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Publikācija: Contact Electrification between Identical Polymers as the basis for Triboelectric/Flexoelectric Materials

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Research project
Defending: ,
Publication language English (en)
Title in original language Contact Electrification between Identical Polymers as the basis for Triboelectric/Flexoelectric Materials
Field of research 2. Engineering and technology
Sub-field of research 2.10 Nano-technology
Research platform Materials, Processes, and Technologies
Authors Andris Šutka
Kaspars Mālnieks
Linards Lapčinskis
Martin Timusk
Kaspars Kalniņš
Andrejs Kovaļovs
Juris Bitenieks
Māris Knite
Daniel Stevens
Jaime Grunlan
Keywords
Abstract Polymer contact electrification offers the possibility to harvest mechanical energy using lightweight, flexible and low-cost materials, but the mechanism itself is still unresolved. Several recent studies confirm heterolytic covalent bond breaking as the mechanism for surface charge formation. Here it is shown that the reason for the formation of surface charge by contacting two identical polymers results from the fluctuation in the surface irregularities, and that contacted materials with a greater porosity or surface roughness differential result in a greater generation of surface charge. Porosity and surface roughness create uneven surface length percentage changes in the lateral direction during deformation, which changes the charge density across the surface during relaxation. Multilayered membranes exhibit flexoelectric properties upon pressing and releasing by generating charge without separating individual membrane layers. This new insight deepens the understanding of polymer contact electrification and highlights better ways to prepare triboelectric or flexoelectric nanogenerator devices.
DOI: 10.1039/D0CP01947J
Hyperlink: https://pubs.rsc.org/en/content/articlelanding/2020/CP/D0CP01947J#!divAbstract 
Reference Šutka, A., Mālnieks, K., Lapčinskis, L., Timusk, M., Kalniņš, K., Kovaļovs, A., Bitenieks, J., Knite, M., Stevens, D., Grunlan, J. Contact Electrification between Identical Polymers as the basis for Triboelectric/Flexoelectric Materials. Physical Chemistry Chemical Physics, 2020, Vol. 22, No. 23, pp.13299-13305. ISSN 1463-9076. e-ISSN 1463-9084. Available from: doi:10.1039/D0CP01947J
ID 31026