Dispersible Conjugated Polymer Nanoparticles as Biointerface Materials for Label-Free Bacteria Detection
| Autor: | Alain Louis-Joseph, Shiwei Ren, Ahmed O. El-Gendy, Waleed M.A. El Rouby, Nada Elgiddawy, Abderrahim Yassar, Hélène Sauriat-Dorizon, Hafsa Korri-Youssoufi, Ahmed A. Farghali |
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| Přispěvatelé: | Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique des interfaces et des couches minces [Palaiseau] (LPICM), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de synthèse organique (DCSO), École polytechnique (X)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), National Research Center [Dokki, Egypt], Beni-Suef University |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
conjugated block copolymer Polymers Surface Properties core-shell nanoparticle Nanoparticle Biointerface Nanotechnology Biocompatible Materials 02 engineering and technology Conjugated system biosensor 010402 general chemistry 01 natural sciences Surface-Active Agents Escherichia coli impedimetric biosensor E. coli detection General Materials Science Particle Size Label free chemistry.chemical_classification Bacteria biology [SDE.IE]Environmental Sciences/Environmental Engineering business.industry mannose self-assembly Polymer 021001 nanoscience & nanotechnology Food safety biology.organism_classification 6. Clean water 3. Good health 0104 chemical sciences [CHIM.POLY]Chemical Sciences/Polymers chemistry Nanoparticles 0210 nano-technology business conjugated polymer nanoparticle Biosensor |
| Zdroj: | ACS Applied Materials & Interfaces ACS Applied Materials & Interfaces, Washington, D.C. : American Chemical Society, 2020, 12 (36), pp.39979-39990. ⟨10.1021/acsami.0c08305⟩ |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.0c08305⟩ |
| Popis: | International audience; Fast and efficient identification of bacterial pathogens in water and biological fluids is an important issue in medical, food safety, and public health concerns that requires low-cost and efficient sensing strategies. Impedimetric sensors are promising tools for monitoring bacteria detection because of their reliability and ease-of-use. We herein report a study on new biointerface-based amphiphilic poly(3-hexylthiophene)-b-poly(3-triethylene-glycol-thiophene), P3HT-b-P3TEGT, for label-free impedimetric detection of Escherichia coli (E. coli). This biointerface is fabricated by the self-assembly of P3HT-b-P3TEGT into core–shell nanoparticles, which was further decorated with mannose, leading to an easy-to-use solution-processable nanoparticle material for biosensing. The hydrophilic block P3TEGT promotes antifouling and prevents nonspecific interactions, while improving the ionic and electronic transport properties, thus enhancing the electrochemical-sensing capability in aqueous solution. Self-assembly and micelle formation of P3HT-b-P3TEGT were analyzed by 2D-NMR, Fourier transform infrared, dynamic light scattering, contact angle, and microscopy characterizations. Detection of E. coli was characterized and evaluated using electrochemical impedance spectroscopy and optical and scanning electron microscopy techniques. The sensing layer based on the mannose-functionalized P3HT-b-P3TEGT nanoparticles demonstrates targeting ability toward E. coli pili protein with a detection range from 103 to 107 cfu/mL, and its selectivity was studied with Gram(+) bacteria. Application to real samples was performed by detection of bacteria in tap and the Nile water. The approach developed here shows that water/alcohol-processable-functionalized conjugated polymer nanoparticles are suitable for use as electrode materials, which have potential application in fabrication of a low-cost, label-free impedimetric biosensor for the detection of bacteria in water. |
| Databáze: | OpenAIRE |
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