ArticleScientific reports2022
Rapid and label-free Listeria monocytogenes detection based on stimuli-responsive alginate-platinum thiomer nanobrushes.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Biosensing technologies for foodborne pathogen detection and healthcare: principles, emerging materials, and intelligent platforms.Mikrochimica acta · 2026Review
- Recent Developments onFoods (Basel, Switzerland) · 2025Review
- Polydiacetylene (PDA) Embedded Polymer-Based Network Structure for Biosensor Applications.Gels (Basel, Switzerland) · 2025Review
- Review of Detection Limits for Various Techniques for Bacterial Detection in Food Samples.Nanomaterials (Basel, Switzerland) · 2024Review
- Quartz crystal microbalance-based aptasensor integrated with magnetic pre-concentration system for detection of Listeria monocytogenes in food samples.Mikrochimica acta · 2024Article
- Electrochemical Biosensors as a Novel Platform in the Identification of Listeriosis Infection.Biosensors · 2023Review
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Authors and funding
3 authors.
Funding
Abstract
In this work, we demonstrate the development of a rapid and label-free electrochemical biosensor to detect Listeria monocytogenes using a novel stimulus-response thiomer nanobrush material. Nanobrushes were developed via one-step simultaneous co-deposition of nanoplatinum (Pt) and alginate thiomers (ALG-thiomer). ALG-thiomer/Pt nanobrush platform significantly increased the average electroactive surface area of electrodes by 7 folds and maintained the actuation properties (pH-stimulated osmotic swelling) of the alginate. Dielectric behavior during brush actuation was characterized with positively, neutral, and negatively charged redox probes above and below the isoelectric point of alginate, indicating ALG-thiomer surface charge plays an important role in signal acquisition. The ALG-thiomer platform was biofunctionalized with an aptamer selective for the internalin A protein on Listeria for biosensing applications. Aptamer loading was optimized and various cell capture strategies were investigated (brush extended versus collapsed). Maximum cell capture occurs when the ALG-thiomer/aptamer is in the extended conformation (pH > 3.5), followed by impedance measurement in the collapsed conformation (pH < 3.5). Low concentrations of bacteria (5 CFU mL
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