2023.05.16
名大理学の若手研究者の国際交流と異分野融合促進のため、 若手研究者を講師とするレクチャーシリーズ（NU：ISE lecture） の第５回を６月１日に開催することになりました。 今回は、化学分野（Chemistry, electrochromic materials, surface science, energy storage）の内容となっています。 本件問合せ先：C. S. Wondergem（Katinka) 特任助教
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Dear members of the Graduate School of Science, We are happy to announce that the fifth speaker within the NU:ISE lecture series will be Dr. Olena Zenkina, associate professor and principal investigator at Ontario Tech University, Canada. Dr. Zenkina will present some of her work on electrochromic materials, please see the abstract below. The lecture will be held online, via Microsoft Teams on Thursday June 1st at 10:00 am JST. Please register for this lecture on Teams. -------------- What: NU:ISE lecture By who: Dr. Olena Zenkina, Ontario Tech University, CanadaFor who: Faculty & Early Career Scientists within the Graduate School of Science; D, M, B students. Members from other faculties are welcome. Scientific discipline: Chemistry, electrochromic materials, surface science, energy storageWhen: Thursday June 1st, 10:00 am JST Duration: 1 hour (~ 30-40 min presentation; ~ 20-30 min discussion) Where: Microsoft Teams this link or QR code in attached file.
Abstract
Surface Confined Terpyridine -based Monolayers for Ultra-durable Electrochromic Materials.
Electrochromic (EC) devices based on transition metal complexes that do not require noble metals benefit from lower cost and colour tunability via molecular design. Although there is great progress in the development of well-defined EC metal complexes, the design of relevant multicoloured EC films remains a challenging task limited so far by metalorganic polymers. We have demonstrated a strategy that allows the creation of efficient and robust monolayer-based EC materials on surface-enhanced conductive metal oxide screen printed supports. We have observed that making minor changes to the ligand structure can produce materials with a wide range of colour variations. Furthermore, we showed that tuning the nature and porosity of the conductive surface support could lead to materials with extraordinary coloration efficiencies and ultra-long stability.1
Here we report the deposition of different metal complexes on surface-enhanced support and probe the ability to selectively address metal ions in these complexes to reach multiple colour-to-colour transitions within one film. We were able to sequentially switch between multiple coloured states and to demonstrate effective “colour mixing” on the surface by application of various deposition strategies. In addition, we demonstrated a successful on-surface post-modification approach to tune colours of the electrochromic monolayers and to reach desirable shades of green-coloured electrochromic materials for applications as camouflage materials.2-3
Finally, we explored the energy storage potential of our hybrid electrochromic devices and explored the role of the counter electrodes on the pathways of device degradation.4
References:
1. Laschuk, N.O.; Zenkina, O.V., et al. Mater. Advances 2021, 2 (3), 953-962.
2. Laschuk, N.O.; Zenkina O.V., et al. ACS Appl. Mater. & Interfaces 2021, 13 (33), 39573-39583.
3. Laschuk, N.O.; Zenkina, O.V., et al ACS Appl. Mater. Interfaces 2020, 12 (37), 41749-41757.
4. Ahmad, R.; Zenkina, O.V., et al, ACS Energy Mater. 2022, 5 (4) 3905-3914.
Curriculum Vitae
Olena Zenkina is an expert in materials, organometallics and surface science. She studied chemical engineering at Kharkiv Polytechnic University NTU"KPI", Kharkiv, Ukraine. After graduation, she joined the group of Dr. Milko van der Boom at the Weizmann Institute of Science, Rehovot, Israel. There she was working on her Ph.D. in chemistry exploring d10 metals ring-walking over π-conjugated systems (2005-2010). Later she accepted a postdoctoral position in the group of Dr. Cathleen Crudden at Queen's University, Kingston, Canada (2010-2014). In 2014, Dr. Zenkina accepted a position at the University of Ontario Institute of Technology (now Ontario Tech. U.) in Oshawa, Canada as an Assistant Professor and was promoted to Associate Professor in 2019. In 2022 she was recognized as Ontario Tech U. Research Excellence Chair in Advanced Materials
The current research interests of Dr. Zenkina are focused on the creation of a wide range of smart materials. The design of these materials starts from the simultaneous development of enhanced supports with desired morphology, chemical, mechanical, electrical properties, etc. and organic/organometallic compounds, which upon deposition on the support impart functional properties to the resulting material. Zenkina develops mild, environmentally-friendly methodologies of self-directed solution-based deposition of well-defined organic/organometallic compounds that have led to a range of functional materials with a high degree of order and structural control at the molecular level. Significant attention is paid to exploring and utilizing synergetic properties of supports and molecular coatings that induce new enhanced features to the final materials. The resulting hybrid “smart” nanomaterials were so far applied for the development of electrochromic devices, devices for energy storage, molecular- and metal ion sensors, and protein receptors.
She served as an editor of the scientific chapter book “Nanomaterials Design for Sensing Applications” of the well-recognized series Micro and Nano Technologies, Elsevier, 2019.
See full publication list here: http://bit.ly/ovzenkina.
About NU:ISE
Last year, we started a new lecture series entitled: "Nagoya University: International Science Exchange" (NU:ISE). In this lecture series, we invite early career scientists from all over the globe to present their research, and in turn we would like to encourage one of our own early career scientists to present their work at the guest's home institute, either within the same or a different scientific discipline.
The aim of this series is to establish new connections and promote international collaboration. As such, lectures will not only include (ready-to-be) published results, but also unsolved problems or open questions that require external input to be answered. Through this format we hope to stimulate discussion and scientific exchange.