Recent Developments for the Detection of Escherichia Coli Biosensors Based on Nano-Objects—A Review

Abstract

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Silicon nanowires-based biosensors for the electrical detection of Escherichia coli

“…The sensitivity we estimated with our sensor was 83 µA per decade of CFU/mL. This result is very promising for this type of biosensor for direct electrical detection at low levels of bacterial contamination (10 2 CFU/ml) required to ensure food safety (Huang et al, 2021) (Benserhir et al, 2022).…”

“…A number of methods have been demonstrated for bacterial detection, including nanomechanical cantilever sensing (Ndieyira et al, 2008), surfaceenhanced Raman spectroscopy (Premasiri et al, 2005), and quartz crystal microbalance-based sensors (Bao et al, 1996). In another way, a high number of biosensors have also been developed for the detection of bacteria, based on electrochemical transduction methods less time-consuming and more sensitive than other techniques such as amperometry, impedance spectroscopy or potentiometry (Ahmed et al, 2014); (Andrade et al, 2015) (Huang et al, 2011) (Kaur et al, 2017) (Benserhir et al, 2022). Another detection method based on electrical measurements has been developed using classical electronics devices (MOSFET, resistors) as sensors (So et al, 2008) (Zhang et al, 2012).…”

Electrochemical Dna-Nano Biosensor for the Detection of Cervical Cancer-Causing HPV-16 Using Ultrasmall Fe3O4-Au Core-Shell Nanoparticles

“…Direct (label-free) electrochemical DNA recognition can be achieved by monitoring the physicochemical changes due to DNA hybridization onto the surface of the detector [35]. Combining the electrical transduction with nanotechnology can potentially make electrochemical sensors more sensitive, economical and portable compared to classical label-free physical and optical transduction methods [36]. Since no additional labeling step is necessary for the sample in this case, the sensing protocol is simpler [37].…”