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All Journal International Journal of Electrical and Computer Engineering Makara Journal of Science
Mohamad Syahadi
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Computer Science & IT Electrical & Electronics Engineering

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Performance evaluation of single-mode fiber optic-based surface plasmon resonance sensor on material and geometrical parameters Tazi, Imam; Riana, Dedi; Syahadi, Mohamad; Muthmainnah, Muthmainnah; Sasmitaninghidayah, Wiwis; Aprilia, Lia; Tresna, Wildan Panji
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 5: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i5.pp5072-5082

Abstract

Surface plasmon resonance (SPR) sensors are proficient at detecting minute changes in refractive index, making them ideal for biomolecule detection. Traditional prism-based SPR sensors encounter miniaturization challenges, encouraging exploration of alternatives like fiber optic-based SPR (FO-SPR) sensors. This study comprehensively investigates the effects of material and geometrical parameters on the performance of single-mode FO-SPR sensors using Maxwell's equation solver software based on the finite-difference time-domain (FDTD) method. The findings highlight the influence of plasmonic thin film materials and thickness on SPR spectrum profiles and sensitivity. Silver (Ag) demonstrates superior performance compared to copper (Cu) and gold (Au) in transmission type, achieving a sensitivity of up to 2×103 nm/RIU, while the sensitivities of Cu and Au are lower. Probe length and core diameter impact spectrum profiles, specifically resonance depth, without affecting sensitivity. Furthermore, variations in core refractive index influence both spectrum profiles and sensitivity. Probe types significantly affect both spectrum profiles and sensitivity, with the reflection type surpassing the transmission type. These results provide suggestions for optimizing FO-SPR sensors in biotechnological applications.
Plasmonic Nanoparticle Integration on Fiber Optic: Role of Organic Linker and Functionalization Length in Refractive Index Sensing Ilmiyah, Shela; Syahadi, Mohamad; Muflikhah, Muflikhah; Pradana, Yuwana; Supardi, Zainul Arifin Iman; Darmadi, Iwan; Aprilia, Lia
Makara Journal of Science Vol. 29, No. 3
Publisher : UI Scholars Hub

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Abstract

Nanoplasmonic fiber optic sensors leverage the optical fiber’s inherent compactness and surface sensitivity via evanescent-field interactions with the localized surface plasmon resonance of the metallic nanoparticles. One of the popular approaches is self-assembly owing to its relatively low cost. Despite its low cost, the self-assembly technique has low reproducibility and exhibits low sensitivity because of low nanoplasmonic coverage on the fiber optic surface. In this study, several fabrication techniques were explored to assess the refractive index sensitivity by comparing three common organosilanes, i.e., (3-Aminopropyl)triethoxysilane (APTES), (3-Aminopropyl)trimethoxysilane, and (3-Mercaptopropyl)trimethoxysilane. Comparative analyses assessed the anchoring efficiency of the three silanes, sensor reproducibility, functionalization-length sensitivity, and the sensor’s ability in glucose detection (5%–50%) in the reflection and transmission modes. As a result, the APTES-promoted sensor exhibited the best sensing sensitivity among the others, likely owing to their more uniform monolayer formation and the more favorable interaction between NH₂ groups and Au nanoparticles compared with SH groups. Glucose sensing displays a sensitivity of 0.196 nm/%glucose (for reflection) and 0.389 nm/%glucose (for transmission). The limits of detection were 19.44% (for reflection) and 5.71% (for transmission). This study provides important perspectives for the potential use of nanoplasmonic fiber optic sensors in biological and chemical sensing.
Co-Authors Darmadi, Iwan Hadi Sardjono Ilmiyah, Shela Imam Tazi Lia Aprilia Lukluk Khairiyati Muflikhah, Muflikhah Muthmainnah Muthmainnah Pradana, Yuwana Riana, Dedi Supardi, Zainul Arifin Iman Wildan Panji Tresna Wiwis Sasmitaninghidayah