2020/03/13 by Shichen Deng, Deng, Shichen, Jiale Yuan +15
Materials Science · #Advanced Thermoelectric Materials and Devices #FOS: Physical sciences #Ferroelectric and Piezoelectric Materials #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Thermal properties of materials
paper · pdf · doi:10.48550/arxiv.2003.06070
openalex publication_date 2020/03/13 · openalex created_date 2020/12/07 · openalex updated_date 2026/08/01
Phonon engineering focuses on heat transport modulation on atomic-scale. Different from reported methods, it is shown that electric field can also modulate heat transport in ferroelectric polymers, poly(vinylidene fluoride), by both simulation and measurement. Interestingly, thermal conductivities of poly(vinylidene fluoride) array can be enhanced by a factor of 3.25 along the polarization direction by simulation. The semi-crystalline poly(vinylidene fluoride) film can be also enhanced by a factor of 1.5 which is found by both simulation and measurement. The morphology and phonon property analysis reveal that the enhancement arises from the higher inter-chain lattice order, stronger inter-chain interaction, higher phonon group velocity and suppressed phonon scattering. This study offers a new modulation strategy with quick response and without fillers.