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Local phonon imaging of AlN nanostructures with nanoscale spatial resolution
We demonstrate local phonon analysis of single AlN nanocrystals by two complementary imaging spectroscopic techniques: tip-enhanced Raman scattering (TERS) and nano-Fourier transform infrared (nano-FTIR) spectroscopy. Strong surface optical (SO) phonon modes appear in the TERS spectra with their int...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
RSC
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10187024/ https://www.ncbi.nlm.nih.gov/pubmed/37205283 http://dx.doi.org/10.1039/d3na00054k |
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author | Milekhin, Ilya Anikin, Kirill Kurus, Nina N. Mansurov, Vladimir G. Malin, Timur V. Zhuravlev, Konstantin S. Milekhin, Alexander G. Latyshev, Alexander V. Zahn, Dietrich R. T. |
author_facet | Milekhin, Ilya Anikin, Kirill Kurus, Nina N. Mansurov, Vladimir G. Malin, Timur V. Zhuravlev, Konstantin S. Milekhin, Alexander G. Latyshev, Alexander V. Zahn, Dietrich R. T. |
author_sort | Milekhin, Ilya |
collection | PubMed |
description | We demonstrate local phonon analysis of single AlN nanocrystals by two complementary imaging spectroscopic techniques: tip-enhanced Raman scattering (TERS) and nano-Fourier transform infrared (nano-FTIR) spectroscopy. Strong surface optical (SO) phonon modes appear in the TERS spectra with their intensities revealing a weak polarization dependence. The local electric field enhancement stemming from the plasmon mode of the TERS tip modifies the phonon response of the sample, making the SO mode dominate over other phonon modes. The TERS imaging allows the spatial localization of the SO mode to be visualized. We were able to probe the angle anisotropy on the SO phonon modes in AlN nanocrystals with nanoscale spatial resolution. The excitation geometry and the local nanostructure surface profile determine the frequency position of SO modes in nano-FTIR spectra. An analytical calculation explains the behaviour of SO mode frequencies vs. tip position with respect to the sample. |
format | Online Article Text |
id | pubmed-10187024 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | RSC |
record_format | MEDLINE/PubMed |
spelling | pubmed-101870242023-05-17 Local phonon imaging of AlN nanostructures with nanoscale spatial resolution Milekhin, Ilya Anikin, Kirill Kurus, Nina N. Mansurov, Vladimir G. Malin, Timur V. Zhuravlev, Konstantin S. Milekhin, Alexander G. Latyshev, Alexander V. Zahn, Dietrich R. T. Nanoscale Adv Chemistry We demonstrate local phonon analysis of single AlN nanocrystals by two complementary imaging spectroscopic techniques: tip-enhanced Raman scattering (TERS) and nano-Fourier transform infrared (nano-FTIR) spectroscopy. Strong surface optical (SO) phonon modes appear in the TERS spectra with their intensities revealing a weak polarization dependence. The local electric field enhancement stemming from the plasmon mode of the TERS tip modifies the phonon response of the sample, making the SO mode dominate over other phonon modes. The TERS imaging allows the spatial localization of the SO mode to be visualized. We were able to probe the angle anisotropy on the SO phonon modes in AlN nanocrystals with nanoscale spatial resolution. The excitation geometry and the local nanostructure surface profile determine the frequency position of SO modes in nano-FTIR spectra. An analytical calculation explains the behaviour of SO mode frequencies vs. tip position with respect to the sample. RSC 2023-04-21 /pmc/articles/PMC10187024/ /pubmed/37205283 http://dx.doi.org/10.1039/d3na00054k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Milekhin, Ilya Anikin, Kirill Kurus, Nina N. Mansurov, Vladimir G. Malin, Timur V. Zhuravlev, Konstantin S. Milekhin, Alexander G. Latyshev, Alexander V. Zahn, Dietrich R. T. Local phonon imaging of AlN nanostructures with nanoscale spatial resolution |
title | Local phonon imaging of AlN nanostructures with nanoscale spatial resolution |
title_full | Local phonon imaging of AlN nanostructures with nanoscale spatial resolution |
title_fullStr | Local phonon imaging of AlN nanostructures with nanoscale spatial resolution |
title_full_unstemmed | Local phonon imaging of AlN nanostructures with nanoscale spatial resolution |
title_short | Local phonon imaging of AlN nanostructures with nanoscale spatial resolution |
title_sort | local phonon imaging of aln nanostructures with nanoscale spatial resolution |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10187024/ https://www.ncbi.nlm.nih.gov/pubmed/37205283 http://dx.doi.org/10.1039/d3na00054k |
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