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Porous CY carbon: a new semiconducting phase with an sp(1)-sp(2)-sp(3) bonding network

机译:多孔Cy Carbon:具有SP(1)-SP(2)-SP(3)键合网络的新半导体相

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摘要

A new carbon allotrope consisting of 16 atoms in an orthorhombic cell with a porous structure and displaying an Imma symmetry (termed as CY carbon) with a low mass density of 2.27 g cm(-3) was identified by first-principle calculations. The new carbon phase had an sp(1)-sp(2)-sp(3) network. Phonon dispersion confirmed that the allotrope was dynamically stable, whereas the elastic constants implied its mechanical stability. Analysis of the electronic band structure showed that this new carbon crystal was a direct semiconductor. The X-ray diffraction patterns and Raman spectra of the material were also simulated for the future experimental characterizations. A peak of 591 cm(-1) in the Raman spectrum revealed that a low-frequency feature can also exist in other carbon crystals besides just amorphous carbon. Due to the direct gap and porous character with low mass density, this new 3D porous semiconducting carbon allotrope may possess potential not only in electronic and optical applications but also in gas absorption applications.
机译:通过第一原理计算鉴定了一种具有多孔结构和显示具有低质量密度的正质量和呈低质量密度(称为CY碳)的新碳异构体。新的碳阶段具有SP(1)-SP(2)-SP(3)网络。声子分散证实,同性恋是动态稳定的,而弹性常数暗示其机械稳定性。电子频带结构的分析表明,这种新的碳晶体是直接半导体。还模拟了该材料的X射线衍射图案和拉曼光谱以用于未来的实验表征。拉曼光谱中的591cm(-1)的峰显示出除了非晶碳之外,其他碳晶体也可以存在低频特征。由于具有低质量密度的直接间隙和多孔特性,这种新的3D多孔半导体碳异滴料可能具有不仅具有电子和光学应用的潜力,而且具有气体吸收应用。

著录项

  • 来源
    《RSC Advances》 |2016年第113期|共5页
  • 作者

    Zhu Xi; Wang Min;

  • 作者单位

    Nanyang Technol Univ Sch Mat Sci &

    Engn Div Mat Sci 50 Nanyang Ave Singapore 639798 Singapore;

    Southwest Univ Fac Mat &

    Energy Inst Clean Energy &

    Adv Mat Chongqing 400715 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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