Influence of aspect ratio of magnetite coated gold nanorods in hydrogen peroxide sensing

Alaa Munshi; Diwei Ho; Martin Saunders; Vipul Agarwal; Colin Raston; K Iyer

doi:10.1016/j.snb.2016.05.090

Influence of aspect ratio of magnetite coated gold nanorods in hydrogen peroxide sensing

Alaa Munshi, Diwei Ho, Martin Saunders, Vipul Agarwal, Colin Raston, K Iyer

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Hydrogen peroxide (H₂O₂) sensing has many biomedical, healthcare and industrial applications. However, H₂O₂ sensors are limited in sensitivity and selectivity. Here, we investigate the application of magnetite (Fe₃O₄) coated gold nanorods (GNRs) of two aspect ratios as active glassy carbon electrode modifiers for the fabrication of H₂O₂ electrochemical sensors. We show that the GNR-Fe₃O₄ nanohybrids of a smaller aspect ratio (1.6) outperform the longer GNRs (aspect ratio 7.5) in the electrochemical detection of H₂O₂, as measured using cyclic voltammetry (CV) and amperometric techniques. The synthesized GNR-Fe₃O₄ in this study also demonstrated high sensitivity and selectivity, with performance surpassing previously reported H₂O₂ sensors.

Original language	English
Pages (from-to)	492-497
Number of pages	6
Journal	Sensors and Actuators B: Chemical
Volume	235
DOIs	https://doi.org/10.1016/j.snb.2016.05.090
Publication status	Published - 2016

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title = "Influence of aspect ratio of magnetite coated gold nanorods in hydrogen peroxide sensing",

abstract = "Hydrogen peroxide (H2O2) sensing has many biomedical, healthcare and industrial applications. However, H2O2 sensors are limited in sensitivity and selectivity. Here, we investigate the application of magnetite (Fe3O4) coated gold nanorods (GNRs) of two aspect ratios as active glassy carbon electrode modifiers for the fabrication of H2O2 electrochemical sensors. We show that the GNR-Fe3O4 nanohybrids of a smaller aspect ratio (1.6) outperform the longer GNRs (aspect ratio 7.5) in the electrochemical detection of H2O2, as measured using cyclic voltammetry (CV) and amperometric techniques. The synthesized GNR-Fe3O4 in this study also demonstrated high sensitivity and selectivity, with performance surpassing previously reported H2O2 sensors.",

author = "Alaa Munshi and Diwei Ho and Martin Saunders and Vipul Agarwal and Colin Raston and K Iyer",

year = "2016",

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T1 - Influence of aspect ratio of magnetite coated gold nanorods in hydrogen peroxide sensing

AU - Munshi, Alaa

AU - Ho, Diwei

AU - Saunders, Martin

AU - Agarwal, Vipul

AU - Raston, Colin

AU - Iyer, K

PY - 2016

Y1 - 2016

N2 - Hydrogen peroxide (H2O2) sensing has many biomedical, healthcare and industrial applications. However, H2O2 sensors are limited in sensitivity and selectivity. Here, we investigate the application of magnetite (Fe3O4) coated gold nanorods (GNRs) of two aspect ratios as active glassy carbon electrode modifiers for the fabrication of H2O2 electrochemical sensors. We show that the GNR-Fe3O4 nanohybrids of a smaller aspect ratio (1.6) outperform the longer GNRs (aspect ratio 7.5) in the electrochemical detection of H2O2, as measured using cyclic voltammetry (CV) and amperometric techniques. The synthesized GNR-Fe3O4 in this study also demonstrated high sensitivity and selectivity, with performance surpassing previously reported H2O2 sensors.

AB - Hydrogen peroxide (H2O2) sensing has many biomedical, healthcare and industrial applications. However, H2O2 sensors are limited in sensitivity and selectivity. Here, we investigate the application of magnetite (Fe3O4) coated gold nanorods (GNRs) of two aspect ratios as active glassy carbon electrode modifiers for the fabrication of H2O2 electrochemical sensors. We show that the GNR-Fe3O4 nanohybrids of a smaller aspect ratio (1.6) outperform the longer GNRs (aspect ratio 7.5) in the electrochemical detection of H2O2, as measured using cyclic voltammetry (CV) and amperometric techniques. The synthesized GNR-Fe3O4 in this study also demonstrated high sensitivity and selectivity, with performance surpassing previously reported H2O2 sensors.

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DO - 10.1016/j.snb.2016.05.090

M3 - Article

SN - 0925-4005

VL - 235

SP - 492

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JO - Sensors and Actuators B: Chemical

JF - Sensors and Actuators B: Chemical

ER -

Influence of aspect ratio of magnetite coated gold nanorods in hydrogen peroxide sensing

Abstract

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