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. 2020 Apr 10;10(4):718. doi: 10.3390/nano10040718

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© 2020 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 (http://creativecommons.org/licenses/by/4.0/).

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Scheme 1 — Experimental apparatus used for the silk fibroin nanoparticle (SFN) synthesis process. (1) peristaltic pump; (2) SF-[emim⁺][acetate⁻] aerosol generated with pressurized N₂; (3) Methanol at −20 °C; (4) stirring bar; (5) stirring plate.