Enhancement of magneto-optical Kerr response by LSPR in magneto plasmonic nanostructures for biological sensors

Moradi, Mehrdad; Ayareh, Zohreh; Mahmoodi, Saman

doi:10.1016/j.jmmm.2017.08.033

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…Small AuNPs with a mean diameter of 20 nm were synthesized using the Turkevich method [30] as previously reported [31]. Citrate-stabilized Au nanoparticles were prepared in DI water via reduction of HAuCl4 with trisodium citrate.…”

Section: Preparation Of Citrate-stabilized Au Nanoparticlesmentioning

confidence: 99%

LSPR Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Ayareh

Moradi

2022

Preprint

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Nanoparticles of noble metals are well known to display unique optical properties due to the localized surface plasmon resonance (LSPR) phenomenon, making them applicable for use as transducers in various LSPR sensor configurations. In order to develop a sensor chip, Au nanoparticles (AuNPs) were decorated onto a transparent glass substrate in the form of a uniform, high-density single layer using a self-assembly monolayer (SAM) process. The glass substrate surface was initially modified with amine functional groups using different concentrations of (3-Aminopropyl) triethoxysilane (APTES), followed by its optimization to reach a uniform monolayer of AuNPs. The optimized substrate was subsequently prepared by functionalization with APTES, while also being immersed into colloidal AuNPs. A uniform layer of Graphene oxide (GO) and reduced graphene oxide (rGO) sheets were coated on the AuNPs thin films using the dip-coating technique. The AuNPs/GO and rGO hybrid films were employed along with an appropriate optical set up acting as a smart sensor chip for detection of different concentrations of biomaterials. The optimum LSPR sensor (%0.5 APTES immersed in colloidal AuNPs for 12 h) resulted in a chip with %29 absorption and sharper plasmon peak. This appropriate condition remained constant after adding rGO, indicating that Glass/AuNPs/rGO chip will be suitable for sensory applications.

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Section: Preparation Of Citrate-stabilized Au Nanoparticlesmentioning

confidence: 99%

LSPR Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Ayareh

Moradi

2022

Preprint

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“…Thus, this type of sensing mechanism provides an additional detecting ability, resulting in better sensitivity compared with other conventional SPR sensors. 17 Noble metallic thin films such as Au and Ag are typical materials frequently used for plasmonic application because of their high conductivity and chemical stability. However, these metals show a low MO response.…”

Section: Introductionmentioning

confidence: 99%

Au/NiFe/M(Au, MoS2, graphene) trilayer magnetoplasmonics DNA-hybridized sensors with high record of sensitivity

et al. 2017

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The demonstration of biosensors based on the surface plasmon effect holds promise for future high-sensitive electrodeless biodetection. The combination of magnetic effects with surface plasmon waves brings additional freedom to improve sensitivity and signal selectivity. Stacking biosensors with two-dimensional (2-D) materials, e.g., graphene (Gr) and MoS2, can influence plasmon waves and facilitate surface physiochemical properties as additional versatility aspects. We demonstrate magnetoplasmonic biosensors through the detuning of surface plasmon oscillation modes affected by magnetic effect via the presence of the NiFe (Py) layer and different light absorbers of Gr, MoS2, and Au ultrathin layers in three stacks of Au/Py/M(MoS2, Gr, Au) trilayers. We found minimum reflection, resonance angle shift, and transverse magneto-optical Kerr effect (TMOKE) responses of all sensors in the presence of the ss-DNA monolayer. Very few changes of ∼5×10-7 in the ss-DNA's refractive index result in valuable TMOKE response. We found that the presence of three-layer Gr and two-layer MoS2 on top of the Au/Py bilayer can dramatically increase the sensitivity by nine and four times, respectively, than the conventional Au/Co/Au trilayer. Our results show the highest reported DNA sensitivity based on the coupling of light with 2-D materials in magnetoplasmonic devices.

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Magnetoplasmonics

Belotelov

Kalish

Zvezdin

2019

Digital Encyclopedia of Applied Physics

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Plasmonics has been attracting considerable interest as it allows localization of light at nanoscale dimensions. A breakthrough in integrated nanophotonics can be obtained by fabricating plasmonic functional materials. In particular, magneto‐optical materials are appealing as they may provide ultrafast control of laser light and surface plasmons via an external magnetic field. In this article, we demonstrate that it provides a significant enhancement of magneto‐optical effects as proved by increase in the intensity and polarization rotation effects by several orders of magnitude. Plasmonic structures can be operated in transmission, so that it may be implemented in devices for telecommunication, plasmonic circuitry, magnetic field sensing, and all‐optical magnetic data storage.

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Enhancement of magneto-optical Kerr response by LSPR in magneto plasmonic nanostructures for biological sensors

Cited by 10 publications

References 26 publications

LSPR Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

LSPR Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Au/NiFe/M(Au, MoS2, graphene) trilayer magnetoplasmonics DNA-hybridized sensors with high record of sensitivity

Magnetoplasmonics

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