Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue
The scattering and absorption efficiencies of light by a single silicon/silica/gold spherical multishell in biological tissues are analyzed theoretically in the framework of Lorenz–Mie theory and finite-difference time-domain formalism. We first revised the ideal case of a concentric silicon/gold na...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/9358740 |
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| _version_ | 1832560860496658432 |
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| author | Wajdi Chaabani Abdallah Chehaidar Julien Proust Jérôme Plain |
| author_facet | Wajdi Chaabani Abdallah Chehaidar Julien Proust Jérôme Plain |
| author_sort | Wajdi Chaabani |
| collection | DOAJ |
| description | The scattering and absorption efficiencies of light by a single silicon/silica/gold spherical multishell in biological tissues are analyzed theoretically in the framework of Lorenz–Mie theory and finite-difference time-domain formalism. We first revised the ideal case of a concentric silicon/gold nanoshell, analyzed the effect of growing a silica layer of uniform thickness around the silicon core, and then examined the effect of an offset of the gold shell with respect to the centre of the silicon/silica nanoshell. Our simulation showed that the silicon/gold nanoshell in the biological tissue supports significant absorption and scattering resonances in the biological spectral window. On the contrary, the growth of a silica layer on the silicon core surface leads to a blueshift of these resonances accompanied by a slight increase of their magnitudes. The offset of the gold shell with respect to the silicon/silica core results in a redshift of the absorption and scattering resonances supported by the concentric silicon/silica/gold multishell within the biological window, accompanied by a decrease in their amplitudes. On the contrary, the gold shell offset gives rise to a more prominent electric field enhancement at the silicon/silica/gold multishell-biological tissue interface. Our simulation thus shows that silicon/silica/gold multishell nanoparticles are potential candidates in bioimaging and photothermal therapy applications. |
| format | Article |
| id | doaj-art-3fe0b85c891846e796224bbb32ad593b |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-3fe0b85c891846e796224bbb32ad593b2025-02-03T01:26:27ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/93587409358740Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological TissueWajdi Chaabani0Abdallah Chehaidar1Julien Proust2Jérôme Plain3Laboratoire de Physique-Mathématiques et Applications, Université de Sfax, Faculté des Sciences de Sfax, B.P. 1171, 3000 Sfax, TunisiaLaboratoire de Physique-Mathématiques et Applications, Université de Sfax, Faculté des Sciences de Sfax, B.P. 1171, 3000 Sfax, TunisiaLaboratoire de Nanotechnologie et d’Instrument Optique, Université de Technologie de Troyes, 12 rue Marie Curie, CS 42060, 10004 Troyes Cedex, FranceLaboratoire de Nanotechnologie et d’Instrument Optique, Université de Technologie de Troyes, 12 rue Marie Curie, CS 42060, 10004 Troyes Cedex, FranceThe scattering and absorption efficiencies of light by a single silicon/silica/gold spherical multishell in biological tissues are analyzed theoretically in the framework of Lorenz–Mie theory and finite-difference time-domain formalism. We first revised the ideal case of a concentric silicon/gold nanoshell, analyzed the effect of growing a silica layer of uniform thickness around the silicon core, and then examined the effect of an offset of the gold shell with respect to the centre of the silicon/silica nanoshell. Our simulation showed that the silicon/gold nanoshell in the biological tissue supports significant absorption and scattering resonances in the biological spectral window. On the contrary, the growth of a silica layer on the silicon core surface leads to a blueshift of these resonances accompanied by a slight increase of their magnitudes. The offset of the gold shell with respect to the silicon/silica core results in a redshift of the absorption and scattering resonances supported by the concentric silicon/silica/gold multishell within the biological window, accompanied by a decrease in their amplitudes. On the contrary, the gold shell offset gives rise to a more prominent electric field enhancement at the silicon/silica/gold multishell-biological tissue interface. Our simulation thus shows that silicon/silica/gold multishell nanoparticles are potential candidates in bioimaging and photothermal therapy applications.http://dx.doi.org/10.1155/2019/9358740 |
| spellingShingle | Wajdi Chaabani Abdallah Chehaidar Julien Proust Jérôme Plain Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue Advances in Materials Science and Engineering |
| title | Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue |
| title_full | Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue |
| title_fullStr | Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue |
| title_full_unstemmed | Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue |
| title_short | Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue |
| title_sort | theoretical analysis of the optical response of silicon silica gold multishell nanoparticles in biological tissue |
| url | http://dx.doi.org/10.1155/2019/9358740 |
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