相关实验视频

Updated: Oct 12, 2025

Fabrication of 3D Carbon Microelectromechanical Systems C-MEMS

Fabrication of 3D Carbon Microelectromechanical Systems C-MEMS

Published on: June 17, 2017

来自缩富勒烯的超硬散装无形碳

Yuchen Shang¹, Zhaodong Liu^1,2, Jiajun Dong¹

¹State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China.

|November 25, 2021

概括

研究人员合成了透明的,几乎纯粹的sp3无形碳, 这种无形碳合成的突破为先进应用打开了大门.

科学领域:

材料科学
固态物理
纳米技术

背景情况:

无形材料保留了晶体的秩序,提供了独特的特性.
有 sp2 或混合 sp2-sp3 杂交的无形碳在技术上是相关的.
合成高sp3度的无形碳是一项挑战.

研究的目的:

在毫米大小的样本中合成透明,几乎纯的sp3无形碳.
为了研究这种新型无形碳材料的特性.
探索大量sp3无形碳的潜在应用.

主要方法:

在塌边界附近的压力下加热富勒.
合成材料的结构和特性.
高压和高温合成技术

主要成果:

成功合成了毫米大小的透明,几乎纯粹的sp3无形碳.
材料呈现出类似钻石的短/中距离顺序.
实现了无形材料的最高硬度 (101.9 GPa),弹性模量 (1,182 GPa) 和热导率 (26.0 W m-1 K-1).
可调节的光学带隙从1.85 eV到2.79 eV.

结论:

这项研究促进了大量无形材料的理解和合成.
新型sp3无形碳具有优异的机械和热性能.
对于先进无形固体的新技术应用的潜力.

更多相关视频

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

$Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene$ 08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

相关概念视频

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...