Flexible electromagnetic sensor with inkjet-printed silver nanoparticles on pet substrate for chemical and biomedical applications




HIGHLIGHTS
  • What: For this article a low-cost compact and inkjet-printed electromagnetic sensor was investigated for its chemical and biomedical applications. In this article, an economical, compact, contactless, and flexible electromagnetic sensor was presented, which was used to detect and estimate variation in concentrations of chemicals (ethanol and methanol) and biochemicals (hydrocortisone – a chemical derivative of cortisol, a biomarker of stress and cardiovascular effects).
  • Who: Muhammad Usman Ejaz and colleagues from the Dyson Institute of Engineering and Technology, Malmesbury , RP, UK School of Electronic Engineering and Computer Science, Queen Mary University of London have published the Article: Flexible Electromagnetic Sensor with Inkjet-PrintedSilver Nanoparticles on PET Substrate for Chemical andBiomedical Applications, in the Journal: Sensors 2024, 24, 6526. of /2024/
  • How: When the sample under investigation is introduced into the sensing device a change in electromagnetic boundary conditions occurs resulting in resonant-frequency and quality-factor shifts.
SUMMARY

    In general, these sensing devices have higher accuracy and sensitivity, as the measurement principle is based on a shift in resonant frequency or a variation in the quality factor of the given design. A complete sensor structure with split-ring resonators can be regarded as a series of RLC resonance circuits, for which the resonance frequency can be formalized as f= 1 √ 2π LC 3 of 19 Of 19 After the investigation of prototypes with the Rogers non-flexible substrates, the sensor structure with the PET substrate was investigated for microfluidic applications using ethanol and methanol samples in aqueous solutions, and for healthcare applications hydrocortisone samples were investigated. In short, the resonant frequency increased with the increase in the concentration of ethanol, methanol, and hydrocortisone in their corresponding samples. In the case of the flexible substrate, the linear variation in the resonant frequency was still perceptible with variations in the concentration of the ethanol and methanol, and also with variations in the content of the hydrocortisone in the provided samples. Of 19 This work This work This work Electromagnetic resonators and structures provide an appealing solution for microfluidic applications with sensors having high sensitivity for concentration estimation and detection of various chemicals and biochemicals. The sensor design showed the consistent behavior of a significant increase in resonant frequency in response to an increase in the concentration of ethanol, methanol, and hydrocortisone in the prepared samples. In the case of the ethanol and methanol, a shift in resonant frequency of more than 50 MHz was observed with a change in concentration by 10%, whereas in the case of hydrocortisone the shift was smaller, due to less variation in electrical permittivity with an increase in concentration. @@

LAY DEFINITIONS
  • Split-ring resonator: A split-ring resonator is an artificially produced structure common to metamaterials. Their purpose is to produce the desired magnetic susceptibility in various types of metamaterials up to 200 terahertz
  • Substrate: A wafer (slice or substrate) is a thin slice of semiconductor material, such as a crystalline silicon, used in electronics for the fabrication of integrated circuits and in photovoltaics for conventional, wafer-based solar cells. The wafer serves as the substrate for microelectronic devices built in and over the wafer and undergoes many microfabrication process steps such as doping or ion implantation, etching, deposition of various materials, and photolithographic patterning
  • PET: Animals kept by humans for companionship and enjoyment, as opposed to DOMESTIC ANIMALS such as livestock or farm animals, which are kept for economic reasons.
  • Nanoparticles: Artificial, single or multilaminar vesicles (made from lecithins or other lipids) that are used for the delivery of a variety of biological molecules or molecular complexes to cells, for example, drug delivery and gene transfer. They are also used to study membranes and membrane proteins
  • hydrocortisone: Hydrocortisone is the name for the hormone cortisol when supplied as a medication. Uses include conditions such as adrenocortical insufficiency, adrenogenital syndrome, high blood calcium, thyroiditis, rheumatoid arthritis, dermatitis, asthma, and COPD
  • Sensor: In the broadest definition, a sensor is a device, module, machine, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a computer processor. A sensor is always used with other electronics
  • Polydimethylsiloxane: Polydimethylsiloxane (PDMS) belongs to a group of polymeric organosilicon compounds that are commonly referred to as silicones. PDMS is the most widely used silicon-based organic polymer due to its versatility and properties leading to many applications

Licence: cc-by

Site reference: https://www.mdpi.com/1424-8220/24/20/6526/pdf?version=1728648068

DOI reference: https://www.doi.org/10.3390/s24206526

Summary powered by SciencePOD SUMMSci Version version 5.5 (C) 2023 Context powered by www.wikipedia.org

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source https://magazine.sciencepod.net/flexible-electromagnetic-sensor-with-inkjet-printed-silver-nanoparticles-on-pet-substrate-for-chemical-and-biomedical-applications/

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