20.500.12556/RUL-141987 Electrochromic device demonstrator from household materials Electrochromism encompasses reversible changes of material’s optical properties (color, opacity) under the influence of an external electric current or applied voltage. The effect has been known for decades, but its importance continues to grow due to the rapid development of smart systems and the accompanying demand to build devices that consume less power. Most commercial electrochromic devices (ECDs) require sophisticated chemicals and advanced material preparation techniques. Also, the demonstration of electrochromism in chemistry classes mainly uses expensive WO$_3$ films, intrinsically conductive polymers, and/or optically transparent electrodes (OTEs). The aim of this article is to present a simple and fast educational method to build ECDs from household materials without the need for OTEs: unsharpened kitchen knives are used as electrodes, curcumin from turmeric is used as the electrochromic dye, and baking soda is used as the electrolyte. The laboratory experiments presented will help students gain a deeper understanding of the fundamentals of electrochemistry (electrolysis, pH change) and electrochromism (in our case, color changes due to pH-induced keto-enol tautomerism of curcumin). general public high school chemistry introductory chemistry demonstrations interdisciplinarity hands-on learning manipulatives electrochromism electrochromic device electrochemistry pH dyes pigments batteries color electrodes materials students elektrokromizem kemijsko izobraževanje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-10-13 14:24:58 2022-10-13 14:24:59 2022-11-09 03:54:41 0000-00-00 00:00:00 2022 0 0 Str. 3595–3600 iss. 10 Vol. 99 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.164.032.52:37.091.33 0021-9584 10.1021/acs.jchemed.2c00176 122810115 acs.jchemed.pdf acs.jchemed.pdf 1 61B21E5BF7E0EEBF9FBCEBA7D4EDD8A7 9108046ed56a76f463a8479a79ac20b724905a18022a103188b3cde7b4ccc476 1d429857-5f3a-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=163810 https://pubs.acs.org/doi/10.1021/acs.jchemed.2c00176 1 025fe4b1-4af2-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=163222 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0