Detection of SalmonellaTyphimurium in water and meat using nanosensor

• Published in: Journal of physics. Conference series 2021-09, Vol.1999 (1), p.12024
• Main Authors: Al-Atafy, Qsay kamil Hadi, Al-Janabi, Jihad Deiyb Mahal, Al-Mayahi, Basim Abd Al-Hassan
• Format: Article
• Language: English
• Subjects: Atomic force microscopes; Atomic force microscopy; Bacteria; Electrical measurement; Electrical properties; Engraving; Glass substrates; Meat; Microorganisms; Nanosensors; Optical properties; Physics; Remote monitoring; Room temperature; Surface properties; Thin films; Vacuum evaporation; Zinc oxide
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1999/1/012024

The sensor dimensions are chosen (10 * 10 mm) and manufactured by the laser engraving system as a dimension of the fine copper die and installed on the glass substrate coated with the nano material and the mould is coated with silver by thermal vacuum evaporation and the fixation of the connecting electrodes. The surface properties and the structural, optical and electrical properties of the thin films were studied. Samples prepared with an X-ray diffraction device (XRD) were examined to ensure the presence of elements or compounds entering the coating layer, and an examination with an atomic force microscope (AFM) to identify the crystal size of the coating compound and a scanning electron microscope. Field (SEM) is to prove the existence and proportions of active ingredients. The UV nano composite spectra were studied to investigate the optical behavior of ZnO-rGO membranes (transmittance and absorption). The sensing properties were determined by measuring changes in the conductivity of the prepared bacteria present in water and flesh using current and voltage measurement I-V by two mass device methods and the results were accurate. The results proved that ZnO-rGO has high sensitivity towards bacteria and is made of thin films of nano composites and has a high performance to detect bacteria in water and meat. The goal of this study is to design and manufacture a nano sensor with high efficiency to detect a type of bacteria that the thin films deposited in the vacuum have properties excellent for accurate detection. The microbial detection devices based on thin materials are inexpensive and do not require trainers to use them, and they operate at room temperature. Thus they have the advantage of remote positioning and monitoring in dangerous places.