Our newest hackmanite article is out! Sami’s second article concerning gamma radiation effects on hackmanite was published in Materials Horizons (impact factor 15.717) last week, Professor Mika Lastusaari being the corresponding author.
The article shows that gamma radiation induces hackmanite’s typical pink coloration and thus the material can be used to quantify radiation doses, but also that the high-energy radiation deforms the color center so that the reflectance spectrum shows additional signals, meaning that hackmanite can be used to identify the radiation quality. And last but not least: hackmanite also remembers exposure to gamma radiation even if it has been totally bleached to its original white color. This was a very nice and unexpected finding.
The article was an international cooperation of several institutions: University of Turku, University of Lyon (France), Tampere University, Swedish Defence Research Agency FOI, University of Jyväskylä, Turku PET Centre, and Mineralogical Society of Antwerp (Belgium).
The joint project of IMC and the University of Jyväskylä received a total of € 500,000 in funding from the Technology Industries of Finland’s Centennial Foundation and the Jane and Aatos Erkko Foundation in The Future Makers funding round. The project is led by Professor Ari Väisänen while Academy Researcher Jani Moilanen and IMC’s Mika Lastusaari lead their sub-projects.
About the project: “The need for critical metals, such as rare earths, will increase in the future. These metals are needed in electric cars, lights, wind turbines and electronic devices, for example. The recycling of rare earths is low due to the lack of efficient and environmentally friendly recycling methods. The project will develop new next-generation materials based on rare earths. The metals to be processed are recovered from industrial waste and by-product streams.“
Our hackmanite research levels up with a collaboration project with European Space Agency (ESA). The agency expressed interest in the color-changing property of hackmanite for the task of bringing various detector materials into space for examination. Hackmanite passed the initial qualifiers, and now the project can start with full power, meaning that… hackmanite has a chance to go into space!
We had the pleasure of having PhD student Pauline Colinet from the University of Lyon in France visit us for a couple of days. Pauline will be having her dissertation defense about computational chemistry early next year and wanted to come here to learn how we make hackmanite and do its measurements. For her part, Pauline showed what the sophisticated batch files of computational chemistry look like and how she commands the massive calculation clusters. We have collaborated a lot with her, and hopefully the collaboration will continue in the future! Splendid couple of day with her!
This is our newest instrument, the Edinburgh Instruments FLS 1000 photoluminescence spectrometer. We are very excited for this because it has a wide detection range deep into the infrared range, ability to measure fluorescence lifetimes, quantum yield, time-resolved emission and excitation scans and many other gorgeous features. Edinburgh Instruments’ product engineer Peter Linton was instructing us for three days about how to operate the machine. We also had to give it a traditional Scottish name: it became Skye (thanks to Peter for the name suggestion).
For this great instrument, we thank Prof. Kati Miettunen, Prof. Jarno Salonen, Dr. Taina Laiho, Dr. Heikki Palonen and the whole Finnish Research Infrastructure for Characterization and Aging of Surfaces and Materials for the Local Businesses and Environmental Economy (Casual Bee) team in Turku. See https://sites.utu.fi/casualbee/en/
Every year we have one or two interns from Turku Vocational Institute (Turun ammatti-instituutti). Teacher Jouni Jantunen and doctoral candidates Sami and Hannah held a skills demonstration review for our intern Zamaneh Baradari who spent her last day here at IMC. The joy of reunion was immense because Jouni was Sami’s physical chemistry and chemistry calculations teacher in the vocational institute in 2004–2007, and they hadn’t seen each other after 2007 before this day.
IMC group and our whole chemistry department has received attention from various newspapers and magazines with PhD student Sami Vuori‘s article (corresponding author Adjunct Professor Mika Lastusaari) that was recently published in Advanced Optical Materials: “Detection of X-Ray Doses with Color-Changing Hackmanites: Mechanism and Application“. In addition to showing a practical application, the article also reveals the mechanism of hackmanite’s coloration upon X-ray exposure, which has never been researched thoroughly before.
In the article, Sami imaged a dead body of an ant using a film with hackmanite powder on it. When the X-rays hit the film, the hackmanite colors from natural white to pink, and since the ant’s body attenuates X-rays, some photons are absorbed in it and won’t color the film. This is a simple method, which does not require any expensive analyzers since one can see the result directly.
The article was an international joint effort consisting of researchers from the University of Turku (PhD student Sami Vuori, Adjunct Professor Mika Lastusaari, Dr. Isabella Norrbo, Professor Petriina Paturi, Professor Timo Saarinen and University Teacher Heikki Palonen), University of São Paulo in Brazil (Dr. Lucas C. V. Rodrigues), Karlsruhe Institute of Technology (Dr. Jörg Göttlicher and Dr. Ralph Steininger) and University of Lyon (PhD student Pauline Colinet, Assistant Professor Tangui Le Bahers).
The GlowTrack project’s participants held a Zoom meeting where they shared an overview of the year 2020, which was the first one of the three-year plan. The project is proceeding according to the schedule, and the next steps will surely bring interesting results!
As a public outreach, Adj. Prof. Mika Lastusaari had a presentation about chemistry in one of Turku Teacher Training School’s IB line’s Integrated Science course visitor lectures. Hannah and Sami also got to tell why they have come to study chemistry and what inspires them, and also demonstrated color change and afterglow with the compulsory praise for inorganic chemistry! The “set” is shown in the photos.
Academy of Finland has selected five projects to be funded in the call to promote international collaboration under the RADDESS Academy Programme. One of the projects is the GlowTrack consortium led by our Adj. Prof. Mika Lastusaari and co-led by Assoc. Prof. Laeticia Petit and Assoc. Prof. Jonathan Massera from Tampere University. This high-impact project focuses on developing implants that are both bioactive and have red or NIR persistent luminescence.
The overall funding amount for the five projects is 12 million euros, with 2 million euros directed towards projects promoting international collaboration. 470 775 euros are allocated for GlowTrack, and the University of Turku’s share is 232 711 euros, making 49.4 % of the project’s funds. The project will be funded from January 1, 2020 through December 31, 2022.