Tribological Characteristics of Single-Layer h-BN Measured by Colloidal Probe Atomic Force Microscopy
| Autor: | Koo-Hyun Chung, Tien Van Tran |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
wear
Materials science friction 02 engineering and technology Nitride engineering.material 010402 general chemistry 01 natural sciences symbols.namesake Coating Materials Chemistry hexagonal-boron nitride (h-BN) Lubricant Composite material Normal force atomic force microscopy Surfaces and Interfaces Tribology Orders of magnitude (numbers) 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films lcsh:TA1-2040 engineering symbols 0210 nano-technology Raman spectroscopy lcsh:Engineering (General). Civil engineering (General) Layer (electronics) |
| Zdroj: | Coatings, Vol 10, Iss 530, p 530 (2020) Coatings Volume 10 Issue 6 |
| ISSN: | 2079-6412 |
| Popis: | The tribological characteristics of single-layer (1L) hexagonal-boron nitride (h-BN) were systematically investigated using colloidal probe atomic force microscopy, with an aim to elucidate the feasibility as a protective coating layer and solid lubricant for micro- and nanodevices. The experiments were performed to detect the occurrence of failure of 1L h-BN for up to 10,000 cycles under various normal forces. The failure of 1L h-BN did not occur for 10,000 cycles under a 10 &mu N normal force, corresponding to a contact pressure of about 0.34 GPa. However, the complete failure of 1L h-BN occurred faster with an increasing normal force from 20 to 42 &mu N. It was observed that the SiO2/Si substrate was locally exposed due to defect formation on the 1L h-BN. The Raman spectroscopy measurement results further suggest that the failure was associated with the compressive strain on 1L h-BN. The friction of 1L h-BN before failure was orders of magnitude smaller than that of a SiO2/Si substrate. The overall results indicate the feasibility of atomically thin h-BN as a protective coating layer and solid lubricant. In particular, the results of this work provide fundamental tribological characteristics of pristine h-BN as a guide, which may be helpful in other practical deposition methods for atomically thin h-BN with enhanced tribological characteristics. |
| Databáze: | OpenAIRE |
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