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. 2021 Oct 27;21(21):7132. doi: 10.3390/s21217132

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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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FESEM image of the MF coated with WS₂ (a). An enlarged view of the region marked by a blue rectangle is MF coated with WS₂ at 10,000× magnification (b). EDX elemental spectrum and quantification results for tapered MF coated with WS₂ (c). Raman spectra of WS₂ coated on MF by drop-casting (d). EDX-elemental mapping on the tapered region of MF coated with WS₂ (e). Silicon, (f) tungsten (W) (g); oxygen (O) (h), and sulfur (i) distribution mapping.