Studies of surface plasmon resonance effect on different metallic layers of silver (Ag) and copper (Cu) with molybdenum trioxide (MoO3) for formaldehyde sensor

Zakaria, Rozalina; Mahbub, M.; Lim, C.S.

doi:10.1016/j.rio.2023.100374

Cited by 16 publications

(4 citation statements)

References 34 publications

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“…Most interestingly, the bilayer system has the maximum evanescent field distribution value ∼1.17 × 10 6 V m −1 , higher than that of the trilayer system of a value ∼1.06 × 10 6 V m −1 , and that of pure Ag and Cu at metal/analyte interface. Similar observations were also made for Ag/Au bimetallic system [36,37]. To further illustrate this point, if we consider the electric field value of 0.5 × 10 6 V m −1 , the surface plasmons propagating along the surface of the bimetallic system penetrate the analyte medium ∼100 nm and ∼150 nm deeper compared to the silver-only and copper-only systems, respectively.…”

Section: Resultssupporting

confidence: 69%

Influence of the configuration of metal sensing layers on the performance of a bimetallic (Ag–Cu) surface plasmon resonance biosensor

Pillai,

Nair,

Das

et al. 2024

Nanotechnology

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Bimetallic surface plasmon resonance (SPR) sensors have the potential to overcome the drawbacks of individual metals, but the effect of the configuration of the two metallic layers on the performance of the sensors has not been explored. This study examines the influence of different positions of a thin layer of silver in relation to a copper layer on the sensitivity of such a bimetallic SPR sensor. The design of this configuration aims to improve the SPR reflectance curve and strengthen the evanescent electric field to improve the sensor efficiency. Our findings indicate that, by optimizing the architectures of SPR sensors and using a silver-copper bimetallic structure, we can achieve superior performance compared to devices that utilize only silver or copper. The optimized Ag (5 nm)/Cu (55 nm) sensor design, with the best sensitivity of 299.09°/RIU, can detect a change of 0.43°/(gm/dL) for hemoglobin in blood, 0.35°/(gm/dL) for glucose in urine, and 0.1°/(%) for methanol in ethanol. We also demonstrate the importance of signal quality by introducing two new parameters that offer a better quantitative indication of the efficiency of a sensor than is obtained by using only sensitivity.

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Section: Resultssupporting

confidence: 69%

Influence of the configuration of metal sensing layers on the performance of a bimetallic (Ag–Cu) surface plasmon resonance biosensor

Pillai,

Nair,

Das

et al. 2024

Nanotechnology

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“…A proper covering layer strategy is required to avoid a Cu-based SPR sensor showing degraded performance due to the oxidation effect of Cu. Here, we suggested to use three different oxide coatings, namely BaTiO 3 , Fe 2 O 3 , and MoO 3 , over Cu to inhibit its oxidation effect [30,38,40], and the proposed model also includes a thin layer of TiO 2 as an adhesive that strongly binds Cu on the prism base [45,[47][48][49][50]. The thickness of every layer is well optimized, which leads to achieve high sensitivity, the lowest minimum reflectance (R min ), and the thinnest FWHM of the resonance curve [58].…”

Section: Resultsmentioning

confidence: 99%

“…Lately, Augustine et al reported the superior biocompatibility of molybdenum trioxide (MoO 3 ) suitable for the detection of breast cancer [29]. Zakaria et al developed an SPR sensor with MoO 3 coated on top of Ag and Cu metal, which shows an increase in sensitivity as well as provides protection against oxidation of plasmonic metals [30]. Pandey et al suggested an approach to increasing the sensitivity of an SPR sensor by sandwiching MoO 3 between Ag and MXene [31].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on High-Performance Cu-Based Surface Plasmon Resonance Sensor for Biosensing Application

Muthumanikkam,

Vibisha,

Lordwin Prabhakar

et al. 2023

Sensors

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This numerical research presents a simple hybrid structure comprised of TiO2-Cu-BaTiO3 for a modified Kretschmann configuration that exhibits high sensitivity and high resolution for biosensing applications through an angular interrogation method. Recently, copper (Cu) emerged as an exceptional choice as a plasmonic metal for developing surface plasmon sensors (SPR) with high resolution as it yields finer, thinner SPR curves than Ag and Au. As copper is prone to oxidation, especially in ambient conditions, the proposed structure involves the utilization of barium titanate (BaTiO3) film as a protection layer that not only preserves Cu film from oxidizing but enhances the performance of the sensor to a great extent. Numerical results also show that the utilization of a thin adhesive layer of titanium dioxide (TiO2) between the prism base and Cu film not only induces strong interaction between them but also enhances the performance of the sensor. Such a configuration, upon suitable optimization of the thickness of each layer, is found to enhance sensitivity as high as 552°/RIU with a figure of merit (FOM) of 136.97 RIU−1. This suggested biosensor design with enhanced sensitivity is expected to enable long-term detection with greater accuracy and sensitivity even when using Cu as a plasmonic metal.

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“…, H 2 O 2 is an oxidizing agent, so it requires an anodic type material to be detected, whereas HF is a reducing agent, so it requires a cathodic material to be detected. Transition metal oxides (TMOs) such as NiO, 16 Co 3 O 4 , 17,18 WO 3 , 19 ZnO, 20 MoO 3 , 21 TiO 2 , 18 etc. have been explored for electrochemical sensing, 22 electrochromic devices, 23,24 supercapacitors 25–27 and battery performance.…”

Section: Introductionmentioning

confidence: 99%

Fluorane sensitive supercapacitive microcrystalline MoO₃: dual application in energy storage and HF detection

Bansal,

Ghosh,

Kandpal

et al. 2023

Mater. Adv.

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Studies of surface plasmon resonance effect on different metallic layers of silver (Ag) and copper (Cu) with molybdenum trioxide (MoO3) for formaldehyde sensor

Cited by 16 publications

References 34 publications

Influence of the configuration of metal sensing layers on the performance of a bimetallic (Ag–Cu) surface plasmon resonance biosensor

Influence of the configuration of metal sensing layers on the performance of a bimetallic (Ag–Cu) surface plasmon resonance biosensor

Numerical Investigation on High-Performance Cu-Based Surface Plasmon Resonance Sensor for Biosensing Application

Fluorane sensitive supercapacitive microcrystalline MoO₃: dual application in energy storage and HF detection

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Studies of surface plasmon resonance effect on different metallic layers of silver (Ag) and copper (Cu) with molybdenum trioxide (MoO3) for formaldehyde sensor

Cited by 16 publications

References 34 publications

Influence of the configuration of metal sensing layers on the performance of a bimetallic (Ag–Cu) surface plasmon resonance biosensor

Influence of the configuration of metal sensing layers on the performance of a bimetallic (Ag–Cu) surface plasmon resonance biosensor

Numerical Investigation on High-Performance Cu-Based Surface Plasmon Resonance Sensor for Biosensing Application

Fluorane sensitive supercapacitive microcrystalline MoO3: dual application in energy storage and HF detection

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Product

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Fluorane sensitive supercapacitive microcrystalline MoO₃: dual application in energy storage and HF detection