Ultrasmooth nanocrystalline carbon film induced by low concentration doping: Carbide disorienting graphene nanocrystallite
Ultrasmooth nanocrystalline carbon film induced by low concentration doping: Carbide disorienting graphene nanocrystallite
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低浓度掺杂诱导的超光滑纳米晶碳膜：碳化物迷失石墨烯纳米微晶
DOI：
10.1016/j.carbon.2019.11.090
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发表时间：
2020-03
期刊：
影响因子：
10.9
通讯作者：
Diao Dongfeng
中科院分区：
文献类型：
--
作者：
Chen Cheng;Fan Xue;Diao Dongfeng
纳米晶薄膜的制备过程中往往伴随着不希望有的表面粗糙化，这限制了纳米晶薄膜在摩擦学、光学和电子学等领域的应用。在这里，我们报告了一种技术，以减少平均粗糙度的石墨烯纳米晶碳膜从18.3 nm到0.66 nm的0.55at.%钛掺杂Ti掺杂的石墨烯纳米晶碳膜的表面从几纳米厚到1 μm厚都保持超光滑。基于纳米结构表征，解释了Ti掺杂导致Ti-C键的形成，并使石墨烯纳米微晶的生长由垂直取向转变为无规取向的超光滑机制。超光滑机制是普遍的，如通过与Si、Al、Cr、Zr和W的低浓度掺杂的类似效果所示。这种方法为制备超光滑纳米晶碳膜而不需要离子冲击诱导的下坡电流铺平了道路，并显着提高了石墨烯纳米晶碳膜的硬度。
The fabrication of nanocrystalline films is usually accompanied by undesired surface roughening, which limits their applications in tribology, optics and electronics. Here, we report a technique to reduce the average roughness of graphene nanocrystalline carbon film from 18.3 nm to 0.66 nm by ∼5 at.% Ti-doping. The surface of the Ti-doped graphene nanocrystalline carbon film stay ultrasmooth from few nanometer thick up to 1 μm thick. Based on the nanostructure characterization, the ultrasmooth mechanism is interpreted that Ti-doping leads to the formation of Ti–C bond, and changes the growth of graphene nanocrystallite from preferred vertical-aligned orientation to random orientation. The ultrasmooth mechanism is general, as shown by similar effects with low concentration doping of Si, Al, Cr, Zr and W. This approach paves a way for fabricating ultrasmooth nanocrystalline carbon films without a requirement of ion-impact-induced downhill current, and significantly improving the hardness of the graphene nanocrystalline carbon film.
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DOI：
10.1088/0953-8984/11/1/015
发表时间：
1999-01
期刊：
Journal of Physics: Condensed Matter
影响因子：
--
作者：
Xihang Shi;L. K. Cheah;J. R. Shi;Zhili Sun;B. Tay
通讯作者：
Xihang Shi;L. K. Cheah;J. R. Shi;Zhili Sun;B. Tay
碳膜生长过程中低能电子激发对石墨烯纳米微晶形成的影响
影响因子：
4
作者：
Chen Wencong;Zhang Xi;Diao Dongfeng
通讯作者：
Diao Dongfeng
影响因子：
19
作者：
O. Wilhelmsson;M. Råsander;Mattias Carlsson;E. Lewin;B. Sanyal;U. Wiklund;O. Eriksson;U. Jansson
通讯作者：
O. Wilhelmsson;M. Råsander;Mattias Carlsson;E. Lewin;B. Sanyal;U. Wiklund;O. Eriksson;U. Jansson
影响因子：
3.7
作者：
Ferrari, AC;Robertson, J
通讯作者：
Robertson, J
影响因子：
5.4
作者：
Peidong Xue;Lei Yang;Dong-feng Diao
通讯作者：
Peidong Xue;Lei Yang;Dong-feng Diao