Flexible nickel Prussian blue analogue films for electrochromic and H 2 O 2 sensing
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Flexible nickel Prussian blue analogue films for electrochromic and H2O2 sensing Esin Eren1,2 · Aysegul Uygun Oksuz2 Received: 4 May 2020 / Accepted: 25 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract We showed that nickel Prussian blue analogue (NiPBA) films were electrochemically deposited onto a conducting transparent indium tin oxide coated with polyethylene terephthalate electrodes. The flexible NiPBA films were characterized by means of scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS), X-ray photoelectronspectroscopy technique and X-ray diffraction analyses. Electrochromic performance of the flexible NiPBA films was investigated using cyclic voltammetry, chronoamperometry and chronocoulometry methods. The coloration, bleaching times and reversibility of the NiPBA film were calculated as 5.8 s, 2.7 s, and 97.37% in KCl liquid electrolyte medium, respectively. Electrocatalytic behavior of the NiPBA film towards H 2O2 sensor was also evaluated by chronoamperometry technique. The flexible NiPBA film showed a linear response to H 2O2 in concentration range of 3.92 to 15.68 mM (R2 = 0.9906), sensitivity of 1.6272 µAmM−1 cm−2. After performing repeated bended cycle tests, the flexible NiPBA films showed good mechanical stability in terms of both electrochromic and H 2O2 sensing properties. The presented results can promote its potential application in wearable devices, displays, which are flexible states for monitoring.
1 Introduction Recently, electronic devices have been engaged in people’s life in a way we could never think of a decade ago. Especially, a novel technology is flexible electronic with fast development of personal electronic. It initiated with organic polymer transistors prepared on flexible plastic substrates. Then, diversified kinds of flexible electronic, optoelectronics and electrochemical devices that can be bended, folded or rolled have been developed [1]. The flexible electronic devices with desired functionalities have gained huge interest from researchers due to their lighter weight, enhanced Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10854-020-04106-y) contains supplementary material, which is available to authorized users. * Esin Eren [email protected] * Aysegul Uygun Oksuz [email protected] 1
Department of Energy Technologies, Innovative Technologies Application and Research Center, Suleyman Demirel University, 32260 Isparta, Turkey
Department of Chemistry, Faculty of Arts and Science, Suleyman Demirel University, 32260 Isparta, Turkey
2
comfort and higher space efficiency, in addition to their ability to maintain the physical integrity under bending or folding and even stretching. These advantageous features allow them to have specific applications such as flexible and wearable devices, e-papers, displays [1–4]. Prussian blue (PB) is one of the widely used compounds in diverse applications such as sensors, electrochromic devices and elect
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