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Lateral size selection of liquid exfoliated hexagonal boron nitride nanosheets

机译:液体剥落的六边形硼氮化物纳米液的横向尺寸选择

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摘要

Hexagonal boron nitride (h-BN) is of great importance in imaging, thermal and quantum applications in the mid-infrared regions (most of which are size related) for its natural hyperbolic properties. Liquid exfoliation is a promising production approach, however it is limited by the wide range of nanosheet length and thickness. Here we demonstrate a simple and effective method to sort the exfoliated nanosheets according to their lateral sizes. The process uses a combination of low-rate and high-rate configurations to separate the lateral lengths ranging from 1 to 3 mm. In contrast to Raman spectroscopy, infrared results exhibit intensive dependence on the nanosheet length, where the E-1u phonon frequency and intensity ratio of E-1u to A(2u) modes are significantly sensitive to the nanosheet length owing to the large anisotropy between the in-plane and out-of-plane axes.
机译:六边形氮化物(H-BN)在中红外区域(大部分是尺寸相关)的成像,热量和量子应用方面具有重要意义,用于其天然双曲性质。 液体去角质是一种有前途的生产方法,但它受到广泛范围的纳米片长度和厚度的限制。 在这里,我们展示了一种简单有效的方法,可以根据其横向尺寸对剥离的纳米表进行排序。 该过程使用低速率和高速配置的组合来分离1至3mm的横向长度。 与拉曼光谱学相比,红外结果表现出对纳米片长度的密集依赖性,其中E-1U声子频率和E-1U的强度比(2U)模式的频率和强度比在纳米晶片长度上显着敏感,因为由于纳米电位 面内和平面外轴。

著录项

  • 来源
    《RSC Advances》 |2018年第11期|共8页
  • 作者

    Gao Wei; Zhao Yan; Yin Hong;

  • 作者单位

    Jilin Univ State Key Lab Superhard Mat Qianjin St 2699 Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Superhard Mat Qianjin St 2699 Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Superhard Mat Qianjin St 2699 Changchun 130012 Jilin Peoples R China;

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

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