Array of NiMn 2 O 4 nanosheets for glucose sensing application
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Array of NiMn2O4 nanosheets for glucose sensing application Kusha Kumar Naik1,*
, Ranjan Kumar Bhuyan2, and Asish Kumar Mohapatra3
1
P.G. Department of Physics, Berhampur University, Berhampur, India Department of Physics, Government (Autonomous) College, Angul, India 3 Department of Physics, National Institute of Science and Technology, Berhampur, India 2
Received: 15 May 2020
ABSTRACT
Accepted: 14 September 2020
Herein, we report the facile and low-cost thin-film electrodeposition of Nickel Manganese Oxide (NiMn2O4) nanosheets grown on Indium Tin Oxide (ITO) substrate by Amperometric technique. The crystal structure, surface morphology and compositional study of the nanosheets are characterized by X-ray diffraction, field-emission scanning electron microscopy, energy dispersive X-ray analysis and Raman spectroscopy. The synthesized NiMn2O4 nanosheets are interconnected with themselves to construct arrays of nanosheets which show high electrochemical activity towards glucose analytes. The non-enzymatic glucose sensing performance of the nanosheets is studied more extensively which shows sensitivity of about 5 lAlM-1 cm-2 in the linear range 5–70 lM and its response time is 17 s. It is claimed that NiMn2O4 nanosheets arrays are more superior for glucose sensing applications due to their high stability, massive surface area and enormous active edges.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction Recently, nanosheets of ternary spinel metal oxides have attracted enormous research interests due to their extraordinary electrical and optical properties, unusual electrochemical and bio-catalytic strengths, ultra-large surface area and high chemical stability [1–3]. Nanosheets are providing immense applications in many advanced fields such as energy storage and conversion devices [4, 5], biological and chemical sensors [6, 7] and field effect transistors [8, 9]. In
addition to these, ternary metal oxide is so flexible that it holds metal cations and substitution atoms between the sub-lattice sites of a crystal structure to enhance the intrinsic material properties [10, 11]. Furthermore, transition metals like Ni and Mn possess massive unfilled and unshared d-orbital electrons. So, it is expected that suitable combinations of Ni and Mn-based materials could provide enormous electrochemical activity due to the presence of its multiple redox characteristics. Taking the benefit of aforesaid, ternary Nickel Manganese Oxide (NiMn2O4) material with nanosheets morphology can be
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https://doi.org/10.1007/s10854-020-04495-0
J Mater Sci: Mater Electron
synthesized which would explore tremendous material properties due to its excellent surface-tovolume ratio and one-dimensional electrons confinement [12, 13]. Again, array of nanosheets is more stable and has high affinity to expose their electrochemical behaviours. So, array of NiMn2O4 nanosheets can be fabricated to investigate the electrochemical and bio-catalytic activ
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