Premium
Apoferritin‐templated biosynthesis of manganese nanoparticles and investigation of direct electron transfer of MnNPs–HsAFr at modified glassy carbon electrode
Author(s) -
Rafipour Ronak,
Kashanian Soheila,
Hashemi Sadegh,
Omidfar Kobra,
Ezzati Nazhad Dolatabadi Jafar
Publication year - 2016
Publication title -
biotechnology and applied biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 70
eISSN - 1470-8744
pISSN - 0885-4513
DOI - 10.1002/bab.1466
Subject(s) - glutaraldehyde , carbodiimide , cyclic voltammetry , electron transfer , charge transfer coefficient , nanoparticle , electrode , fluorescence , electrochemistry , manganese , chemistry , nuclear chemistry , inorganic chemistry , materials science , nanotechnology , photochemistry , polymer chemistry , organic chemistry , physics , quantum mechanics
Manganese nanoparticles (MnNPs) were created within horse spleen apoferritin (HsAFr) cavity nanotemplates. Transmission electron microscopy revealed the particle size to be 6 nm. Intrinsic fluorescence data showed that the mineralization acted as a quencher of the HsAFr fluorescence, and extrinsic fluorescence data revealed that the hydrophobic binding site at the surface of HsAFr was not changed. Finally, the MnNP‐HsAFr was immobilized onto multiwalled carbon nanotubes entrapped into chitosan (CS) matrices by through sequential 1‐ethyl‐3‐(3‐dimethylaminopropyl) carbodiimide– N ‐hydroxysuccinimide and glutaraldehyde coupling. The MnNPs–HsAFr immobilized on CNT‐CS/GC electrode was characterized by cyclic voltammetry. This charge transfer coefficient (α) and the exchange current ( i 0 ) of MnNPs–HsAFr immobilized on modified electrode in 0.1 M phosphate solution (pH 7.5) were found to be 0.57 and 0.48 μA, respectively.