Electrochemical Sensors Based on MoS x -Functionalized Laser-Induced Graphene for Real-Time Monitoring of Phenazines Produced by Pseudomonas aeruginosa.

Autor: Zhou K; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA, 16802, USA.; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA., Kammarchedu V; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA, 16802, USA.; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA., Butler D; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA, 16802, USA.; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA., Soltan Khamsi P; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA, 16802, USA.; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA., Ebrahimi A; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA, 16802, USA.; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA.; Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.
Jazyk: angličtina
Zdroj: Advanced healthcare materials [Adv Healthc Mater] 2022 Oct; Vol. 11 (19), pp. e2200773. Date of Electronic Publication: 2022 Aug 28.
DOI: 10.1002/adhm.202200773
Abstrakt: Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen causing infections in blood and implanted devices. Traditional identification methods take more than 24 h to produce results. Molecular biology methods expedite detection, but require an advanced skill set. To address these challenges, this work demonstrates functionalization of laser-induced graphene (LIG) for developing flexible electrochemical sensors for P. aeruginosa based on phenazines. Electrodeposition as a facile approach is used to functionalize LIG with molybdenum polysulfide (MoS x ). The sensor's limit of detection (LOD), sensitivity, and specificity are determined in broth, agar, and wound simulating medium (WSM). Control experiments with Escherichia coli, which does not produce phenazines, demonstrate specificity of sensors for P. aeruginosa. The LOD for pyocyanin (PYO) and phenazine-1-carboxylic acid (PCA) is 0.19 × 10 -6  and 1.2 × 10 -6  m, respectively. Furthermore, the highly stable sensors enable real-time monitoring of P. aeruginosa biofilms over several days. Comparing square wave voltammetry data over time shows time-dependent generation of phenazines. In particular, two configurations-"Normal" and "Flipped"-are studied, showing that the phenazines time dynamics vary depending on how cells interact with sensors. The reported results demonstrate the potential of the developed sensors for integration with wound dressings for early diagnosis of P. aeruginosa infection.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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