Electrochemical detection of amoxicillin on 2D graphene-gold nanoparticle-Lacasse bio-interfaces: Combined experimental and theoretical study

Adeniyi Olugbenga Osikoya, Francis Opoku, Penny Poomani Govender

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In this study, using self-assembly and electrostatic interactions we developed a sensitive 2D graphene-gold nanoparticles nanocomposite. Morphological and structural characterization confirmed the presence of crystalline 2D sp2 hybridized graphitic carbon material. The fabricated interface materials displayed fast electrocatalytic response to increasing molar addition of amoxicillin with linear detection range (LDR) from 4,25 × 10−1 µM – 2,92 × 102 µM while 4,25 × 10−1 µM is the detection limit (LoD) and the sensitivity was found to be 2,04 × 103 µA/µMcm−2 for GCE/Gr/AuNP/Lac fabricated bioelectrode. DFT calculations were used to determine the most stable amoxicillin configuration on Gr/AuNP electrode surface.

Original languageEnglish
Article number138278
JournalChemical Physics Letters
Volume764
DOIs
Publication statusPublished - Feb 2021

Keywords

  • 2D-materials
  • Amoxicillin
  • Antibiotic
  • DFT
  • Electrochemical biosensor
  • Gold nanoparticles
  • Graphene
  • Raman spectroscopy
  • XRD

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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