Surface plasmon resonance biosensing by electro-optically modulated attenuated total reflection

Wang, T.-J.; Cheng, Chin‐Chi; Yang, Shuqing

doi:10.1007/s00340-010-4292-3

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…These outcomes are consistent with research by [20]. Adding an external electric field can also change the dielectric constant significantly, causing a shift in the Polymers, Composites, Nano-and Bio-Materials SPR angle [30]. The greater the SPR angle indicates that the sensitivity and detection of the SPR signal also increase [31].…”

Section: Materials and Experimental Methodssupporting

confidence: 83%

Green Synthesis of Magnetite Nanoparticles Using <i>Moringa oleifera</i> and their Electro-Optic Surface Plasmon Resonance Properties

Wahyuni,

Riswan,

Tumbelaka

et al. 2024

MSF

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The application of an external electric field to the surface plasmon resonance (SPR) system of green-synthesized magnetite (Fe3O4) nanoparticles (MNPs) is very promising for increasing the SPR detection signal. Electro-optic surface plasmon resonance (EOSPR) behavior of MNPs has been successfully carried out. The EOSPR system was investigated using the Kretschmann configuration with the prism/Au thin film/MNPs/air layer arrangement and applying an electric voltage of 0 V, 2 V, 4 V, and 6 V. In this study, we synthesized MNPs using the green synthesis approach from moringa oleifera extract. The benefits of green synthesis include being safe, affordable, clean, and ecologically friendly processes. X-ray diffraction results obtained crystal size of the MNPs is about 9.2 nm with inverse spinel face-centered cubic crystal structure. Fourier transforms infrared characterization showed the presence of Fe-O bonds at wave numbers 569 cm-1 and 629 cm-1, indicating that MNPs were successfully formed. The saturation magnetization of the samples is 55.3 emu/g. The SPR angle of the SPR system Prism/Au thin film/air without the addition of MNPs is 44.66°. After being deposited by MNPs and induced by a voltage of 0 V, 2 V, 4 V, and 6 V, the SPR angles changed to 44.87°, 44.90°, 44.95° and 45.12°. The addition of MNPs and an external electric field causes the SPR angle to increase. The results of this study can provide new insights into the development of optical devices that can be manipulated electrically and have the potential for future biosensor applications.

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Section: Materials and Experimental Methodssupporting

confidence: 83%

Green Synthesis of Magnetite Nanoparticles Using <i>Moringa oleifera</i> and their Electro-Optic Surface Plasmon Resonance Properties

Wahyuni,

Riswan,

Tumbelaka

et al. 2024

MSF

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“…The main types of sensors used in biodetection are electrochemical [3], thermometric [4], piezoelectric [5], magnetic [6], and optical sensors (plasmonic [7], UV-Vis/infrared spectroscopy [8], Raman and SERS [9], or attenuated total reflection [10]). Biosensors that are developed using hierarchical nanostructures can be manufactured with different nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Nanobiosensors at the End of the SARS-CoV-2 Pandemic

Medrano-Lopez,

Villalpando,

Salazar

et al. 2024

Biosensors

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Nanostructures have played a key role in the development of different techniques to attack severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Some applications include masks, vaccines, and biosensors. The latter are of great interest for detecting diseases since some of their features allowed us to find specific markers in secretion samples such as saliva, blood, and even tears. Herein, we highlight how hierarchical nanoparticles integrated into two or more low-dimensional materials present outstanding advantages that are attractive for photonic biosensing using their nanoscale functions. The potential of nanohybrids with their superlative mechanical characteristics together with their optical and optoelectronic properties is discussed. The progress in the scientific research focused on using nanoparticles for biosensing a variety of viruses has become a medical milestone in recent years, and has laid the groundwork for future disease treatments. This perspective analyzes the crucial information about the use of hierarchical nanostructures in biosensing for the prevention, treatment, and mitigation of SARS-CoV-2 effects.

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“…In order to enhance the detection accuracy and the limit of detection, the input light properties need to be modulated. Modulation methods include incident angle modulation by mechanical rotation [6], wavelength modulation [7] and electro-optic modulation [9]. The index of the medium can be determined by monitoring the variation of the incident angle or wavelength corresponding to the SPR occurrence, and the intensity-voltage characteristics.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity enhancement of magneto-optic surface plasmon resonance sensors with noble/ferromagnetic metal heterostructure

2014

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This paper reports strategies of sensitivity enhancement for magneto-optic surface plasmon resonance (MOSPR) sensors using metal heterostructure for two types of measured signals, ordinary and normalized reflectivity changes ( R PP and R PP /R PP ). The sensitivities using the R PP and R PP /R PP signals are effectively enhanced with the improvement as large as 58.91% and several orders by adjusting the device parameters. This paper demonstrates the occurrence of the maximal sensitivities for the R PP and R PP /R PP signals at different incident angles and composite film parameters for the first time. The sensing using the R PP /R PP signal requires a smaller total film thickness, a larger thickness ratio of the Co/Au film and a smaller thickness ratio of the underlay/overlay Au film than that using the R PP signal. Besides, the sensing using the R PP /R PP signal has a much higher sensitivity than that using the R PP signal. The conditions for maximal sensitivity and the physics of sensitivity enhancement for MOSPR sensors are also discussed. The newly-discovered ultra-high sensitivity using the R PP /R PP signal, which is several orders larger than that in the literature, has strict parameter tolerance and its realization requires accurate tuning of the device parameters.

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Surface plasmon resonance biosensing by electro-optically modulated attenuated total reflection

Cited by 6 publications

References 9 publications

Green Synthesis of Magnetite Nanoparticles Using <i>Moringa oleifera</i> and their Electro-Optic Surface Plasmon Resonance Properties

Green Synthesis of Magnetite Nanoparticles Using <i>Moringa oleifera</i> and their Electro-Optic Surface Plasmon Resonance Properties

Hierarchical Nanobiosensors at the End of the SARS-CoV-2 Pandemic

Sensitivity enhancement of magneto-optic surface plasmon resonance sensors with noble/ferromagnetic metal heterostructure

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