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相关概念视频

Micelles01:30

Micelles

Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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相关实验视频

Updated: Jul 12, 2026

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

用双子表面活性剂进行半结构设计:在三维六角阵列中形成超.

Q Huo, R Leon, P M Petroff

    Science (New York, N.Y.)
    |June 2, 1995
    PubMed
    概括

    研究人员利用双子座表面活性剂合成了一种新型的半孔材料 (SBA-2),提供可调节的超级和大表面积. 这种独特的结构,一种石模拟物,为材料科学开辟了新的途径.

    科学领域:

    • 材料科学 材料科学 材料科学
    • 超分子化学 超分子化学
    • 纳米技术 纳米技术

    背景情况:

    • 无机有机单元的液晶状阵列在低温下表现出可逆的光热变化.
    • 双子座表面活性剂,其特点是双头组和可变的疏水尾巴,可以控制有机电荷分布.
    • 现有的溶性表面活性剂或脂质液晶半相缺少合成半结构的对应物.

    研究的目的:

    • 使用双子表面活性剂合成一种具有量身定制性质的新型中孔材料.
    • 探索改造的双子表面活性剂的模板能力,以创建先进的材料.
    • 开发一种类似于有着独特特征的热带石结构的中体结构.

    主要方法:

    • 使用具有可变甲链长度和疏水尾巴的双子表面活性剂来控制分子组合.
    • 合成一个三维六角对称的中相 (SBA-2) (P6(3) /mmc).
    • 修改双子电荷分离和有机尾巴以优化模板效果.

    主要成果:

    • 成功合成了SBA-2中位相,具有规律的,尺寸可变的超级和很大的内部表面积.
    • 合成的 mesostructure 没有已知的溶性表面活性剂或脂类液晶晶相相对应物.
    • 证明了模板效果的优化,包括MCM-48.8的室温合成.

    更多相关视频

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
    08:02

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

    Published on: February 11, 2020

    相关实验视频

    Last Updated: Jul 12, 2026

    Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
    16:24

    Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

    Published on: August 2, 2012

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
    08:02

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

    Published on: February 11, 2020

    结论:

    • 双子座表面活性剂为设计先进的半孔材料提供了一个多功能平台.
    • 合成的SBA-2中层结构提供了一个独特的,可定制的替代传统的化石结构.
    • 这种方法可以精确控制材料合成,用于催化和分离的应用.