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Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles

Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles

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SCHNOERING, Gabriel, Yoseline ROSALES-CABARA, Hugo WENDEHENNE, Antoine CANAGUIER-DURAND, Cyriaque GENET, 2019. Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles. In: Physical Review Applied. 11(3), 034023. eISSN 2331-7019. Available under: doi: 10.1103/PhysRevApplied.11.034023

@article{Schnoering2019Therm-45607, title={Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles}, year={2019}, doi={10.1103/PhysRevApplied.11.034023}, number={3}, volume={11}, journal={Physical Review Applied}, author={Schnoering, Gabriel and Rosales-Cabara, Yoseline and Wendehenne, Hugo and Canaguier-Durand, Antoine and Genet, Cyriaque}, note={Article Number: 034023} }

Genet, Cyriaque eng Wendehenne, Hugo Schnoering, Gabriel Genet, Cyriaque Canaguier-Durand, Antoine Rosales-Cabara, Yoseline Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles Rosales-Cabara, Yoseline We propose and evaluate a new type of optical force microscope based on a standing-wave optical trap. Our microscope, calibrated in situ and operating in a dynamic mode, is able to trap, without heating, a single metallic nanoparticle of 150 nm that acts as a highly sensitive probe for external radiation pressure. An Allan-deviation-based stability analysis of the setup yields an optimal 0.1-Hz measurement bandwidth over which the microscope is thermally limited. Over this bandwidth, and with a genuine sine-wave external drive, we demonstrate an optical force resolution down to 3 fN in water at room temperature with a dynamical range for force detection that covers almost 2 orders of magnitude. This resolution is reached in both the confined regime and the freely diffusing regime of the optical trap. In the latter, we measure induced displacements of 10<sup>−11</sup> m on the trapped nanoparticle spatially confined within less than 25 nm along the optical axis. 2019 2019-04-09T12:24:25Z Wendehenne, Hugo 2019-04-09T12:24:25Z Schnoering, Gabriel Canaguier-Durand, Antoine

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