复杂的二氧化复合纳米材料与DNA原形模板
Xiaoguo Liu1,2, Fei Zhang3,4, Xinxin Jing1
1Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.
Nature
|July 18, 2018
概括
研究人员开发了一种新方法,使用DNA原型架构创建复杂的纳米结构. 这种技术克服了以前的局限性,使生物模拟材料能够精确控制纳米尺度的特征.
科学领域:
- 材料科学
- 纳米技术
- 生物材料工程
背景情况:
- 基因编码的蛋白质支架使生物复合材料在各种尺度上得到控制的矿化.
- 合成方法可以创建微观和宏观尺度的特征,但难以控制纳米尺度.
- DNA纳米技术提供精确的纳米级组装,但由于溶液离子强度和表面充电而面临材料沉积的挑战.
研究的目的:
- 使用DNA纳米结构作为模板制造复杂的纳米级二氧化结构的方法.
- 克服高离子强度和表面电荷的局限性,这些局限性阻碍了DNA纳米结构上的材料沉积.
- 通过各种DNA原形设计和尺度来证明该方法的多功能性.
主要方法:
- 修改了用于合成纳米结构的Stöber方法,以控制沉积前的前体分子聚合.
- 使用多种DNA原型架构 (像框架,曲,多孔) 与1D,2D和3D架构 (10-1,000 nm).
- 使用可调节厚度的无形层来增强机械性能.
主要成果:
- 成功创建了DNA-混合材料, 精确地复制复杂的DNA纳米结构几何结构.
- 通过一系列DNA原始设计和等级架构来证明该方法的有效性.
- 实现了增强的机械性能,涂层混合结构高达DNA模板的十倍,同时保持灵活性.
结论:
- 调整后的Stöber方法提供了一个具有纳米级精度的仿生纳米结构的一般方法.
- 这种技术克服了使用DNA纳米结构制造材料的先前挑战.
- 这种混合材料具有可调节的机械特性,
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