Dual Transduction of H2O2 Detection Using ZnO/Laser-Induced Graphene Composites
authors Zanoni, J; Moura, JP; Santos, NF; Carvalho, AF; Fernandes, AJS; Monteiro, T; Costa, FM; Pereira, SO; Rodrigues, J
nationality International
journal CHEMOSENSORS
author keywords ZnO; laser-induced graphene; photoluminescence; electrochemical properties; H2O2 sensing; biosensors
keywords HYDROGEN-PEROXIDE; ZINC-OXIDE; CARBON NANOTUBES; RAMAN-SPECTROSCOPY; GLUCOSE SENSOR; LAYER GRAPHENE; QUANTUM DOTS; LABEL-FREE; ONE-STEP; ZNO
abstract Zinc oxide (ZnO)/laser-induced graphene (LIG) composites were prepared by mixing ZnO, grown by laser-assisted flow deposition, with LIG produced by laser irradiation of a polyimide, both in ambient conditions. Different ZnO:LIG ratios were used to infer the effect of this combination on the overall composite behavior. The optical properties, assessed by photoluminescence (PL), showed an intensity increase of the excitonic-related recombination with increasing LIG amounts, along with a reduction in the visible emission band. Charge-transfer processes between the two materials are proposed to justify these variations. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy evidenced increased electron transfer kinetics and an electrochemically active area with the amount of LIG incorporated in the composites. As the composites were designed to be used as transducer platforms in biosensing devices, their ability to detect and quantify hydrogen peroxide (H2O2) was assessed by both PL and CV analysis. The results demonstrated that both methods can be employed for sensing, displaying slightly distinct operation ranges that allow extending the detection range by combining both transduction approaches. Moreover, limits of detection as low as 0.11 mM were calculated in a tested concentration range from 0.8 to 32.7 mM, in line with the values required for their potential application in biosensors.
publisher MDPI
isbn 2227-9040
year published 2021
volume 9
issue 5
digital object identifier (doi) 10.3390/chemosensors9050102
web of science category 29
subject category Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
unique article identifier WOS:000653558300001
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 3.108
5 year journal impact factor Not Available
category normalized journal impact factor percentile 66.224
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg