Simulation of AuNPs modified on TiO2 composite films applied on localized surface plasmon resonance based Cu2+ sensor by using finite-difference time-domain method

Pei-Yu Chen; Snow H. Tseng

doi:10.1117/12.3002320

13 March 2024 Simulation of AuNPs modified on TiO2 composite films applied on localized surface plasmon resonance based Cu2+ sensor by using finite-difference time-domain method

Pei-Yu Chen, Snow H. Tseng

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Proceedings Volume PC12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV; PC128350N (2024) https://doi.org/10.1117/12.3002320
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

In this study, simulated by using Finite-Difference Time-Domain method, and applied to spin-coating titanium dioxide (TiO2) solution onto the indium tin oxide (ITO) conductive glass films, and gold nanoparticles (AuNPs) are modified on the TiO2 glass films by using self-assembly method. The sensing element is immersed in five different concentrations of glucose solution, including 0 mg/dl, 50 mg/dl, 100 mg/dl, 150 mg/dl and 200 mg/dl. The results show that the resonance wavelength λSPR was shifted by changing the polarization state of the incident light for the purpose of copper ion (Cu2+) concentration sensing.

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Pei-Yu Chen and Snow H. Tseng "Simulation of AuNPs modified on TiO2 composite films applied on localized surface plasmon resonance based Cu2+ sensor by using finite-difference time-domain method", Proc. SPIE PC12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV, PC128350N (13 March 2024); https://doi.org/10.1117/12.3002320

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KEYWORDS

Titanium dioxide

Finite-difference time-domain method

Localized surface plasmon resonances

Sensors

Biosensors

Polarization

Glasses

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