Performance of Graphene-on-Gold SPR Biosensor using Wurtzite Nitrides


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Mohanty, G and Sahoo, BK and Akhtar, J (2016) Performance of Graphene-on-Gold SPR Biosensor using Wurtzite Nitrides. In: International Symposium on Electronics and Smart Devices (ISESD-2016), November 29-30, 2016, Bandung, Indonesia. (Submitted)

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The effect of wurtzite nitride semiconductor on performance of a graphene-on-gold surface plasmon resonance (SPR) biosensor has been explored theoretically. Wurtzite nitrides (i.e. Aluminium Nitride, Gallium Nitride and Indium Nitride) have been introduced in between active metal gold and graphene layers. All performance parameters of the proposed SPR configuration has been computed for with and without semiconductors. It is found that wurtzite nitrides demonstrate high sensitivity and improved performance in comparison to Si and Ge due to its superior optical and electronic properties. The enhancement of evanescent electric field due to wurtzite nitrides as well as Si and Ge have been computed and found highest enhancement for InN. This is due to higher refractive index of lnN than GaN and AIN. Analysis shows that for a high sensitive imaging biosensor the requisite optimal thickness of InN, graphene and gold are respectively 11 nm, 0.34 nm and 49 nm for light of wavelength 632.8 nm. This study suggests that addition of lnN-layer would be a better choice for fabrication of high sensitive and high precision imaging SPR sensor for biomedical application.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: SPR biosensor, wurtzite nitrides, sensitivity, FOM, evanescent field, performance.
Subjects: Semiconductor Devices > Sensors and Nanotechnology
Divisions: Semiconductor Devices
Depositing User: Mr. Rohit Singh
Date Deposited: 20 Jun 2017 09:48
Last Modified: 20 Jun 2017 09:48

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