A laterally sensitive colloidal probe for accurately measuring nanoscale adhesion of textured surfaces
A laterally sensitive colloidal probe for accurately measuring nanoscale adhesion of textured surfaces
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DOI：
10.1007/s12274-018-2228-0
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发表时间：
2018-10
期刊：
影响因子：
9.9
通讯作者：
S. Zimmermann;Waldemar Klauser;James L Mead;Shiliang Wang;Han Huang;S. Fatikow
中科院分区：
文献类型：
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作者：
S. Zimmermann;Waldemar Klauser;James L Mead;Shiliang Wang;Han Huang;S. Fatikow
纳米尺度接触的粘附性评估是未来纳米机电系统和纳米生物技术器件发展的关键能力。然而，研究微观和纳米结构表面相互作用的实验方法主要局限于在法向上捕获粘附力。这提供了有限的信息，关于表面纹理的多维性质和相关的相互作用机制。本文介绍了一种独特的原子力显微镜探针的设计、制造和应用，该探针由聚焦的离子束磨成悬臂梁，并用胶体粒子装饰。该探头是专门为具有横向力反馈的纹理表面特征而开发的。拉脱测试，绘制粘合剂的相互作用在微尺度腔执行，以检查探针的能力。准确地获得了纳米尺度接触时的法向和侧向粘附力，从而确定了接触界面的粘附能。深入了解了表面纹理的影响以及粘附和摩擦的相关性。所提出的方法能够专门研究各种非平面表面上的界面相互作用。它可以用于理解纳米尺度上粘附、接触和摩擦力的复杂相互作用，这可能有助于在纤维粘附等具有挑战性的研究领域取得重大进展。
Adhesion assessment of nanoscale contacts is a critical capability for the development of future nanoelectromechanical systems and nanobiotechnology devices. However, experimental approaches to investigate interactions on micro- and nanostructured surfaces have predominantly been restricted to capturing adhesion force in the normal direction. This provides limited information about the multidimensional nature of surface texture and related interaction mechanisms. Here the design, fabrication, and application of a unique atomic force microscope probe is presented that consists of a focused ion beam-milled cantilever decorated with a colloidal particle. The probe is specifically developed for characterizing textured surfaces with lateral force feedback. Pull-off tests that map the adhesive interaction in microscale cavities are performed to examine the capability of the probe. Normal and lateral adhesive forces during nanoscale contact are accurately obtained and the adhesion energy of the contact interface is thus determined. An in-depth understanding of the effects of surface texture and the correlation of adhesion and friction is demonstrated. The proposed methodology enables dedicated investigations of interfacial interaction on various non-planar surfaces. It can be used for understanding the complex interplay of adhesion, contact, and friction forces at nanoscale, which may facilitate significant advances in challenging research areas such as fibrillar adhesion.