Open AccessFe Doped Mno<sub>2</sub> Nanostructured Thin Films: Synthesis and Characterization for Biosensor applications
Author(s) -
Muslima Zahan,
Jiban Podder
Publication year - 2020
Publication title -
bangladesh journal of physics
Language(s) - English
Resource type - Journals
ISSN - 1816-1081
DOI - 10.3329/bjphy.v27i1.49722
Subject(s) - materials science , thin film , doping , band gap , substrate (aquarium) , crystallite , analytical chemistry (journal) , biosensor , deposition (geology) , manganese , spray pyrolysis , nanotechnology , chemical engineering , optoelectronics , metallurgy , chemistry , chromatography , paleontology , oceanography , sediment , engineering , biology , geology
Iron (Fe), a magnetic transition metal, doped manganese oxide (MnO2) nanostructured thin films were deposited onto glass substrates by a spray pyrolysis deposition technique at 450oC substrate temperature for glucose sensing performance. Fe concentration greatly affects the film surface morphology. The film was found to be more compact and porous for 4 at % Fe doping. The glucose response was measured by electrical four probe method using the pure MnO2 and 2, 4, 6, 8 at% Fe doped MnO2 thin films as an active electrode. It was determined that 4 at % Fe: MnO2 thin film with 20 nm crystallite size has high sensitivity, fast glucose response and recovery time. Optical band gap measurement indicated that the sensitivity increased as the band gap decreased up to 4 at% Fe concentration. The highest glucose sensing response was recorded about 29 % in 5 minutes.
Bangladesh Journal of Physics, 27(1), 1-12, June 2020