Binder-less and free-standing Co–Fe metal nanoparticles-decorated PVdF-HFP nanofiber membrane as an electrochemical probe for enzyme-less glucose sensors |
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Authors: | Saravanan J Vignesh A Shah Syed Shaheen Aziz Md Abdul Pannipara Mehboobali Al-Sehemi Abdullah G Phang Siew-Moi Ng Fong-Lee Abdul Bakrudeen Ali Ahmed kumar G Gnana |
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Institution: | 1.Department of Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, India ;2.Centre of Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia ;3.Department of Chemistry, King Khalid University, Abha, 61413, Saudi Arabia ;4.Institute of Ocean and Earth Sciences (IOES), University of Malaya, 50603, Kuala Lumpur, Malaysia ;5.Faculty of Applied Sciences, UCSI University, 56000, Kuala Lumpur, Malaysia ;6.Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam ; |
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Abstract: | Co–Fe bimetallic nanoparticles-affixed polyvinylidene fluoride-co-hexafluoropropylene (PVdF-HFP) nanofiber membrane is fabricated using the electrospinning and chemical reduction techniques. The semicrystalline polymeric backbone decorated with the highly crystalline Co–Fe bimetallic nanoparticles enunciates the mechanical integrity, while the incessant and swift electron mobility is articulated with the consistent dissemination of bimetallic nanoparticles on the intersected and multi-layered polymeric nanofibers. The diffusion and adsorption of glucose are expedited in the extended cavities and porosities of as-formulated polymeric nanofibers, maximizing the glucose utilization efficacy, while the uniformly implanted Co4+/Fe3+ active centers on PVdF-HFP nanofibers maximize the electrocatalytic activity toward glucose oxidation under alkaline regimes. Thus, the combinative sorts including nanofiber and nanocomposite strategies of PVdF-HFP/Co–Fe membrane assimilate the enzyme-less electrochemical glucose detection concerts of high sensitivity (375.01 μA mM?1 cm?2), low limit of detection (0.65 μm), and wide linear range (0.001 to 8 mM), outfitting the erstwhile enzyme-less glucose detection reports. Additionally, the endowments of high selectivity and real sample glucose-sensing analyses of PVdF-HFP/Co–Fe along with the binder-less and free-standing characteristics construct the state-of-the-art paradigm for the evolution of affordable enzyme-less electrochemical glucose sensors.
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