...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Materials >Probing the Domain Architecture in 2D α-Mo_2C via Polarized Raman Spectroscopy
【24h】

Probing the Domain Architecture in 2D α-Mo_2C via Polarized Raman Spectroscopy

机译：偏振拉曼光谱法研究二维α-Mo_2C中的畴结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

MXenes are emerging 2D materials with intriguing properties such as excellent stability and high conductivity. Here, a systematic study on the Raman spectra of 2D alpha-Mo2C (molybdenum carbide), a promising member in MXene family, is conducted. Six experimentally observed Raman modes from ultrathin alpha-Mo2C crystal are first assigned with the assistance of phonon dispersion calculated from density functional theory. Angle-resolved polarized Raman spectroscopy indicates the anisotropy of alpha-Mo2C in the b-c plane. Raman spectroscopy is further used to study the unique domain structures of 2D alpha-Mo2C crystals grown by chemical vapor deposition. A Raman mapping investigation suggests that most of the alpha-Mo2C flakes contain multiple domains and the c-axes of neighboring domains tend to form a 60 degrees or 120 degrees angle, due to the weak Mo-C bonds in this interstitial carbide and the low formation energy of the carbon chains along three equivalent directions. This study demonstrates that polarized Raman spectroscopy is a powerful and effective way to characterize the domain structures in alpha-Mo2C, which will facilitate the further exploration of the domain-structure-related properties and potential applications of alpha-Mo2C.
机译：MXene是新兴的2D材料，具有令人着迷的特性，例如出色的稳定性和高导电性。在这里，系统地研究了MXene系列中有希望的成员2D alpha-Mo2C（碳化钼）的拉曼光谱。首先借助根据密度泛函理论计算得出的声子色散，分配了六种实验观察到的超薄α-Mo2C晶体的拉曼模式。角分辨偏振拉曼光谱表明b-c平面中α-Mo2C的各向异性。拉曼光谱进一步用于研究通过化学气相沉积法生长的2Dα-Mo2C晶体的独特畴结构。拉曼作图研究表明，大多数α-Mo2C薄片包含多个畴，并且相邻畴的c轴趋向于形成60度或120度角，这是由于这种间隙碳化物中的Mo-C键较弱且碳链沿三个等效方向的形成能。这项研究表明，偏振拉曼光谱法是表征α-Mo2C中域结构的有力而有效的方法，这将有助于进一步探索与域结构相关的性质以及α-Mo2C的潜在应用。

著录项

  • 来源
    《Advanced Materials》 |2019年第8期|1807160.1-1807160.9|共9页
  • 作者

    Li Tianshu; Luo Weijun; Kitadai Hikari; Wang Xingzhi; Ling Xi;

  • 作者单位

    Boston Univ, Div Mat Sci & Engn, 15 St Marys St, Boston, MA 02215 USA;

    Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA;

    Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA;

    Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA;

    Boston Univ, Div Mat Sci & Engn, 15 St Marys St, Boston, MA 02215 USA|Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA|Boston Univ, Photon Ctr, 8 St Marys St, Boston, MA 02215 USA;

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

    2D crystals; alpha-Mo2C; in-plane anisotropy; Raman spectroscopy; transition metal carbides;

    机译：二维晶体;α-Mo2C;面内各向异性;拉曼光谱;过渡金属碳化物;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号