Instituto de Ciencia de Materiales de Madrid, CSIC Sor Juana Inés de la Cruz, 28049 Madrid, Spain.
Nat Commun. 2014;5:3126. doi: 10.1038/ncomms4126.
A method that combines high spatial resolution, quantitative and non-destructive mapping of surfaces and interfaces is a long standing goal in nanoscale microscopy. The method would facilitate the development of hybrid devices and materials made up of nanostructures of different properties. Here we develop a multifrequency force microscopy method that enables simultaneous mapping of nanomechanical spectra of soft matter surfaces with nanoscale spatial resolution. The properties include the Young's modulus and the viscous or damping coefficients. In addition, it provides the peak force and the indentation. The method does not limit the data acquisition speed nor the spatial resolution of the force microscope. It is non-invasive and minimizes the influence of the tip radius on the measurements. The same tip is used to measure in air heterogeneous interfaces with near four orders of magnitude variations in the elastic modulus, from 1 MPa to 3 GPa.
一种能够实现高空间分辨率、定量且非破坏性的表面和界面测绘的方法，是纳米尺度显微镜领域长期以来的目标。该方法将有助于开发由不同性质的纳米结构组成的混合器件和材料。在这里，我们开发了一种多频力显微镜方法，能够以纳米级空间分辨率同时绘制软物质表面的纳米力学谱。这些特性包括杨氏模量和粘性或阻尼系数。此外，它还提供了峰值力和压痕。该方法不受数据采集速度或力显微镜空间分辨率的限制。它是非侵入性的，并最大限度地减少了针尖半径对测量的影响。相同的针尖用于在空气中测量具有近四个数量级弹性模量变化的异质界面，从 1 MPa 到 3 GPa。
