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. 2023 Sep 7;9(9):e19929. doi: 10.1016/j.heliyon.2023.e19929

Fig. 12.

Fig. 12

ZnO nanorods coated optical fiber sensor for volatile organic compounds (VOC) biomarker detection. Reproduced with permission from Ref. [122], with the permission of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). Copyright 2022, MDPI.