Ultralow k covalent organic frameworks enabling high fidelity signal transmission and high temperature electromechanical sensing DOI Creative Commons
Donglin Chen, Jin Sha,

Xudong Mei

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 30, 2024

As integrated circuits have developed towards the direction of complexity and miniaturization, there is an urgent need for low dielectric constant materials to effectively realize high-fidelity signal transmission. However, remains a challenge achieve ultralow loss over wide temperature range, not mention having excellent thermal conductivity processability concurrently. We herein prepare dual-linker freestanding covalent organic framework films with tailorable fluorine content via interfacial polymerization. The possesses (1.25 at 1 kHz, ≈1.2 6 G band), (0.0015 kHz) 0.48 Wm

Language: Английский

Heterogeneous layer-structured multiphase composite piezoelectret: Fabrication, piezoelectric performance, and application in electromechanical transduction DOI Creative Commons

Shi‐Yu Wu,

Xunlin Qiu,

Tiantian Gao

et al.

AIP Advances, Journal Year: 2025, Volume and Issue: 15(4)

Published: April 1, 2025

Piezoelectrets exhibit large piezoelectric sensitivity and high mechanical flexibility, widely employed in sensors, actuators, energy harvesters, etc. In this paper, a heterogeneous-structured multiphase composite piezoelectret (MPCP) was prepared using fluorinated ethylene propylene copolymer (Teflon FEP, 50 μm thickness), polydimethylsiloxane (PDMS), polypropylene (PP, 5.8 thickness) films via corona charging, high-temperature curing, layer stacking techniques. It is shown that the d33 coefficient of MPCP film reaches maximum value about 80 pC N−1 when surface potential FEP 1000 V thickness PDMS μm. The remains stable during two months storage under laboratory conditions. addition, unchanged over 22 000 cycles with sinusoidal driving force at frequency 2 Hz an amplitude 1 N. found strongly dependent on applied static pressure dynamic pressure. absence macroscopic air-filled cavities renders it excellent stability respect to varying environmental pressure, largely broadening its application scenarios. Due stability, sensing developed here shows promising for applications fields such as flexible health monitoring, human–computer interfaces,

Language: Английский

Citations

0
Self-powered highly stretchable ferroelectret nanogenerator towards intelligent sports DOI Creative Commons
Yiqin Wang, Xianfa Cai, Yufeng Guo

et al.

Nano Trends, Journal Year: 2024, Volume and Issue: unknown, P. 100053 - 100053

Published: Sept. 1, 2024

Language: Английский

Citations

1
Piezoelectret-Based Dual-Mode Flexible Pressure Sensor for Accurate Wrist Pulse Signal Acquisition in Health Monitoring DOI
Xunlin Qiu, Tiantian Gao, Peng Xu

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
Piezoelectret-based dual-mode flexible pressure sensor for accurate wrist pulse signal acquisition in health monitoring DOI
Tiantian Gao, Xunlin Qiu, Peng Xu

et al.

Measurement, Journal Year: 2024, Volume and Issue: unknown, P. 116283 - 116283

Published: Nov. 1, 2024

Language: Английский

Citations

0
Two-dimensional materials van der Waals assembly enabling scalable smart textiles DOI

Mengyu Du,

Ziqi Li, Lifeng Bian

et al.

Materials Science and Engineering R Reports, Journal Year: 2024, Volume and Issue: 163, P. 100915 - 100915

Published: Dec. 8, 2024

Language: Английский

Citations

0
Piezoelectret metamaterials with a double-V structure exhibiting tunable piezoelectric effect in a broad range DOI Creative Commons
Zhiming Shi, Qianqian Hu, Alexander A. Altmann

et al.

Journal of Applied Physics, Journal Year: 2024, Volume and Issue: 136(23)

Published: Dec. 18, 2024

Piezoelectret metamaterials are a kind of piezoelectrets with distinctive properties such as negative Poisson's ratio and positive piezoelectric d31 coefficient. These materials hold significant promise for applications in sensing mechanical energy harvesting. In this article, flexible piezoelectret simple double-V cell structure designed, their theoretically analyzed, simulated, experimentally tested. The results indicate that the effective d33 coefficients can be tuned over wide range by adjusting geometric parameters cell. experimental consistent theoretical prediction simulation calculation. Differing from coefficient, which always has polarity, sign coefficient depends on material. particular, ratio, while they have when is negative. For metamaterial sample prepared study, large up to 1200 pC/N achieved experimentally. effects well excellent adaptivity irregular surface structures, curved surfaces humanoid robots aircraft wings, introduce novel solution diverse applications.

Language: Английский

Citations

0
Ultralow k covalent organic frameworks enabling high fidelity signal transmission and high temperature electromechanical sensing DOI Creative Commons
Donglin Chen, Jin Sha,

Xudong Mei

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 30, 2024

As integrated circuits have developed towards the direction of complexity and miniaturization, there is an urgent need for low dielectric constant materials to effectively realize high-fidelity signal transmission. However, remains a challenge achieve ultralow loss over wide temperature range, not mention having excellent thermal conductivity processability concurrently. We herein prepare dual-linker freestanding covalent organic framework films with tailorable fluorine content via interfacial polymerization. The possesses (1.25 at 1 kHz, ≈1.2 6 G band), (0.0015 kHz) 0.48 Wm

Language: Английский

Citations

0