The vibrational symphony of silver nanocubes: a key revelation for optimized synthesis
The study carried out by a team from the MONARIS laboratory in collaboration with the Interdisciplinary Carnot de Bourgogne laboratory (ICB), and recently published in ACS Nano, focuses on the analysis of the optical response and acoustic vibrations of silver nanocubes. These nanocubes, little explored in the scientific literature, are nanostructured objects whose subtle shape of edges and vertices has a significant impact on their LSPR (Localized Surface Plasmon Resonance) resonance and their vibration modes.
- Learn more : Vernier, C., Saviot, L., Fan, Y., Courty, A., & Portalès, H.
Sensitivity of Localized Surface Plasmon Resonance and Acoustic Vibrations to Edge Rounding in Silver Nanocubes
ACS Nano 2023 - https://doi.org/10.1021/acsnano.3c06990
- Read the article of the INC-CNRS
The study reveals that subtle variations in the roundness of the edges of the nanocubes result in a significant shift of the LSPR resonance band towards the red. Furthermore, vibrational spectra measured by very low frequency Raman spectroscopy demonstrate the existence of a vibration mode (T2g) previously unobserved in spherical nanoparticles. This observation is consistent with theoretical calculations taking into account the size, shape and crystallinity of the nanocubes.
The ability to synthesize silver nanocubes of very sparsely dispersed size and shape, coupled with the enhancement of the Raman scattering signal by the coupling of the plasmon with the vibrations of the nanocubes, allowed the observation of this vibration mode for the first time. The results highlight the importance of plasmon-vibration coupling in cubic nano-objects and suggest promising prospects for the development of applications exploiting these specific light-matter interactions in the field of nanotechnologies.
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The study carried out by a team from the MONARIS laboratory in collaboration with the Interdisciplinary Carnot de Bourgogne laboratory (ICB), and recently published in ACS Nano, focuses on the analysis of the optical response and acoustic vibrations of silver nanocubes. These nanocubes, little explored in the scientific literature, are nanostructured objects whose subtle shape of edges and vertices has a significant impact on their LSPR (Localized Surface Plasmon Resonance) resonance and their vibration modes.
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Sensitivity of Localized Surface Plasmon Resonance and Acoustic Vibrations to Edge Rounding in Silver Nanocubes
ACS Nano 2023 - https://doi.org/10.1021/acsnano.3c06990
- Read the article of the INC-CNRS
The study reveals that subtle variations in the roundness of the edges of the nanocubes result in a significant shift of the LSPR resonance band towards the red. Furthermore, vibrational spectra measured by very low frequency Raman spectroscopy demonstrate the existence of a vibration mode (T2g) previously unobserved in spherical nanoparticles. This observation is consistent with theoretical calculations taking into account the size, shape and crystallinity of the nanocubes.
The ability to synthesize silver nanocubes of very sparsely dispersed size and shape, coupled with the enhancement of the Raman scattering signal by the coupling of the plasmon with the vibrations of the nanocubes, allowed the observation of this vibration mode for the first time. The results highlight the importance of plasmon-vibration coupling in cubic nano-objects and suggest promising prospects for the development of applications exploiting these specific light-matter interactions in the field of nanotechnologies.
[/kc_column_text][/kc_column][/kc_row] - Learn more : Vernier, C., Saviot, L., Fan, Y., Courty, A., & Portalès, H.