Optical and Morphological Studies of Gold Nano Thin Films on Glass Substrates for Surface Plasmon Resonance Sensors

Mina Mohammadian; A.H. Sari

doi:10.4028/www.scientific.net/JNanoR.57.51

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HomeJournal of Nano ResearchJournal of Nano Research Vol. 57Optical and Morphological Studies of Gold Nano...

Optical and Morphological Studies of Gold Nano Thin Films on Glass Substrates for Surface Plasmon Resonance Sensors

Abstract:

We have observed surface plasmon resonances (SPR) in Au thin films between 18 nm to 27 nm thick deposited onto glass substrates. The observed resonance angles are between 15.5 to 18.75 degrees, which are lower than predicted theoretical values for thicker films. The shift of resonances with the change of refractive index of surrounding confirms its application for nanobio-sensing. A thorough topological surface analysis and transmitted spectra were performed. Au thin films were annealed in Argon and the analysis repeated and compared with those from pre-annealing. The annealing process will cause a sharper appearance of surface plasmon resonances which will make these thin film devices a more suitable candidate for nanobio-sensing applications.

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Journal of Nano Research (Volume 57)

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51-57

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https://doi.org/10.4028/www.scientific.net/JNanoR.57.51

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April 2019

Authors:

Mina Mohammadian, A.H. Sari

Keywords:

Kretschmann Configuration, Refractive Index Sensor, Sputtering, Surface Plasmon Resonance, Thin Film

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