Peeling-induced interfacial roughness and charging for enhanced triboelectric power generation

作     者：Jin, Da Woon Ahn, Hyun Soo Kumar, Dheeraj Lee, Joo Hyeong Kim, Min Su Eom, Yushin Youk, Ji Ho Singh, Huidrom Hemojit Kim, Jong Hun Jung, Jong Hoon 

作者机构：Department of Physics Inha University Incheon 22212 South Korea Program in Semiconductor Convergence Inha University Incheon 22212 South Korea Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy and Materials Inha University Incheon 22212 South Korea Department of Physics Gauhati University Assam 781014 India 

出 版 物：《Nano Trends》 (Nano. Trends.)

年 卷 期：2024年第8卷

基　　金：Inha University, Inha National Research Foundation of Korea, NRF, (RS-2023-00207828, NRF-2023R1A2C1004159) National Research Foundation of Korea, NRF Ministry of Education, MOE, (RS-2023-00238228) Ministry of Education, MOE 

主　　题：Enhanced triboelectric output Interfacial charging Interfacial roughness Peeling-off 

摘      要：To date, there have been a lot of efforts to enhance the conversion efficiency of triboelectric nanogenerators (TENGs) via physical and chemical modifications of the polymer surface. Herein, we report that a facile peeling of polymer from a substrate can enhance the triboelectric power output. The peeling of spin-coated polydimethylsiloxane (PDMS) from glass and polytetrafluoroethylene (PTFE) substrates has revealed a considerable increase in interfacial roughness and lateral friction. Surface-sensitive X-ray photoemission spectroscopy and non-contact current measurements have also revealed the transfer of counter-material and interfacial charging. The surface roughness of peeled PDMS is significant for the PTFE substrate, while the surface charge is significant for the glass substrate. The triboelectric output power density for peeled PDMS from the substrate is similar, 10.3 µW/cm2, but significantly larger than that for as-grown PDMS (2.2 µW/cm2). The peeling strength of PDMS significantly increases for glass compared to PTFE after the oxygen plasma treatment of substrates. The triboelectric charge of peeled PDMS from a plasma-treated glass substrate is almost 1.3 times larger than that from a PTFE substrate. This work implies that peeling polymer from a rough substrate with a large adhesion force would be a facile and effective way to increase the triboelectric power output, without any delicate surface treatments. © 2024 The Authors