Contact time dependence of adhesion force in the literature is conflicting and needed to be clarified. The adhesion forces between silicon cantilevers and samples with different materials and hydrophilicity were measured to investigate the dependence on an atomic force microscope (AFM) in a humid environment. Results show that the dependence is related to surface materials. On the samples of silicon, glass, and sapphire, the adhesion force increases with dwell time logarithmically, and then reaches saturation. This was attributed to the large viscosity of thin liquid film on the surfaces, which hampers the growth of a liquid bridge, resulting in the long saturation time. For other samples (mica, silica, Au film, highly oriented pyrolytic graphite (HOPG), polymethyl methacrylate (PMMA), diamond-like carbon (DLC) film, and graphene-coated silica), the force does not depend on the dwell time. This was attributed to a very short saturated time due to the low viscosity of a film. However, some abnormal behaviors due to repeated contacts were observed on these samples during the measurements, and the possible reasons behind them were also related to the evolution of a liquid bridge in the contact zone. The results may facilitate the anti-adhesion design for small-scale structures and devices.

文献中粘附力的接触时间依赖性是矛盾的，需要加以澄清。测量了硅悬臂梁与具有不同材料和亲水性的样品之间的粘附力，以研究在潮湿环境中对原子力显微镜（AFM）的依赖性。结果表明，依赖性与表面材料有关。在硅，玻璃和蓝宝石的样品上，附着力随停留时间的对数增加，然后达到饱和。这归因于表面上液体薄膜的高粘度，这阻碍了液桥的生长，从而导致较长的饱和时间。对于其他样品（云母，二氧化硅，Au膜，高度取向的热解石墨（HOPG），聚甲基丙烯酸甲酯（PMMA），类金刚石碳（DLC）膜和石墨烯涂层的二氧化硅），力不取决于停留时间。这归因于膜的低粘度，饱和时间非常短。但是，在测量过程中，在这些样品上观察到由于重复接触而引起的一些异常行为，其背后的可能原因也与接触区中液桥的演变有关。结果可能有助于小型结构和设备的抗粘连设计。