Tijent Fatima Z, Bouzourâa Montassar B, Ottapilakkal Vishnu, Perepeliuc Andre, Gujrati Rajat, Vuong Phuong, Sundaram Suresh, Faqir Mustapha, Voss Paul L, Salvestrini Jean-Paul, Ougazzaden Abdallah
CNRS, Georgia Tech - CNRS IRL 2958, 2 rue Marconi, Metz, 57070, France.
Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, 30332-0250, USA.
Small. 2024 Dec;20(52):e2406794. doi: 10.1002/smll.202406794. Epub 2024 Oct 14.
Hexagonal boron nitride (h-BN) bubbles are of significant interest to micro-scale hydrogen storage thanks to their ability to confine hydrogen gas molecules. Previous reports of h-BN bubble creation from grown h-BN films require electron beams under vacuum, making integrating with other experimental setups for hydrogen production impractical. Therefore, in this study, the formation of h-BN bubbles is demonstrated in a 20 nm h-BN film grown on a sapphire substrate with a 213 nm UV laser beam. Using atomic force microscopy, it is shown that longer illumination time induces larger h-BN bubbles up to 20 µm with higher density. It is also demonstrated that h-BN bubbles do not collapse for more than 6 months after their creation. The internal pressure and gravimetric storage capacity of h-BN bubbles are reported. A maximum internal pressure of 41 MPa and a gravimetric storage capacity of 6% are obtained. These findings show that h-BN bubbles can be a promising system for long-term hydrogen storage.
六方氮化硼（h-BN）气泡因其能够限制氢气分子而在微尺度储氢方面备受关注。此前关于从生长的h-BN薄膜中产生h-BN气泡的报道需要在真空中使用电子束，这使得与其他制氢实验装置集成变得不切实际。因此，在本研究中，使用213纳米的紫外激光束在蓝宝石衬底上生长的20纳米h-BN薄膜中展示了h-BN气泡的形成。通过原子力显微镜表明，较长的光照时间会诱导出更大的h-BN气泡，直径可达20微米，且密度更高。还证明了h-BN气泡在产生后6个多月内不会坍塌。报告了h-BN气泡的内部压力和重量储存容量。获得了41兆帕的最大内部压力和6%的重量储存容量。这些发现表明，h-BN气泡可能是一种有前途的长期储氢系统。
