Raman Spectra of Crystalline Nanoparticles: Replacement for the Phonon Confinement Model
| Autor: | Ivan Terterov, O. I. Utesov, A. G. Yashenkin, Sergei V. Koniakhin, Alexandra Siklitskaya, Dmitry Solnyshkov |
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| Přispěvatelé: | Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), ANR-16-CE30-0021,QFL,Fluides Quantiques de Lumière(2016) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Phonon Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Molecular physics Light scattering Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols.namesake General Energy 0103 physical sciences symbols [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Nanodiamond Spectroscopy Raman spectroscopy ComputingMilieux_MISCELLANEOUS Matrix method |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, 2018, 122, pp.19219. ⟨10.1021/acs.jpcc.8b05415⟩ Journal of Physical Chemistry C, American Chemical Society, 2018, 122, pp.19219. ⟨10.1021/acs.jpcc.8b05415⟩ |
| ISSN: | 1932-7447 1932-7455 |
| DOI: | 10.1021/acs.jpcc.8b05415⟩ |
| Popis: | In crystalline nanoparticles, the Raman peak is downshifted with respect to the bulk material and has asymmetric broadening. These effects are straightly related to the finite size of nanoparticles, giving the perspective to use Raman spectroscopy as the size probe. By combining the dynamical matrix method (DMM) and the bond polarization model (BPM), we develop a new (DMM–BPM) approach for the description of Raman spectra of nanoparticle powders. The numerical variant of this approach is suitable for the description of small particles, whereas its analytical version is simpler to implement and allows one to obtain the Raman spectra of arbitrary-sized particles. Focusing on nanodiamond powders, the DMM–BPM theory is shown to fit the most recent experimental data much better than the commonly used phonon confinement model. |
| Databáze: | OpenAIRE |
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