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通过小角度散射张量断层扫描对宏观样本进行纳米结构调查

Marianne Liebi¹, Marios Georgiadis², Andreas Menzel¹

¹Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.

|November 20, 2015

概括

我们开发了一种新的3D成像方法, 这种技术可以在宏观样本中非破坏性地探测纳米结构的方向,比如骨.

科学领域:

材料科学
生物物理
纳米技术

背景情况:

宏观材料的特性取决于纳米尺度的结构布局和方向.
在生物学中,分层排序优化了功能 (强度,强度),同时最大限度地减少了重量和能量.
现有的纳米尺度成像和散射方法在视野,样本维度或导向模式的复杂性方面存在局限性.

研究的目的:

引入一种用于探测3D宏观样本中的纳米结构的新型成像方法.
克服研究复杂纳米结构方向的现有方法的局限性.
使生物和材料样本中的超结构能够进行非破坏性现场分析.

主要方法:

结合小角度散射与张量断层扫描.
开发了宏观样本的非破坏性3D成像技术.
应用该方法来测量人类状骨中的纳米级矿化原纤维的方向.

主要成果:

成功测量了纳米级矿化原纤维的方向和方向度.
实现25微米的空间分辨率.
对于具有对称性的样品证明了适用性,确保了数值效率.

结论:

小角散射张量扫描是一种多功能,非破坏性的方法,用于描述宏观样本中的3D纳米结构方向.
该技术适用于生物和材料科学,包括智能或生物启发材料.
能够实地研究超结构在组织和材料的机械反应中的作用.

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