Effect of contact number among graphene nanosheets on the conductivities of tunnels and polymer composites

Yasser Zare; Tae-Hoon Kim; Nima Gharib; Young-Wook Chang

doi:10.1038/s41598-023-36669-1

Effect of contact number among graphene nanosheets on the conductivities of tunnels and polymer composites

Sci Rep. 2023 Jun 12;13(1):9506. doi: 10.1038/s41598-023-36669-1.

Authors

Yasser Zare¹, Tae-Hoon Kim², Nima Gharib³, Young-Wook Chang⁴

Affiliations

¹ Biomaterials and Tissue Engineering Research Group, Department of Interdisciplinary Technologies, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran. y.zare@aut.ac.ir.
² Department of Materials Science & Chemical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University ERICA, Ansan, 15588, Korea.
³ College of Engineering and Technology, American University of the Middle East, 54200, Egaila, Kuwait.
⁴ Department of Materials Science & Chemical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University ERICA, Ansan, 15588, Korea. ywchang@hanyang.ac.kr.

Abstract

Simple equations are expressed for tunnel conductivity, tunnel resistance and conductivity of a graphene-filled composite by the number of contacts and interphase part. More specially, the active filler amount is suggested by interphase depth, which changes the contact number. The conductivity of nanocomposite is presented by filler content, filler dimensions, tunneling length and interphase depth. The innovative model is surveyed by the experimented conductivity of real examples. Too, the impacts of numerous issues on the tunnel resistance, tunnel conductivity and conductivity of nanocomposite are discussed to validate the novel equations. The estimates agree with the experimented data and the impacts of several terms on the tunnel resistance, tunnel conductivity and conductivity of system are sensible. Thin and big nanosheets positively affect the nanocomposite's conductivity, but thick nanosheets improve the tunnel conductivity. High conductivity is found at short tunnels, while the nanocomposite's conductivity directly depends on the tunneling length. The dissimilar effects of these features on the tunneling properties and conductivity are described.