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• W2912924632 abstract "Abstract Polyethylenimine (PEI)-decorated gold nanoparticles (AuNP) were electrodeposited on conductive surfaces in one-step procedure. Solution-state NMR evidenced that chloride from PEI.HCl was partially exchanged by AuCl4− prior to AuNP formation. XPS studies indicated the presence of Au° together with the interaction between AuNP with nitrogen atoms of the PEI polymer. The particle size by DLS was 49 nm. The electrochemical behavior of bare electrode and of glassy carbon electrode modified with PEI-decorated AuNP was compared using [Fe(CN)6]3-/4- redox probe, to determine the potential role of the nanomaterial and of the polymer in the detection of proteins. The most relevant experimental variables from cyclic voltammetry (CV), square-wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS) were used for the characterization of protein uptake. The adsorption by electrostatic interaction between the biomolecules and the positively charged polymer (PEIH+) affected negatively the current response (Ip) of the probe, especially when the negatively charged protein was involved. This platform resulted adequate to immobilize proteins and to characterize this process, for further applications as a tool in bioanalysis or biotechnology." @default.
• W2912924632 created "2019-02-21" @default.
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• W2912924632 date "2019-04-01" @default.
• W2912924632 modified "2023-10-17" @default.
• W2912924632 title "Linear polyethylenimine-decorated gold nanoparticles: One-step electrodeposition and studies of interaction with viral and animal proteins" @default.
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• W2912924632 doi "https://doi.org/10.1016/j.electacta.2019.01.154" @default.
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