Stretchable Self-Healing Polymeric Dielectrics Cross-Linked Through Metal–Ligand Coordination

• DOI: 10.1021/jacs.6b02428
• Publication Date: 2016-04-21T09:24:21Z
• Authors: Ying-Li Rao; Alex Chortos; Raphael Pfattner; Franziska Lissel; Yu-Cheng Chiu; Vivian Feig; Jie Xu; Tadanori Kurosawa; Xiaodan Gu; Chao Wang; Mingqian He; Jong Won Chung; Zhenan Bao
• Keywords: Polydimethylsiloxane; Bipyridine

A self-healing dielectric elastomer is achieved by the incorporation of metal-ligand coordination as cross-linking sites in nonpolar polydimethylsiloxane (PDMS) polymers. The ligand 2,2'-bipyridine-5,5'-dicarboxylic amide, while metal salts investigated here are Fe(2+) and Zn(2+) with various counteranions. kinetically labile between bipyridine endows polymer fast ability at ambient condition. When integrated into organic field-effect transistors (OFETs) gate dielectrics, FeCl2 ZnCl2 cross-linked PDMS exhibited increased constants compared to demonstrated hysteresis-free transfer characteristics, owing low ion conductivity strong columbic interaction cations small Cl(-) anions which can prevent mobile drifting under bias. Fully stretchable FeCl2-PDMS dielectrics were fabricated ideal characteristics. leakage current remained even after 1000 cycles 100% strain. mechanical robustness stable electrical performance proved its suitability for applications electronics. On other hand, containing large-sized (BF4(-), ClO4(-), CF3SO3(-)) displayed prominent hysteresis due bias voltage. This work provides insights on future design materials based