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相关概念视频

Network Covalent Solids02:18

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...

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相关实验视频

Updated: Jul 12, 2026

Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets
13:42

Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets

Published on: November 2, 2011

材料的快速固态前体合成.

J B Wiley, R B Kaner

    Science (New York, N.Y.)
    |February 28, 1992
    PubMed
    概括

    甲基反应为各种材料提供了快速的室温合成路径,可以控制颗粒大小和固体溶液. 热力学分析有助于选择这些外热固体-固体反应的前体.

    科学领域:

    • 材料科学 材料科学 材料科学
    • 固态化学 固态化学
    • 化学合成 化学合成

    背景情况:

    • 转化 (交换) 反应是许多材料的有效合成途径.
    • 这些固体-固体反应是快速的,通常发生在1秒以下.
    • 反应可以在室温或室温附近启动.

    研究的目的:

    • 为了探索材料的合成路径的metathetical反应.
    • 调查控制产品颗粒大小和创建固体解决方案的潜力.
    • 在前体选择中利用热力学考虑.

    主要方法:

    • 对于固体-固体反应,利用转基因路径.
    • 在室温或室温附近启动反应.
    • 分析用于前体选择的反应度.

    主要成果:

    • 证明了各种材料的快速合成,包括MoS2),ZrN,MoSi2和GaAs.
    • 观察到的快速反应时间 (通常<1秒).
    • 对控制颗粒大小和形成固体溶液的已知潜力.

    结论:

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  • 转基因反应为合成各种材料提供了一种多功能和高效的方法.
  • 这些反应的外热性质需要对安全性和效率进行热力学考虑.
  • 这种合成途径在颗粒大小控制和形成高质量的固体溶液方面具有优势.