Towards Quantitative Interpretation of 3D Atomic Force Microscopy at Solid-Liquid Interfaces
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866929660554641408 |
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| author | Ai, Qian Bonagiri, Lalith Krishna Samanth Payam, Amir Farokh Aluru, Narayana R. Zhang, Yingjie |
| author_facet | Ai, Qian Bonagiri, Lalith Krishna Samanth Payam, Amir Farokh Aluru, Narayana R. Zhang, Yingjie |
| contents | Three-dimensional atomic force microscopy (3D-AFM) has been a powerful tool to probe the atomic-scale structure of solid-liquid interfaces. As a nanoprobe moves along the 3D volume of interfacial liquid, the probe-sample interaction force is sensed and mapped, providing information on not only the solid morphology, but also the liquid density distribution. To date 3D-AFM force maps of a diverse set of solid-liquid interfaces have been recorded, revealing remarkable force oscillations that are typically attributed to solvation layers or electrical double layers. However, despite the high resolution down to sub-angstrom level, quantitative interpretation of the 3D force maps has been an outstanding challenge. Here we will review the technical details of 3D-AFM and the existing approaches for quantitative data interpretation. Based on evidences in recent literature, we conclude that the perturbation-induced AFM force paradoxically represents the intrinsic, unperturbed liquid density profile. We will further discuss how the oscillatory force profiles can be attributed to the probe-modulation of the liquid configurational entropy, and how the quantitative, atomic-scale liquid density distribution can be derived from the force maps. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_02939 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Towards Quantitative Interpretation of 3D Atomic Force Microscopy at Solid-Liquid Interfaces Ai, Qian Bonagiri, Lalith Krishna Samanth Payam, Amir Farokh Aluru, Narayana R. Zhang, Yingjie Chemical Physics Three-dimensional atomic force microscopy (3D-AFM) has been a powerful tool to probe the atomic-scale structure of solid-liquid interfaces. As a nanoprobe moves along the 3D volume of interfacial liquid, the probe-sample interaction force is sensed and mapped, providing information on not only the solid morphology, but also the liquid density distribution. To date 3D-AFM force maps of a diverse set of solid-liquid interfaces have been recorded, revealing remarkable force oscillations that are typically attributed to solvation layers or electrical double layers. However, despite the high resolution down to sub-angstrom level, quantitative interpretation of the 3D force maps has been an outstanding challenge. Here we will review the technical details of 3D-AFM and the existing approaches for quantitative data interpretation. Based on evidences in recent literature, we conclude that the perturbation-induced AFM force paradoxically represents the intrinsic, unperturbed liquid density profile. We will further discuss how the oscillatory force profiles can be attributed to the probe-modulation of the liquid configurational entropy, and how the quantitative, atomic-scale liquid density distribution can be derived from the force maps. |
| title | Towards Quantitative Interpretation of 3D Atomic Force Microscopy at Solid-Liquid Interfaces |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2501.02939 |