Key Laboratory of Micro- and Nano-scale Boron Nitride Materials of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin (China).
Institute of New-Energy Materials, Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072 (China).
Angew Chem Int Ed Engl. 2015 Jun 8;54(24):7051-4. doi: 10.1002/anie.201502023. Epub 2015 Apr 29.
Cubic boron nitride (c-BN) is a super-hard material whose hardness increases dramatically with decreasing size. However, c-BN nanoparticles (NPs) with sizes less than 10 nm have never been obtained. Herein we report a simple strategy towards the synthesis of ultrafine c-BN NPs with an average size of 3.5 nm. The method, under ambient conditions, exploits a laser-induced photochemical effect and employs dioxane solution of ammonia borane (AB) as a liquid target. Meanwhile, total dehydrogenation of AB is realized by laser irradiation. Therefore, this approach shows great potential for the preparation of super-hard NPs as well as controllable dehydrogenation.
立方氮化硼（c-BN）是一种超硬材料，其硬度随尺寸的减小而急剧增加。然而，尺寸小于 10nm 的 c-BN 纳米颗粒（NPs）从未被获得过。在此，我们报告了一种在环境条件下合成平均尺寸为 3.5nm 的超细 c-BN NPs 的简单策略。该方法利用激光诱导的光化学反应，并采用氨硼烷（AB）的二氧六环溶液作为液体靶材。同时，激光辐照实现了 AB 的完全脱氢。因此，这种方法在制备超硬纳米颗粒以及可控脱氢方面具有很大的潜力。
