Publications by authors named "Sh Nadzirah"

The performance of the graphene-based field-effect transistor (FET) as a biosensor is based on the output drain current (I). In this work, the signal-to-noise ratio (SNR) was investigated to obtain a high-performance device that produces a higher I value. Using the finite element method, a novel top-gate FET was developed in a three-dimensional (3D) simulation model with the titanium dioxide-reduced graphene oxide (TiO-rGO) nanocomposite as the transducer material, which acts as a platform for biosensing application.

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Since diagnostic laboratories handle large COVID-19 samples, researchers have established laboratory-based assays and developed biosensor prototypes. Both share the same purpose; to ascertain the occurrence of air and surface contaminations by the SARS-CoV-2 virus. However, the biosensors further utilize internet-of-things (IoT) technology to monitor COVID-19 virus contamination, specifically in the diagnostic laboratory setting.

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The E6 region has higher protuberant probability annealing than consensus probe focusing on another region in the human papillomavirus (HPV) genome in terms of detection and screening method. Here, we designed the first multiple virus single-stranded deoxyribonucleic acid (ssDNA) for multiple detections in an early phase of screening for cervical cancer in the E6 region and became a fundamental evolution of detection electrochemical HPV biosensor. Gene profiling of the virus ssDNA sequences has been carried by high-end bioinformatics tools such as GenBank, Basic Local Alignment Searching Tools (BLAST), and Clustal OMEGA in a row.

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The importance of nanotechnology in medical applications especially with biomedical sensing devices is undoubted. Several medical diagnostics have been developed by taking the advantage of nanomaterials, especially with electrical biosensors. Biosensors have been predominantly used for the quantification of different clinical biomarkers toward detection, screening, and follow-up the treatment.

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Biosensors operating based on electrical methods are being accelerated toward rapid and efficient detection that improve the performance of the device. Continuous study in nano- and material-sciences has led to the inflection with properties of nanomaterials that fit the trend parallel to the biosensor evolution. Advancements in technology that focuses on nano-hybrid are being used to develop biosensors with better detection strategies.

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Article Synopsis
  • - The study introduces a titanium dioxide nanoparticle-mediated resistive biosensor designed for quick and efficient detection of DNA fragments from E. coli O157:H7, overcoming the lengthy traditional methods that can take over three days.
  • - Utilized the sol-gel method for synthesizing nanoparticles and microlithography for sensor electrode fabrication, allowing for measuring current-voltage interactions without needing to amplify DNA fragments.
  • - The biosensor demonstrates high sensitivity (1.67 × 10 Ω/M) and a low detection limit (1 × 10 M of DNA), capable of delivering results within just 15 minutes from a small sample volume of 1 μL, showcasing excellent repeatability and reproducibility.
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Nanoparticle-mediated bio-sensing promoted the development of novel sensors in the front of medical diagnosis. In the present study, we have generated and examined the potential of titanium dioxide (TiO2) crystalline nanoparticles with aluminium interdigitated electrode biosensor to specifically detect single-stranded E.coli O157:H7 DNA.

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