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. 2017 Sep 15;7:11718. doi: 10.1038/s41598-017-11996-2

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Model system: graded Ag-In-Se/ZnSe core/shell nanocrystals. (a) Schematic illustration of the ZnSe shell growth process. Two investigated samples with distinct ZnSe atomic profiles are prepared at different shell growth temperatures. QY denoted luminescence quantum yield. (b,c) Energy dispersive X-ray spectra quantifications, (d,e) representative TEM images, (f,h) high-resolution TEM images, and (g,i) size distributions of investigated Ag-In-Se/ZnSe core/shell nanocrystals. Data for thin ZnSe shell sample are shown in the left panel and for thick ZnSe shell sample in the right panel.