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Updated: Jul 19, 2025

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Preparation and Characterization of C60/Graphene Hybrid Nanostructures
Published on: May 15, 2018
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在加热后在平面内混合石墨烯/六边形化异构的结构演变
1Faculty of Aplied Science, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Viet Nam.
Journal of molecular graphics & modelling
|August 7, 2023
概括
分子动力学模拟显示,混合石墨烯/六角化 (h-BN) 异构结构在5500 K时经历一阶相变.增加h-BN含量降低了这种过渡温度,影响加热期间的结构演变.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算化学计算化学
背景情况:
- 结合石墨烯和六角化 (h-BN) 的混合异构结构提供了独特的电子和机械性能.
- 了解这些分层材料的热稳定性和相位过渡对于它们在先进电子和复合材料中的应用至关重要.
研究的目的:
- 在加热下研究平面内混合石墨烯/h-BN异构结构的结构演变和相位过渡行为.
- 为了确定h-BN层大小对热稳定性和相位过渡温度的影响.
主要方法:
- 用分子动力学 (MD) 模拟来建模石墨烯/h-BN/石墨烯异构结构.
- 使用特索夫电位来模拟从50K到7500K的加热.
- 计算了热动态量,包括协调数,总能量,热容量和环分布.
主要成果:
- 在5500K观察到从晶体到液态的第一阶段过渡,这表明每个原子的总能量突然增加.
- 热容量分析显示了两个峰值:一个在5500K (晶体转化为液体) 和另一个在6300K (气态B和N原子的形成).
- 阶段过渡温度随着h-BN在异构结构中的比例增加而下降,尽管过渡仍然是第一阶段的.
结论:
- 混合石墨烯/h-BN异构在加热时表现出明显的相变,在特定的温度下发生显著的结构变化.
- 组成,特别是h-BN的相对量,在确定热稳定性和过渡温度方面发挥着关键作用.
- 这些发现为设计和利用基于石墨烯-h-BN的材料在高温应用中提供了宝贵的见解.
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