التفاصيل البيبلوغرافية
| العنوان: |
Direct measurement of tensile mechanical properties of few-layer hexagonal boron nitride (h-BN). |
| المؤلفون: |
Zhou, Jingzhuo1 (AUTHOR), Zhu, Mengya1 (AUTHOR), Han, Ying1 (AUTHOR), Zhou, Xuefeng2 (AUTHOR), Wang, Shanmin2 (AUTHOR), Chen, Juzheng1 (AUTHOR), Wu, Hao1 (AUTHOR), Hou, Yuan1,3 (AUTHOR) yuanhou23@gmail.com, Lu, Yang3 (AUTHOR) ylu1@hku.hk |
| المصدر: |
Journal of Applied Physics. 6/14/2024, Vol. 135 Issue 22, p1-7. 7p. |
| مصطلحات موضوعية: |
*YOUNG'S modulus, *TENSILE tests, *DIELECTRIC properties, *THERMAL conductivity, *COVALENT bonds, *BORON nitride |
| مستخلص: |
Hexagonal boron nitride (h-BN) has excellent thermal conductivity and dielectric properties, which shows great potential for low-dimensional devices. However, mechanical properties of h-BN have not been comprehensively investigated through experiments. In this work, we conduct in situ direct tensile tests on freestanding single-crystal few-layer h-BN nanosheets with various layer numbers from 3 to 8, with an elaborate sample transfer and characterization protocol. Young's modulus of 573.8 ± 101.4 GPa and a tensile fracture strain up to 3.2% are revealed, which are comparable to its monolayer counterpart. Moreover, we find a tough-to-brittle transition in few-layer h-BN with the increase in layer number, which is attributed the interplay between the van der Waals interaction and in-plane covalent bonding. These findings could open up new possibilities in mechanical research of van der Waals materials and provide guidance for the design of h-BN-based devices and composites. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |