Electrospun Mn2O3Nanofiber Networks as Bio-Transducers: Electrical Characterization, Modeling, and DNA Sensing

Tripathy, S. and Singh, S.G. (2021) Electrospun Mn2O3Nanofiber Networks as Bio-Transducers: Electrical Characterization, Modeling, and DNA Sensing. IEEE Transactions on Electron Devices, 68 (4). pp. 1892-1898. ISSN 1557-9646

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In this work, we report the synthesis and electrical characterization of electrospun manganese III oxide (Mn2O3) nanofibers and their application in chemiresistive biosensing. Here, the Mn2O3 nanofibers, which are inherently p-type semiconductors with a direct bandgap in the order of 1.2-1.4 eV, are drop cast across interdigitated electrodes to create the desired chemiresistive networks. Their I-V characteristics are governed by space charge limited current, attributing to nonlinear behavior at higher voltages. However, in the range of ±0.5 V, near-linear behavior is observed. Here, we have used an analogous R-C network to explain the low- and high-frequency behavior of the said nanofibers under different applied-bias conditions. Furthermore, the effect of temperature on the said nanofibers' conductive properties is investigated, and the corresponding Arrhenius activation energy is derived. We have also explored the conductance-temperature dependence concerning the nanofiber network and have analyzed the potential carrier transport mechanisms. Also, operating in the near-linearity window, we have developed a chemiresistive protocol for DNA sensing. Mn2O3 nanofibers decorated with single-stranded probe DNAs act as transducers for surface hybridization with target nucleotides. The DNA sensing carried out in this work has a dynamic concentration range of 10 fM to 10 nM, with a linear response between 100 pM and 10 nM. © 2021 IEEE.

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IITH Creators:
IITH CreatorsORCiD
Singh, Shiv Govindhttp://orcid.org/0000-0001-7319-879X
Item Type: Article
Uncontrolled Keywords: Arrhenius energy, carrier transport, DNA sensor, electrical modeling, nanofiber networks
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: Mrs Haseena VKKM
Date Deposited: 24 Jan 2022 09:31
Last Modified: 22 Feb 2022 06:25
URI: http://raiith.iith.ac.in/id/eprint/9118
Publisher URL: https://ieeexplore.ieee.org/document/9363332
OA policy: https://v2.sherpa.ac.uk/id/publication/3444
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