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2025 Vol.35, Issue 11 Preview Page

Research Paper

Electrohydrodynamic Instability-Induced Surface Structuring of Poly(vinylidene fluoride-trifluoroethylene) Films for Enhanced Dielectric Performance

전기수력 불안정성을 이용한 PVDF-TrFE 박막의 표면 구조체 형성 및 유전 특성 향상

Dongseong Lee1
,
Hyunje Park2†
이 동성1
,
박 현제2†
1Interdisciplinary Course of Physics and Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
2Department of Science Education, Jeonju University, Jeonju 55069, Republic of Korea
1성균관대학교 물리화학융합협동과정
2전주대학교 과학교육과
†Corresponding author E-Mail : lcb2017@jj.ac.kr (H. Park, Jeonju Univ.)
27 November 2025. pp. 539-545
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Abstract

Poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) is a promising ferroelectric polymer for flexible electronics and energy-harvesting devices, owing to its high piezoelectric coefficient and mechanical flexibility. Here, we report that electrohydrodynamic instability induces the formation of closely packed nanostructures on PVDF-TrFE thin film. Intriguingly, the strong electric field used in the fabrication process drives the polymeric fluid of PVDF-TrFE upwards to form the surface structures, facilitating molecular dipole alignment and crystalline ordering. This effect contributes to improved crystal alignment, as confirmed by enhanced X-ray diffraction and Raman characteristic peaks. The nanostructured PVDF-TrFE films exhibit enhanced dielectric properties including permittivity, dielectric loss, and ferroelectric polarization. Notably, P-E loop measurements showed a larger remnant polarization and higher saturation polarization in the nanostructured PVDF-TrFE films, indicating improved ferroelectric behavior. Our results suggest that the electrohydrodynamic instability provides a simple but effective route to simultaneously tailor the surface morphology, crystalline phase, and electrical performance of PVDF-TrFE films.

Keywords
electrohydrodynamic instability
surface structure
poly(vinylidene fluoride-co-trifluoroethylene)
dielectric performance
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 35
  • No :11
  • Pages :539-545
  • Received Date : 2025-10-10
  • Revised Date : 2025-10-24
  • Accepted Date : 2025-10-24
  • DOI :https://doi.org/10.3740/MRSK.2025.35.11.539
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