We demonstrate the formation of metal alloys in Au-Ag, Au-Cu and Au-Pd systems and the experimental determination of their optical properties using optical transmission and reflection spectroscopy. The optical constants define the plasmon resonance wavelength and electromagnetic field local intensity. However, the optical constants behavior cannot be precisely modeled based on the data of pure metals due to unknown morphology and composition of the alloy. It has to be determined experimentally. We demonstrate the surface-enhanced Raman scattering using alloy metals. Depending on the metal to which molecules are adsorbed, we observe enhancement of different Raman modes. It is mainly due to the chemical enhancement effect between metal and molecules.

Engineering gold alloys for plasmonics / Nishijima, Yoshiaki; Hashimoto, Yoshikazu; Seniutinas, Gediminas; Rosa, Lorenzo; Juodkazis, Saulius. - In: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING. - ISSN 0947-8396. - 117:2(2014), pp. 641-645. [10.1007/s00339-014-8716-5]

Engineering gold alloys for plasmonics

ROSA, Lorenzo;
2014

Abstract

We demonstrate the formation of metal alloys in Au-Ag, Au-Cu and Au-Pd systems and the experimental determination of their optical properties using optical transmission and reflection spectroscopy. The optical constants define the plasmon resonance wavelength and electromagnetic field local intensity. However, the optical constants behavior cannot be precisely modeled based on the data of pure metals due to unknown morphology and composition of the alloy. It has to be determined experimentally. We demonstrate the surface-enhanced Raman scattering using alloy metals. Depending on the metal to which molecules are adsorbed, we observe enhancement of different Raman modes. It is mainly due to the chemical enhancement effect between metal and molecules.
2014
117
2
641
645
Engineering gold alloys for plasmonics / Nishijima, Yoshiaki; Hashimoto, Yoshikazu; Seniutinas, Gediminas; Rosa, Lorenzo; Juodkazis, Saulius. - In: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING. - ISSN 0947-8396. - 117:2(2014), pp. 641-645. [10.1007/s00339-014-8716-5]
Nishijima, Yoshiaki; Hashimoto, Yoshikazu; Seniutinas, Gediminas; Rosa, Lorenzo; Juodkazis, Saulius
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1138544
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