Magnetoimpedance of thin film meander with composite coating layer containing Ni nanoparticles

Lodewijk, K. J.; Férnández, Eduardo F.; Garcı́a-Arribas, A.; Kurlyandskaya, G.V.; Lepalovskij, V. N.; Сафронов, А. П.; Kooi, Bart J.

doi:10.1063/1.4865319

Cited by 23 publications

(9 citation statements)

References 10 publications

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“…This reduction in MI is assumed to be due to non-uniform distribution and high-level clusters beads [ 113 ]. Comparable findings have been reported, where large MI responses have been achieved at low concentrations [ 111 , 114 , 115 ]. Rife et al stated that the opposite dipole fields produced by the bead clusters reduces the applied external magnetic field where the resultant MR signals become lower in the presence of beads agglomeration (above 1000 beads) [ 34 ].…”

Section: Magnetic Particle Concentration and Magnetic Field Influesupporting

confidence: 82%

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Sayad

Skafidas

Kwan

2020

Sensors

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Biosensors based on magneto-impedance (MI) effect are powerful tools for biomedical applications as they are highly sensitive, stable, exhibit fast response, small in size, and have low hysteresis and power consumption. However, the performance of these biosensors is influenced by a variety of factors, including the design, geometry, materials and fabrication procedures. Other less appreciated factors influencing the MI effect include measuring circuit implementation, the material used for construction, geometry of the thin film sensing element, and patterning shapes compatible with the interface microelectronic circuitry. The type magnetic (ferrofluid, Dynabeads, and nanoparticles) and size of the particles, the magnetic particle concentration, magnetic field strength and stray magnetic fields can also affect the sensor sensitivity. Based on these considerations it is proposed that ideal MI biosensor sensitivity could be achieved when the sensor is constructed in sandwich thick magnetic layers with large sensing area in a meander shape, measured with circuitry that provides the lowest possible external inductance at high frequencies, enclosed by a protective layer between magnetic particles and sensing element, and perpendicularly magnetized when detecting high-concentration of magnetic particles.

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Section: Magnetic Particle Concentration and Magnetic Field Influesupporting

confidence: 82%

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Sayad

Skafidas

Kwan

2020

Sensors

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“…6 and 7, the GMI response starts to decrease when CEA concentration exceeds 10 ng mL À1 , namely, the GMI sensor seems incapable of quantifying the highconcentration CEA. G. V. Kurlyandskaya et al 40 also found the similar phenomenon that high-concentration nanoparticles can cause the reduction of the target signals. A similar result was reported by J. Devkota et al 39 who found that the GMI signals began to go down when high-concentration magnetic nanoparticles were tested.…”

Section: Detection Limit and Linear Rangementioning

confidence: 67%

Ultrasensitive determination of carcinoembryonic antigens using a magnetoimpedance immunosensor

et al. 2015

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Herein, a giant magnetoimpedance (GMI) sensor combined with the sandwich immunoassay was used for ultrasensitive detection of carcinoembryonic antigens (CEA). Oblong-shaped Au films were enclosed with SU-8 photoresists to form several microcavities that were treated with different concentrations of CEA.The quantification of low-concentration CEA (1 pg mL À1 -10 ng mL À1 ) was achieved by using one single GMI sensor, demonstrating a good linear relationship between the GMI response and the CEA concentration. The lower detection limit for CEA was found to be as low as 1 pg mL À1 , which provides extreme sensitivity. We observed that high-concentration CEA (>10 ng mL À1 ) can result in a cluster of Dynabeads, thereby reducing the target signals since the adjacent magnetic dipole fields canceled each other out. Target specificity of the GMI-based magnetic immunoassay has also been verified by testing nonspecific targets. The results obtained here suggest that the GMI sensor could serve as an ultrasensitive immunosensor for quantitative determination of biomarkers.

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“…It was shown previously that the shape anisotropy plays a crucial role and the MI ratio decreases significantly in the ribbons with a length of less than a few centimeters [14,15]. One of the solutions to such a problem was to create patterned elements in the shape of the meander [16,17,18] when the flat surface of the sensor element is required. Although meander geometry was previously applied with success for the case of MI multilayered structures [19,20,21], the proposed solution was shown to be useful in selected applications as the ribbon patterning technology is cheaper in comparison with the thin films case, despite the disadvantage of a lower degree of compatibility with semiconductor electronics, and the interaction effect resulting in a decrease of the overall sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Magnetoimpedance Effect in the Ribbon-Based Patterned Soft Ferromagnetic Meander-Shaped Elements for Sensor Application

Yang

Членова

Голубева

et al. 2019

Sensors

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Amorphous and nanocrystalline soft magnetic materials have attracted much attention in the area of sensor applications. In this work, the magnetoimpedance (MI) effect of patterned soft ferromagnetic meander-shaped sensor elements has been investigated. They were fabricated starting from the cobalt-based amorphous ribbon using the lithography technique and chemical etching. Three-turn (S1: spacing s = 50 μm, width w = 300 μm, length l = 5 mm; S2: spacing s = 50 μm, width w = 400 μm, length l = 5 mm) and six-turn (S3: s = 40 μm, w = 250 μm, length l = 5 mm; S4: s = 40 μm, w = 250 μm and l = 8 mm) meanders were designed. The ‘n’ shaped meander part was denominated as “one turn”. The S4 meander possesses a maximum MI ratio calculated for the total impedance ΔZ/Z ≈ 250% with a sensitivity of about 36%/Oe (for the frequency of about 45 MHz), and an MI ratio calculated for the real part of the total impedance ΔR/R ≈ 250% with the sensitivity of about 32%/Oe (for the frequency of 50 MHz). Chemical etching and the length of the samples had a strong impact on the surface magnetic properties and the magnetoimpedance. A comparative analysis of the surface magnetic properties obtained by the magneto-optical Kerr technique and MI data shows that the designed ferromagnetic meander-shaped sensor elements can be recommended for high frequency sensor applications focused on the large drop analysis. Here we understand a single large drop as the water-based sample to analyze, placed onto the surface of the MI sensor element either by microsyringe (volue range 0.5–500 μL) or automatic dispenser (volume range 0.1–50 mL).

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Magnetoimpedance of thin film meander with composite coating layer containing Ni nanoparticles

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Cited by 23 publications

References 10 publications

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Ultrasensitive determination of carcinoembryonic antigens using a magnetoimpedance immunosensor

Magnetoimpedance Effect in the Ribbon-Based Patterned Soft Ferromagnetic Meander-Shaped Elements for Sensor Application

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