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- W4324056907 abstract "Achieving high-resolution images using dynamic atomic force microscopy (AFM) requires understanding how chemical and structural features of the surface affect image contrast. This understanding is particularly challenging when imaging samples in water. An initial step is to determine how well-characterized surface features interact with the AFM tip in wet environments. Here, we use molecular dynamics simulations of a model AFM tip apex oscillating in water above self-assembled monolayers (SAMs) with different chain lengths and functional groups. The amplitude response of the tip is characterized across a range of vertical distances and amplitude set points. Then relative image contrast is quantified as the difference of the amplitude response of the tip when it is positioned directly above a SAM functional group vs positioned between two functional groups. Differences in contrast between SAMs with different lengths and functional groups are explained in terms of the vertical deflection of the SAMs due to interactions with the tip and water during dynamic imaging. The knowledge gained from simulations of these simple model systems may ultimately be used to guide selection of imaging parameters for more complex surfaces." @default.
- W4324056907 created "2023-03-14" @default.
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- W4324056907 date "2023-03-13" @default.
- W4324056907 modified "2023-10-05" @default.
- W4324056907 title "Simulations of Subnanometer Scale Image Contrast in Atomic Force Microscopy of Self-Assembled Monolayers in Water" @default.
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- W4324056907 doi "https://doi.org/10.1021/cbmi.3c00001" @default.
- W4324056907 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37235190" @default.
- W4324056907 hasPublicationYear "2023" @default.
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