Layered Architectural Fabrication of a Novel Sulfite Nanobiosensor by Encapsulation of Sulfite Oxidase on a Polypyrrole-Multiwalled Carbon Nanotubes Composite Decorated with Platinum Nanoparticles.

Nafion Pt nanoparticles amperometric detection multiwalled carbon nanotubes sulfite sulfite oxidase

Journal

Small (Weinheim an der Bergstrasse, Germany)

ISSN: 1613-6829

Titre abrégé: Small

Pays: Germany

ID NLM: 101235338

Informations de publication

Date de publication:
19 Oct 2023

Historique:

revised: 14 09 2023

received: 26 06 2023

medline: 20 10 2023

pubmed: 20 10 2023

entrez: 19 10 2023

Statut: aheadofprint

Résumé

The fabrication of a highly selective and ultrasensitive sulfite nanobiosensor based on a layered architectural fabrication aided by the encapsulation of sulfite oxidase (SOx) in Nafion (Naf) matrix on a multiwalled carbon nanotubes-polypyrrole (MWCNTs-PPy) composite decorated with platinum nanoparticles (PtNPs) is described. The MWCNTs are deposited in the inner layer on a Pt electrode during electropolymerization of pyrrole (Py), followed by decoration with a PtNPs layer and subsequent encapsulation of SOx with Naf in the third layer capped with a fourth thin PtNPs layer. Images obtained by field emission scanning electron microscopy (FESEM) reveal that high-density PtNPs are deposited onto the 3D nanostructured inner MWCNTs-PPy layer and the electrochemical behavior is investigated. A large surface area provided by the incorporation of MWCNTs in the composite and decoration with PtNPs enables increased SOx loading, SOx retention, and substantial improvement in sensing performance. The resulting layered PtNPs/SOx-Naf/PtNPs/MWCNTs-PPy nanobiosensor exhibits a fast response time (within 3 s), a linear calibration range of 20 nmm - 6 m with an excellent sensitivity of 71 µA mm

Identifiants

DOI: 10.1002/smll.202305333 PMID: 37857587

pubmed: 37857587

doi: 10.1002/smll.202305333

doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

Pagination

e2305333

Informations de copyright

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