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相关概念视频

Ribozymes02:47

Ribozymes

The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
Ribozymes can be...

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可编程纳米镜组件的宏分子连接体工程

Yang Liu1, Marco Klement2, Yi Wang1

  • 1Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States.

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|September 22, 2021
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概括

研究人员设计了聚合物联体以精确控制纳米晶体组合. 这种方法可以创建具有可调节性能的新型聚合物-纳米晶体混合材料,用于先进的应用.

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科学领域:

  • 材料科学
  • 纳米技术
  • 聚合物化学

背景情况:

  • 体对于纳米晶体组合的能量和动力非常重要.
  • 精确并同时操纵连接物以控制组合仍然具有挑战性.

研究的目的:

  • 介绍用于控制聚合物链参数的宏分子联体工程策略.
  • 为了实现选择性面功能化和产生不一致的纳米晶体.
  • 开发一种可通用的方法来独立控制刷子的厚度和软度.

主要方法:

  • 纳米镜和聚合物之间的联结交换反应.
  • 移植聚合物链的特征和建模 (长度,分散度,密度,分布).
  • 两个阶段的连接物交换用于刷参数控制.
  • 粗的计算机模拟.

主要成果:

  • 实现了选择性面功能化,产生不一致的纳米晶体.
  • 在刷子厚度和软度上表现出独立控制.
  • 合成的聚合物-纳米晶混合材料可以自组装成具有多种对称性的超结构.
  • 通过计算机模拟验证了实验结果.

结论:

  • 大分子联体工程使得聚合物-纳米晶混合材料的精密合成成为可能.
  • 可编程的连接器刷带来了控制对称性的超结构的自组装.
  • 这项工作完善了粒子刷材料的理论模型,并为新材料设计开辟了道路.