文献类型：期刊文献

英文题名：Ultralow k covalent organic frameworks enabling high fidelity signal transmission and high temperature electromechanical sensing

作者：Chen, Donglin[1];Sha, Juncheng[1];Mei, Xudong[2];Ye, An[3];Zhao, Zhengping[1];Qiu, Xunlin[2,4];Liu, Xiaoyun[1];Niu, Yueping[3];Zuo, Peiyuan[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Sch Phys, Shanghai, Peoples R China;[4]Shanghai Inst Aircraft Mech & Control, Shanghai, Peoples R China

年份：2024

卷号：15

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001386371400049)】；

基金：All authors are grateful for financial support from the National Natural Science Foundation of China (52373073 (QX.Z), 52303083 (PY.Z), 52073091 (QX.Z), 22171086 (XY.L), 12174102(XL.Q)), Shanghai Pujiang Program (22PJ1402500) (PY.Z), Shanghai Rising-Star Program (24QA2701800) (PY.Z), the Key Laboratory of Advanced Polymeric Materials of Shanghai and Shanghai Gaofeng Project for University Academic Program Development.

语种：英文

摘要：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, there remains a challenge to achieve ultralow dielectric constant and ultralow dielectric loss over a wide temperature range, not to mention having excellent thermal conductivity and processability concurrently. We herein prepare dual-linker freestanding covalent organic framework films with tailorable fluorine content via interfacial polymerization. The covalent organic framework possesses an ultralow dielectric constant (1.25 at 1 kHz, approximate to 1.2 at 6 G band), ultralow dielectric loss (0.0015 at 1 kHz) with a thermal conductivity of 0.48 Wm(-1)K(-1). We show high-fidelity signal transmission based on the large-sized (>15 cm(2)) COF films, far exceeding the most commercially available polyimide-based printed circuit board. In addition, the covalent organic framework also features excellent electret properties, which allows for active high-temperature electromechanical sensing. The electrode nanogenerator maintains 90% of the output voltage at 120 degrees C, outperforming the traditional fluorinated ethylene propylene electret. Collectively, this work paves the way for scalable application of ultralow dielectric constant covalent organic framework thin films in signal transmission and electromechanical sensing.