The high thermal conductivity of graphene prevents ZnO nanorod-graphene interface from degradation

0572162 - ÚFE 2024 RIV GB eng J - Journal Article
Tiagulskyi, Stanislav - Černohorský, Ondřej - Bašinová, Nikola - Yatskiv, Roman - Grym, Jan
The high thermal conductivity of graphene prevents ZnO nanorod-graphene interface from degradation.
Materials Research Bulletin. Roč. 164, AUG 2023 (2023), č. článku 112286. ISSN 0025-5408. E-ISSN 1873-4227
R&D Projects: GA ČR(CZ) GA20-24366S
Institutional support: RVO:67985882
Keywords : nanostructures * chemical synthesis * electron microscopy * electrical properties * thermal conductivity
OECD category: Materials engineering
Impact factor: 5.4, year: 2022
Method of publishing: Limited access

The electrical and thermal properties of the junction between individual ZnO nanorods and conductive elec-trodes are investigated. It is demonstrated that a stable ohmic contact can be prepared between ZnO nanorods and graphene by eliminating contamination on the graphene surface by local Joule heating. Moreover, it is shown that, for conventional metal electrodes, such as copper, Joule self-heating forms hot spots and subse-quently causes thermal damage to the ZnO nanorod near the interface. This issue can be eliminated in graphene contacts because of their excellent thermal conductivity. The experimental results are validated by the numerical modeling of heat dissipation near the ZnO/graphene interface using COMSOL Multiphysics software. To char-acterize the interface between individual nanorods and graphene, a novel technique was developed using a nanomanipulator in the chamber of the scanning electron microscope. In contrast to conventional approaches, the method eliminates the use of extensive processing chemistry and allows observation of morphological changes in situ when performing electrical characterization.
Permanent Link: https://hdl.handle.net/11104/0345175