Characterising the size and shape of metallic nano-structures by their acoustic vibrations

Fuentes-Domínguez, Rafael; Naznin, Shakila; Marques, Leonel; Pérez-Cota, Fernando; Smith, Richard J.; Clark, Matt

doi:10.1039/d0nr03410j

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…The emergence of PLU techniques has enabled the study of ultrafast phenomena in biological and non-biological fields. For instance, the electron and phonon dynamics of nanoparticles [5] , semiconductors [6] and biological samples [7] .…”

Section: Introductionmentioning

confidence: 99%

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

et al. 2023

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“…This technology has enabled the study of ultrafast events in metallic nanostructures such as electron dynamics, , electron–phonon coupling , and phonon dynamics. − The first two effects occur in the very fast time regime, i.e., hundreds of femtoseconds, whereas the phonon dynamics occur from hundreds to several thousands of picoseconds. This technology and the phonon dynamics provide a method to characterize simultaneously the size and shape of simple structures such as spheres and rods, as well as the provide super-resolution imaging capabilities on spherical nanoparticles with a precision of 3 nm. Moreover, phonon technologies offer a way to extract information on the mechanical properties of the surrounding medium .…”

Section: Introductionmentioning

confidence: 99%

Polarization-Sensitive Super-Resolution Phononic Reconstruction of Nanostructures

et al. 2022

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In this paper, we show for the first time the polarization-sensitive super-resolution phononic reconstruction of multiple nanostructures in a liquid environment by overcoming the diffraction limit of the optical system (1 μm). By using timeresolved pump−probe spectroscopy, we measure the acoustic signature of nanospheres and nanorods at different polarizations. This enables the size, position, and orientation characterization of multiple nanoparticles in a single point spread function with the precision of 5 nm, 3 nm, and 1.4°, respectively. Unlike electron microscopy where a high vacuum environment is needed for imaging, this technique performs measurements in liquids at ambient pressure, ideal to study the insights of living specimens. This is a potential path toward super-resolution phononic imaging where the acoustic signatures of multiple nanostructures could act as an alternative to fluorescent labels. In this context, phonons also offer the opportunity to extract information about the mechanical properties of the surrounding medium as well as access to subsurface features.

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Phonon imaging in 3D with a fibre probe

et al. 2021

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We show for the first time that a single ultrasonic imaging fibre is capable of simultaneously accessing 3D spatial information and mechanical properties from microscopic objects. The novel measurement system consists of two ultrafast lasers that excite and detect high-frequency ultrasound from a nano-transducer that was fabricated onto the tip of a single-mode optical fibre. A signal processing technique was also developed to extract nanometric in-depth spatial measurements from GHz frequency acoustic waves, while still allowing Brillouin spectroscopy in the frequency domain. Label-free and non-contact imaging performance was demonstrated on various polymer microstructures. This singular device is equipped with optical lateral resolution, 2.5 μm, and a depth-profiling precision of 45 nm provided by acoustics. The endoscopic potential for this device is exhibited by extrapolating the single fibre to tens of thousands of fibres in an imaging bundle. Such a device catalyses future phonon endomicroscopy technology that brings the prospect of label-free in vivo histology within reach.

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Characterising the size and shape of metallic nano-structures by their acoustic vibrations

Abstract:
Reconstruction of nanostructure sizes and shapes by measuring their acoustic vibrations.

Cited by 6 publications

References 32 publications

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

Polarization-Sensitive Super-Resolution Phononic Reconstruction of Nanostructures

Phonon imaging in 3D with a fibre probe

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Characterising the size and shape of metallic nano-structures by their acoustic vibrations

Abstract: Reconstruction of nanostructure sizes and shapes by measuring their acoustic vibrations.

Cited by 6 publications

References 32 publications

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

Polarization-Sensitive Super-Resolution Phononic Reconstruction of Nanostructures

Phonon imaging in 3D with a fibre probe

Contact Info

Product

Resources

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Abstract:
Reconstruction of nanostructure sizes and shapes by measuring their acoustic vibrations.