The phase information reflects the energy dissipation of the probe and sample interactions in tapping mode atomic force microscopes (TM AFMs). In this paper, we use the method of tune test in TM AFM to study the contribution of external environment to energy dissipation by changing the probe position and ambient humidity. Finally, the theoretical and experimental quality factors of air viscous damping, squeeze film damping and liquid bridge force are obtained to characterise energy dissipation. The analytically predicted values of the model established on squeeze film damping, viscous damping and liquid bridge force comparing to the experimental results in this paper is rational. And the comparative analysis results show that the main mechanism of energy dissipation is different at different probe positions and different relative humidness. This result is of great significance for understanding the mechanism of phase imaging experimentally and theoretically.

中文翻译：

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轻敲模式原子力显微镜环境耗散机制的理论模型与实验研究

相位信息反映了在轻敲模式原子力显微镜 (TM AFM) 中探针和样品相互作用的能量耗散。在本文中，我们使用TM AFM中的调谐测试方法，通过改变探头位置和环境湿度来研究外部环境对能量耗散的贡献。最后，获得了空气粘性阻尼、挤压膜阻尼和液桥力的理论和实验质量因子来表征能量耗散。与本文的实验结果相比，所建立的挤压膜阻尼、粘性阻尼和液桥力模型的解析预测值是合理的。对比分析结果表明，在不同探头位置和不同相对湿度下，能量耗散的主要机制不同。