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. 2017 Oct 17;12:567. doi: 10.1186/s11671-017-2335-y

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 4 — a I-V characteristics of Pd-decorated MoS₂/Si heterojunction. The inset shows the schematic illustration for the measurements. b UPS spectra of the MoS₂ layers on Si substrate. c Curve of (αhν)² vs hν of the MoS₂ layers. The energy band diagram at the MoS₂/Si interface before contact (d) and after contact (e)