Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures
The near-field enhancement and localized surface plasmon resonance (LSPR) on the core-shell noble metal nanostructure surfaces are widely studied for various biomedical applications. However, the study of the optical properties of new plasmonic non-spherical nanostructures is less explored. This num...
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/7/1728 |
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| author | Joshua Fernandes Sangmo Kang |
| author_facet | Joshua Fernandes Sangmo Kang |
| author_sort | Joshua Fernandes |
| collection | DOAJ |
| description | The near-field enhancement and localized surface plasmon resonance (LSPR) on the core-shell noble metal nanostructure surfaces are widely studied for various biomedical applications. However, the study of the optical properties of new plasmonic non-spherical nanostructures is less explored. This numerical study quantifies the optical properties of spherical and non-spherical (prolate and oblate) dimer nanostructures by introducing finite element modelling in COMSOL Multiphysics. The surface plasmon resonance peaks of gold nanostructures should be understood and controlled for use in biological applications such as photothermal therapy and drug delivery. In this study, we find that non-spherical prolate and oblate gold dimers give excellent tunability in a wide range of biological windows. The electromagnetic field enhancement and surface plasmon resonance peak can be tuned by varying the aspect ratio of non-spherical nanostructures, the refractive index of the surrounding medium, shell thickness, and the distance of separation between nanostructures. The absorption spectra exhibit considerably greater dependency on the aspect ratio and refractive index than the shell thickness and separation distance. These results may be essential for applying the spherical and non-spherical nanostructures to various absorption-based applications. |
| first_indexed | 2024-03-10T09:54:30Z |
| format | Article |
| id | doaj.art-2661e7e1f0a446f29ca669be5a4f2a09 |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T09:54:30Z |
| publishDate | 2021-06-01 |
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| series | Nanomaterials |
| spelling | doaj.art-2661e7e1f0a446f29ca669be5a4f2a092023-11-22T02:26:06ZengMDPI AGNanomaterials2079-49912021-06-01117172810.3390/nano11071728Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer NanostructuresJoshua Fernandes0Sangmo Kang1Department of Mechanical Engineering, Dong-A University, Busan 49315, KoreaDepartment of Mechanical Engineering, Dong-A University, Busan 49315, KoreaThe near-field enhancement and localized surface plasmon resonance (LSPR) on the core-shell noble metal nanostructure surfaces are widely studied for various biomedical applications. However, the study of the optical properties of new plasmonic non-spherical nanostructures is less explored. This numerical study quantifies the optical properties of spherical and non-spherical (prolate and oblate) dimer nanostructures by introducing finite element modelling in COMSOL Multiphysics. The surface plasmon resonance peaks of gold nanostructures should be understood and controlled for use in biological applications such as photothermal therapy and drug delivery. In this study, we find that non-spherical prolate and oblate gold dimers give excellent tunability in a wide range of biological windows. The electromagnetic field enhancement and surface plasmon resonance peak can be tuned by varying the aspect ratio of non-spherical nanostructures, the refractive index of the surrounding medium, shell thickness, and the distance of separation between nanostructures. The absorption spectra exhibit considerably greater dependency on the aspect ratio and refractive index than the shell thickness and separation distance. These results may be essential for applying the spherical and non-spherical nanostructures to various absorption-based applications.https://www.mdpi.com/2079-4991/11/7/1728electromagnetic field enhancementlocalized surface plasmon resonanceplasmonic nanostructuresaspect ratiorefractive indexshell thickness |
| spellingShingle | Joshua Fernandes Sangmo Kang Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures Nanomaterials electromagnetic field enhancement localized surface plasmon resonance plasmonic nanostructures aspect ratio refractive index shell thickness |
| title | Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures |
| title_full | Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures |
| title_fullStr | Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures |
| title_full_unstemmed | Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures |
| title_short | Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures |
| title_sort | numerical study on the surface plasmon resonance tunability of spherical and non spherical core shell dimer nanostructures |
| topic | electromagnetic field enhancement localized surface plasmon resonance plasmonic nanostructures aspect ratio refractive index shell thickness |
| url | https://www.mdpi.com/2079-4991/11/7/1728 |
| work_keys_str_mv | AT joshuafernandes numericalstudyonthesurfaceplasmonresonancetunabilityofsphericalandnonsphericalcoreshelldimernanostructures AT sangmokang numericalstudyonthesurfaceplasmonresonancetunabilityofsphericalandnonsphericalcoreshelldimernanostructures |