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Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications

(2012) JOURNAL OF MATERIALS CHEMISTRY. 22(23). p.11537-11542
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Abstract
In this study we investigate and exploit, for optical sensing, the surface plasmon excitation in gold triangular nanoparticles with high aspect ratios (i.e., the ratio of the edge length of the triangles with the height) prepared by nanosphere lithography. As shown previously, the shape and size of these nanoparticles were used to tune their optical properties, monitored by far field extinction spectroscopy. Interestingly, several localized surface plasmon resonances were detected in the visible and near infrared regions and were attributed to dipole and quadrupole modes. These modes, identified from numerical simulations, "red-shift'' as the aspect ratio of the particles increases. The plasmon modes observed for larger triangles exhibit unexpected sensitivity with a change in the refractive index. From experiments and numerical simulations, this higher sensitivity has been attributed to an increase of the local field enhancement for sharper tips. This new effect can provide important information for the design of particles as building blocks for sensing applications.
Keywords
NANOSPHERE LITHOGRAPHY, RESONANCE, METAL NANOPARTICLES, SPECTROSCOPY, NANOPRISMS, SIZE

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Citation

Please use this url to cite or link to this publication:

MLA
Morarescu, Rodica et al. “Exploiting the Localized Surface Plasmon Modes in Gold Triangular Nanoparticles for Sensing Applications.” JOURNAL OF MATERIALS CHEMISTRY 22.23 (2012): 11537–11542. Print.
APA
Morarescu, R., Shen, H., Vallee, R. A., Maes, B., Kolaric, B., & Damman, P. (2012). Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications. JOURNAL OF MATERIALS CHEMISTRY, 22(23), 11537–11542.
Chicago author-date
Morarescu, Rodica, Honghui Shen, Renaud AL Vallee, Björn Maes, Branko Kolaric, and Pascal Damman. 2012. “Exploiting the Localized Surface Plasmon Modes in Gold Triangular Nanoparticles for Sensing Applications.” Journal of Materials Chemistry 22 (23): 11537–11542.
Chicago author-date (all authors)
Morarescu, Rodica, Honghui Shen, Renaud AL Vallee, Björn Maes, Branko Kolaric, and Pascal Damman. 2012. “Exploiting the Localized Surface Plasmon Modes in Gold Triangular Nanoparticles for Sensing Applications.” Journal of Materials Chemistry 22 (23): 11537–11542.
Vancouver
1.
Morarescu R, Shen H, Vallee RA, Maes B, Kolaric B, Damman P. Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications. JOURNAL OF MATERIALS CHEMISTRY. 2012;22(23):11537–42.
IEEE
[1]
R. Morarescu, H. Shen, R. A. Vallee, B. Maes, B. Kolaric, and P. Damman, “Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications,” JOURNAL OF MATERIALS CHEMISTRY, vol. 22, no. 23, pp. 11537–11542, 2012.
@article{2989084,
  abstract     = {In this study we investigate and exploit, for optical sensing, the surface plasmon excitation in gold triangular nanoparticles with high aspect ratios (i.e., the ratio of the edge length of the triangles with the height) prepared by nanosphere lithography. As shown previously, the shape and size of these nanoparticles were used to tune their optical properties, monitored by far field extinction spectroscopy. Interestingly, several localized surface plasmon resonances were detected in the visible and near infrared regions and were attributed to dipole and quadrupole modes. These modes, identified from numerical simulations, "red-shift'' as the aspect ratio of the particles increases. The plasmon modes observed for larger triangles exhibit unexpected sensitivity with a change in the refractive index. From experiments and numerical simulations, this higher sensitivity has been attributed to an increase of the local field enhancement for sharper tips. This new effect can provide important information for the design of particles as building blocks for sensing applications.},
  author       = {Morarescu, Rodica and Shen, Honghui and Vallee, Renaud AL and Maes, Björn and Kolaric, Branko and Damman, Pascal},
  issn         = {0959-9428},
  journal      = {JOURNAL OF MATERIALS CHEMISTRY},
  keywords     = {NANOSPHERE LITHOGRAPHY,RESONANCE,METAL NANOPARTICLES,SPECTROSCOPY,NANOPRISMS,SIZE},
  language     = {eng},
  number       = {23},
  pages        = {11537--11542},
  title        = {Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications},
  url          = {http://dx.doi.org/10.1039/c2jm30944k},
  volume       = {22},
  year         = {2012},
}

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