Ballistic dynamics of flexural thermal movements in a nano-membrane revealed with subatomic resolution
Ballistic dynamics of flexural thermal movements in a nano-membrane revealed with subatomic resolution
Flexural oscillations of freestanding films, nanomembranes, and nanowires are attracting growing attention for their importance to the fundamental physical and optical properties and device applications of two-dimensional and nanostructured (meta)materials. Here, we report on the observation of short–time scale ballistic motion in the flexural mode of a nanomembrane cantilever, driven by thermal fluctuation of flexural phonons, including measurements of ballistic velocities and displacements performed with subatomic resolution, using a free electron edge-scattering technique. Within intervals <10 μs, the membrane moves ballistically at a constant velocity, typically ~300 μm/s, while Brownian-like dynamics emerge for longer observation periods. Access to the ballistic regime provides verification of the equipartition theorem and Maxwell-Boltzmann statistics for flexural modes and can be used in fast thermometry and mass sensing during atomic absorption/desorption processes on the membrane.
Liu, Tongjun
53eb4a71-ea7b-4aa7-b96d-b70c5df1dd63
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Gusev, Vitalyi
d558bdf6-4e24-4f43-ac3f-b08640089022
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
19 August 2022
Liu, Tongjun
53eb4a71-ea7b-4aa7-b96d-b70c5df1dd63
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Gusev, Vitalyi
d558bdf6-4e24-4f43-ac3f-b08640089022
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Liu, Tongjun, Ou, Jun-Yu, Papasimakis, Nikitas, MacDonald, Kevin F., Gusev, Vitalyi and Zheludev, Nikolai
(2022)
Ballistic dynamics of flexural thermal movements in a nano-membrane revealed with subatomic resolution.
Science Advances, 8 (33), [eabn8007].
(doi:10.1126/sciadv.abn8007).
Abstract
Flexural oscillations of freestanding films, nanomembranes, and nanowires are attracting growing attention for their importance to the fundamental physical and optical properties and device applications of two-dimensional and nanostructured (meta)materials. Here, we report on the observation of short–time scale ballistic motion in the flexural mode of a nanomembrane cantilever, driven by thermal fluctuation of flexural phonons, including measurements of ballistic velocities and displacements performed with subatomic resolution, using a free electron edge-scattering technique. Within intervals <10 μs, the membrane moves ballistically at a constant velocity, typically ~300 μm/s, while Brownian-like dynamics emerge for longer observation periods. Access to the ballistic regime provides verification of the equipartition theorem and Maxwell-Boltzmann statistics for flexural modes and can be used in fast thermometry and mass sensing during atomic absorption/desorption processes on the membrane.
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Accepted/In Press date: 4 July 2022
Published date: 19 August 2022
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Funding Information:
We would like to acknowledge N. Sessions’ assistance with sample fabrication. This work was supported by the Engineering and Physical Sciences Research Council, UK— EP/M009122/1 and EP/T02643X/1 (to N.I.Z., K.F.M., and J.-Y.O.); the Ministry of Education, Singapore—MOE2016-T3-1-006 (to N.I.Z.); and the China Scholarship Council—201806160012 (to T.L.).
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Copyright © 2022 The Authors, some rights reserved.
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Local EPrints ID: 468278
URI: http://eprints.soton.ac.uk/id/eprint/468278
ISSN: 2375-2548
PURE UUID: 2a4b4c13-ebb8-4d3b-9e0d-b365f9c92c32
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Date deposited: 09 Aug 2022 16:40
Last modified: 17 Mar 2024 03:25
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