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25 September 2022
 
  » arxiv » 1503.2804

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Synthesis of large single-crystal hexagonal boron nitride grains on Cu-Ni alloy
Guangyuan Lu ; Tianru Wu ; Qinghong Yuan ; Huishan Wang ; Haomin Wang ; Feng Ding ; Xiaoming Xie ; Mianheng Jiang ;
Date 10 Mar 2015
AbstractHexagonal boron nitride (h-BN) has attracted significant attention due to its superior properties as well as its potential as an ideal dielectric layer for graphene-based devices. The h-BN films obtained via chemical vapor deposition in earlier reports are always polycrystalline with small grains due to high nucleation density on substrates. Here we report the successful synthesis of large single-crystal h-BN grains on rational designed Cu-Ni alloy foils. It is found that the nucleation density can be greatly reduced to 60 per mm2 by optimizing Ni ratio in substrates. The strategy enables the growth of single-crystal h-BN grains up to 7,500 um2, about 2 orders larger than that in previous reports. This work not only provides valuable information for understanding h-BN nucleation and growth mechanisms, but also gives an effective alternative to exfoliated h-BN as a high-quality dielectric layer for large-scale nano-electronic applications.
Source arXiv, 1503.2804
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