Measured at a polymer coating adhered to the micro-nano scale can be

Polymer coating in energy, catalysis, microelectronics and many other fields have important applications. Adhesion between the polymer coating and the substrate can be measured not only allows further academic study physical interface, also it allows to define the amount of industrial evaluates the longevity and stability of the coating. Although the \”glue\” historical phenomenon has been studied for centuries, but when the scale becomes small, the adhesion can be measured remains difficult. From the practical point of view, in recent years with the development of nanotechnology, the device size becomes small, thus the adhesion energy measurement becomes increasingly important at small scales. From the perspective of academic research, such measurements can be used to study microscopic properties and interface properties. The most commonly used method although relatively complex, but still there is a big error. Conventional mechanical peeling method will cause a lot of useful work dissipated, and the other a common atomic force microscope (AFM) measuring principle is the first plating layer and the substrate surface is exposed to the atmosphere was measured again, but this way, the air and water vapor contaminant particles will be attached at the interface, resulting in measurement errors. Therefore, it is still more advanced measurement methods, both to achieve accurate measurements, measurements can be done in a small scale. And this method is actually very simple: the use of condensation can be used to carry out the relevant measure. Water vapor condensation in cold surface is very common, and our lives phenomenon. In the winter, when entering a warm room from the cold outdoors, cold glasses because of condensation surface covered with a layer of mist; in the summer to Coke out of the fridge will bead up on the surface because of condensation. Recently, University of Illinois at Urbana – Urbana-Champaign Jingcheng Ma (Ma Jing Cheng) , Professor David G. Cahill and Prof. Nenad Miljkovic found that as long as the polymer coating is cooled, water vapor in the atmosphere condenses thereon, a portion of the water vapor will pass through the film holes Li Nami defect size, penetrate into the coating film condensing the interface substrate, and forming micron sized blisters. Adsorption of the shape of the film can be directly related to these blisters, thus to calculate the size of the film in microns adhesion energy by measuring the size and shape of the blisters. This techniqueIt may be used in thin film coating thickness of at least 10 nm, and may reach 1 μm spatial resolution and energy resolution of 1 mJ / m2 of. This study provides a very simple yet accurate method of measuring the adhesion energy, and can be measured at small scale. The study for further study of the microscopic interfacial phenomena, and reliability are characterizing the coating has a profound effect. Research articles published in the top journals of one of nanoscience \” Nano Letters \”. 测量高分子镀层在微纳尺度下的粘附能 Image 🙁 left) array of blisters schematic (in) blisters micron condensed manufactured by Nanoindentation (right) as measured by the bubble array 30 nm obtained fluorine-based polymer – Reference silica adhesion energy spectrum Document: Ma, J., Cahill, DG, & Miljkovic, N. (2020) Condensation Induced Blistering as a Measurement Technique for the Adhesion Energy of Nanoscale Polymer Films Nano Letters…

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