Contact Resonance Atomic Force Microscopy Using Long, Massive Tips
Contact Resonance Atomic Force Microscopy Using Long, Massive Tips
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DOI：
10.3390/s19224990
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Tony Jaquez-Moreno;M. Aureli;R. Tung
中科院分区：
文献类型：
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作者：
Tony Jaquez-Moreno;M. Aureli;R. Tung
在这项工作中，我们提出了一种用于接触共振原子力显微镜的新理论模型。该模型结合了长而大的传感尖端的效果，对于解释所谓的拖钓模式下的操作特别有用。该模型基于传统的欧拉-伯努利梁理论，通过适当的边界条件捕获尖端以及接触样品（建模为弹性基底）的效应。当悬臂不与样品接触时，对悬臂弯曲和扭转振动模式的新颖解释用于估计长而大的尖端的惯性特性。利用这些信息，然后根据系统的接触共振频率来估计样品的弹性特性。通过有限元分析验证了所提出模型的预测能力。研究了悬臂几何形状、尖端几何形状和样品刚度的不同组合。讨论了该模型的准确预测范围，并证明其优于目前接触共振原子力显微镜中使用的其他流行模型。
In this work, we present a new theoretical model for use in contact resonance atomic force microscopy. This model incorporates the effects of a long, massive sensing tip and is especially useful to interpret operation in the so-called trolling mode. The model is based on traditional Euler–Bernoulli beam theory, whereby the effect of the tip as well as of the sample in contact, modeled as an elastic substrate, are captured by appropriate boundary conditions. A novel interpretation of the flexural and torsional modes of vibration of the cantilever, when not in contact with the sample, is used to estimate the inertia properties of the long, massive tip. Using this information, sample elastic properties are then estimated from the in-contact resonance frequencies of the system. The predictive capability of the proposed model is verified via finite element analysis. Different combinations of cantilever geometry, tip geometry, and sample stiffness are investigated. The model’s accurate predictive ranges are discussed and shown to outperform those of other popular models currently used in contact resonance atomic force microscopy.