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Electrochemical biosensors utilising electron transfer in heme proteins immobilised on Fe3O4 nanoparticles.
Dongfang Cao,Pingli He,Naifei Hu +2 more
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In this paper, Fe3O4 nanoparticles cast on pyrolytic graphite (PG) electrodes were used to immobilize hemoglobin (Hb), myoglobin (Mb), and horseradish peroxidase (HRP).Abstract:
Fe3O4 nanoparticles cast on pyrolytic graphite (PG) electrodes were used to immobilize hemoglobin (Hb), myoglobin (Mb) and horseradish peroxidase (HRP). The Fe3O4 nanoparticles provided a favorable microenvironment for the proteins to directly transfer electrons with electrodes. The protein–Fe3O4 films were used to electrochemically catalyze the reduction of oxygen, trichloroacetic acid, nitrite and hydrogen peroxide, and showed a potential applicability in fabricating biosensors. Transmission electron microscopy (TEM), UV–visible absorption and reflectance absorption infrared (RAIR) spectroscopy, and cyclic and square wave voltammetry, were used to characterize the films.read more
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Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications
Eugenii Katz,Itamar Willner +1 more
TL;DR: This review describes recent advances in the synthesis of biomolecule-nanoparticle/nanorod hybrid systems and the application of such assemblies in the generation of 2D and 3D ordered structures in solutions and on surfaces.
Journal ArticleDOI
Application of Nanoparticles in Electrochemical Sensors and Biosensors
TL;DR: In this paper, a minireview of nanoparticle-based electrochemical sensors and biosensors is presented, which summarizes the main functions of nanoparticles in these sensor systems, such as the immobilization of biomolecules, the catalysis of electrochemical reactions, the enhancement of electron transfer between electrode surfaces and proteins, labeling and acting as reactant.
Journal ArticleDOI
One-pot synthesis and bioapplication of amine-functionalized magnetite nanoparticles and hollow nanospheres
TL;DR: A facile one-pot template-free method for the preparation of amine-functionalized magnetite nanoparticles and hollow nanospheres by using FeCl(3)6 H(2)O as single iron source is developed.
Journal ArticleDOI
Iron oxide nanoparticles–chitosan composite based glucose biosensor
Ajeet Kaushik,Raju Khan,Pratima R. Solanki,Pratibha Pandey,Javed Alam,Sharif Ahmad,Bansi D. Malhotra +6 more
TL;DR: The GOx/CH-Fe(3)O(4)/ITO nanocomposite bioelectrode has response time of 5s, linearity as 10-400 mgdL(-1) of glucose, sensitivity as 9.3 microA/(mgdLcm(2)) and shelf life of about 8 weeks under refrigerated conditions.
References
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Journal ArticleDOI
Direct electrochemistry of redox proteins
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Direct electron transfer between heme-containing enzymes and electrodes as basis for third generation biosensors
Lo Gorton,Annika Lindgren,Ted Larsson,Florentina-Daniela Munteanu,Tautgirdas Ruzgas,Irina G. Gazaryan +5 more
TL;DR: In this article, direct electron transfer between redox enzymes and electrodes found the basis for third generation biosensors, which were used for bioelectrochemistry of redox enzyme and electrodes.
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Preparation and Properties of Magnetite and Polymer Magnetite Nanoparticles
TL;DR: In this article, the magnetite core and polymeric shell were synthesized in a single inverse microemulsion and the particle size was varied in the range 80−320 nm by changing of the monomer concentration and water/surfactant ratio.
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Homogeneous redox catalysis of electrochemical reactions: Part V. Cyclic voltammetry
TL;DR: In this paper, the theory of homogeneous redox catalysis in the context of cyclic voltammetry is presented for the EC reaction scheme, i.e., the simplest of the mechanisms in which the initial electron-transfer process is followed by chemical reaction.