for desirable or enhanced mechanical performance. However, little has been studied on the effects of architected cuts on functional materials like piezoelectric materials. We investigated how architected cut patterns affect mechanical and piezoelectric properties of polyvinylidene fluoride thin films by numerical, experimental, and analytical studies. Our results show that thin films with architected cuts can provide desired mechanical features like enhanced compliance, stretchability, and controllable Poisson’s ratio and resonance frequency, while maintaining piezoelectric performance under static loadings. Moreover, we could observe maximum ∼30% improvement in piezoelectric conversion efficiency under dynamic loadings and harvest energy from low frequency (<100 Hz) mechanical signals or low velocity (<5 m/s) winds, which are commonly existing in ambient environment. Using architected cuts doesn’t require changing the material or overall dimensions, making it attractive for applications in self-powered devices with design constraints.