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Real-time probe based quantitative determination of material properties at the nanoscale

机译：基于实时探针的纳米级材料性能的定量测定

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Tailoring the properties of a material at the nanoscale holds the promise of achieving hitherto unparalleled specificity of the desired behavior of the material. Key to realizing this potential of tailoring materials at the nanoscale are methods for rapidly estimating physical properties of the material at the nanoscale. In this paper, we report a method for simultaneously determining the topography, stiffness and dissipative properties of materials at the nanoscale in a probe based dynamic mode operation. The method is particularly suited for investigating soft-matter such as polymers and bio-matter. We use perturbation analysis tools for mapping dissipative and stiffness properties of material into parameters of an equivalent linear time-invariant model. Parameters of the equivalent model are adaptively estimated, where, for robust estimation, a multi-frequency excitation of the probe is introduced. We demonstrate that the reported method of simultaneously determining multiple material properties can be implemented in real-time on existing probe based instruments. We further demonstrate the effectiveness of the method by investigating properties of a polymer blend in real-time.
机译：量身定制纳米级材料的特性，有望实现迄今为止所需材料性能无与伦比的特异性。实现纳米级定制材料潜力的关键是快速估算纳米级材料物理性能的方法。在本文中，我们报告了一种在基于探针的动态模式操作中同时确定纳米级材料的形貌，刚度和耗散特性的方法。该方法特别适合于研究软物质，例如聚合物和生物物质。我们使用扰动分析工具将材料的耗散性和刚度特性映射为等效线性时不变模型的参数。自适应地估计等效模型的参数，其中，为了进行稳健的估计，引入了探头的多频激励。我们证明，报告的同时确定多种材料特性的方法可以在现有基于探针的仪器上实时实施。我们通过实时研究聚合物共混物的性能进一步证明了该方法的有效性。

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