Surface Acoustic Wave Based Magnetic Sensors

Rowais, H. Al; Kosel, Jürgen

doi:10.5772/55220

Cited by 7 publications

(3 citation statements)

References 66 publications

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“…With, 127.68° Y-X-axis-rotated cut, X-propagating LiNbO 3 is the most widely used substrate [80,137,193,221,[227][228][229] because of its high electromechanical coupling coefficient [230]. When an alternating current is applied to an IDT at the resonance frequency, the substrate undergoes mechanical displacement due to the presence of an electric field and the piezoelectric effect [231]. A SAW is generated at the IDT and travels along the surface of the piezoelectric material until it encounters the PDMS channel, where it leaks into the microchannel, generating pressure fluctuations within the fluid [225].…”

Section: Acoustic Mixingmentioning

confidence: 99%

A review on microfluidic-assisted nanoparticle synthesis, and their applications using multiscale simulation methods

et al. 2023

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Recent years have witnessed an increased interest in the development of nanoparticles (NPs) owing to their potential use in a wide variety of biomedical applications, including drug delivery, imaging agents, gene therapy, and vaccines, where recently, lipid nanoparticle mRNA-based vaccines were developed to prevent SARS-CoV-2 causing COVID-19. NPs typically fall into two broad categories: organic and inorganic. Organic NPs mainly include lipid-based and polymer-based nanoparticles, such as liposomes, solid lipid nanoparticles, polymersomes, dendrimers, and polymer micelles. Gold and silver NPs, iron oxide NPs, quantum dots, and carbon and silica-based nanomaterials make up the bulk of the inorganic NPs. These NPs are prepared using a variety of top-down and bottom-up approaches. Microfluidics provide an attractive synthesis alternative and is advantageous compared to the conventional bulk methods. The microfluidic mixing-based production methods offer better control in achieving the desired size, morphology, shape, size distribution, and surface properties of the synthesized NPs. The technology also exhibits excellent process repeatability, fast handling, less sample usage, and yields greater encapsulation efficiencies. In this article, we provide a comprehensive review of the microfluidic-based passive and active mixing techniques for NP synthesis, and their latest developments. Additionally, a summary of microfluidic devices used for NP production is presented. Nonetheless, despite significant advancements in the experimental procedures, complete details of a nanoparticle-based system cannot be deduced from the experiments alone, and thus, multiscale computer simulations are utilized to perform systematic investigations. The work also details the most common multiscale simulation methods and their advancements in unveiling critical mechanisms involved in nanoparticle synthesis and the interaction of nanoparticles with other entities, especially in biomedical and therapeutic systems. Finally, an analysis is provided on the challenges in microfluidics related to nanoparticle synthesis and applications, and the future perspectives, such as large-scale NP synthesis, and hybrid formulations and devices. Graphical abstract

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Section: Acoustic Mixingmentioning

confidence: 99%

A review on microfluidic-assisted nanoparticle synthesis, and their applications using multiscale simulation methods

et al. 2023

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“…It is possible to eliminate the overlap of descriptor signals on the chip because the layers of the meander that perform certain The number of meanders is not important. In a certain range of parameters, it is possible to assemble on a single layer an enthrakometer, a SAW sensor with counter-pin geometry, a magnetoresistor or a magnetostrictive sensor (that in recent years was repeatedly hybridized with a SAW sensor with the same geometry [232]), and a microfluidic set of channels located between meanders of the sensor layers, or within them, or above them. Compatibility of magnetic sensors of such geometry with liquid media was recently demonstrated in NASA [233], indicating a trend of introducing them into microfluidics and ferrohydrodynamics [234]).…”

Section: Towards Multiparametric Chemosensing and Physico-chemical Sensing On The Collard Enthrakometer Surfacementioning

confidence: 99%

Microwave Enthrakometric Labs-On-A-Chip and On-Chip Enthrakometric Catalymetry: From Non-Conventional Chemotronics Towards Microwave-Assisted Chemosensors

Градов

Gradova

2019

Chemosensors

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A unique chemical analytical approach is proposed based on the integration of chemical radiophysics with electrochemistry at the catalytically-active surface. This approach includes integration of: radiofrequency modulation polarography with platinum electrodes, applied as film enthrakometers for microwave measurements; microwave thermal analysis performed on enthrakometers as bolometric sensors; catalytic measurements, including registration of chemical self-oscillations on the surface of a platinum enthrakometer as the chemosensor; measurements on the Pt chemosensor implemented as an electrochemical chip with the enthrakometer walls acting as the chip walls; chemotron measurements and data processing in real time on the surface of the enthrakometric chip; microwave electron paramagnetic resonance (EPR) measurements using an enthrakometer both as a substrate and a microwave power meter; microwave acceleration of chemical reactions and microwave catalysis оn the Pt surface; chemical generation of radio- and microwaves, and microwave spin catalysis; and magnetic isotope measurements on the enthrakometric chip. The above approach allows one to perform multiparametric physical and electrochemical sensing on a single active enthrakometric surface, combining the properties of the selective electrochemical sensor and an additive physical detector.

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“…An important step in this development is based on the use of the giant magnetoimpedance (GMI) effect. GMI elements can be fabricated in the shape of microwires, ribbons or thin films and can be combined with surface acoustic wave (SAW) interdigital transducers (IDT), resulting in a magnetic sensor design that has the potential for miniaturization, integration, low cost, passive interrogation, high sensitivity, and large linear range [1].…”

Section: Section I Introductionmentioning

confidence: 99%