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. 2021 May 31;12(6):642. doi: 10.3390/mi12060642

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The In₂O₃ nanolines FET sensing device. (a) Schematics of In₂O₃ nanolines FET device and several surface modifications. The information of the APTES and DNA-probe is shown at the lower left. The microscope image of device is in bottom right. (b) Representative sensing response curve of DNA probe immobilized In₂O₃ sensing device towards miR-21 target. The background solvent is diluted PBS solution (0.01 X). The concentration of miR-21 target is changed. (c) Sensing response of the sensors after various surface modifications. The concentration of miR-21 target is 500 pM/mL.