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. 2017 Sep 5;7:10526. doi: 10.1038/s41598-017-09463-z

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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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Proposed model for the observed nanostructures formation. Row a: nanopatterns development process ongoing using a low AS/(SS + TM) ratio. Thick SS crystals incorporating a relatively high amount of TM are formed (a-1); as the SS sublimates away, the TM macromolecules precipitate onto the substrate, starting from the crystallites edges (a-2); at the end of the process, nanofibres are formed where the initial crystallites edges were before sublimating away (a-3). Row b: nanopatterns development process ongoing using a high AS/(SS + TM) ratio. Thin SS crystals incorporating a small amount of TM are formed (b-1); as in these conditions the SS disappears via sublimation very quickly, the TM macromolecules do not have time enough to diffuse to the crystallites borders to self-arrange into long fibres, and start to precipitate onto the substrate as globules (b-2); at the end of the process, nanodots are formed along the initial crystallites edges (b-3). The positioning of the two rows with respect to the time axis reflects the time allowed for the TM to diffuse within the SS upon the different thicknesses of the solid SS:TM layers. See text for more details.