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- W3162646805 abstract "ABSTRACT Recent advances in atomic force microscopy (AFM) imaging and force spectroscopy have demonstrated improvements in rapid acquisition of quantitative data for applications in materials science, surface characterization, and biology. However, conventional AFM technology is limited in detection sensitivity and the ability to excite at off-resonance frequencies restricting broad utility of the technology. Here we demonstrate new AFM cantilevers fabricated with a planar microcoil at the tip region, which can be used to generate or sense highly-localized magnetic fields. Torsion/bending actuation of the cantilevers is accomplished with simple experimental configurations, enabling quantitative and simultaneous mapping of both stiffness and friction at the sample surface with more than one order of magnitude improvement in compositional contrast. Our method is compatible with commercial AFM systems, allowing us to clearly resolve small stiffness and friction variations in copolymer and biological samples that were difficult to detect by conventional AFM methods. In combination with fluorescence microscopy, we also generated localized fields to selectively stimulate and monitor structural changes in viable cells with nm-scale detail. Hybrid AFM cantilevers may be useful to characterize a broad range of complex material surfaces, in addition to combined physical and chemical analyses of single cells and biological microenvironments." @default.
- W3162646805 created "2021-05-24" @default.
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- W3162646805 date "2021-05-16" @default.
- W3162646805 modified "2023-09-27" @default.
- W3162646805 title "Microinductor-Fused Atomic Force Microscopy Cantilevers for Dynamic Imaging and Multimodal Manipulation" @default.
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- W3162646805 doi "https://doi.org/10.1101/2021.05.13.444109" @default.
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