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SUMMARY:Special seminar by Dr. Konstantinos Konstantinou
DESCRIPTION:Save the date! OCAMM presents a special seminar by Dr. Konstantinos Konstantinou from the University of Turku\, who will talk about atomistic simulations of phase-change materials for aerospace applications. This invited seminar will take place at the Department of Chemistry and Materials Science\, Aalto University on 1 November 2024 @ 13:15 in lecture hall D311 (Ke5) at the main building of the School of Chemical Engineering in the Otaniemi campus\, Kemistintie 1\, 02150 Espoo. The seminar is open to all. Please join us in Otaniemi to find out how order/disorder transitions in a material can be used to construct nanoscale computer memories! \nTitle \nNon-volatile phase-change memory for spaceship application \nAbstract \nRadiation-hard non-volatile memories are in high demand by the space community for implementation in microcontrollers and solid-state data recorders. In phase-change memories\, binary data are represented as changes in structural phase rather than by stored electrical charge; thus\, these devices are supposed to be tolerant to ionizing radiation effects. Ion irradiation corresponds to a process that involves the production of non-equilibrium cascades in the host material\, and the atomistic modelling of such events in glasses is challenging. Here\, radiation damage in amorphous Ge2Sb2Te5 phase-change memory material is modelled by carrying out thermal-spike simulations with ab initio molecular-dynamics calculations. A stochastic boundary-conditions approach is employed to treat the thermal nature of the cascades and drive the modelled system back to equilibrium in a natural way. The dynamics of the cascade evolution shows that the time-scale of the ballistic phase of the cascade inside the glass model is very short. Investigation of the atomic geometry highlights a structural recovery from the damage imposed during ion irradiation\, since the glass manages to maintain its amorphous network. Analysis of the bonding for all the species in the glass structure reveals particular structural modifications in the local atomic environments and the connectivity of the amorphous network. Overall\, the simulations manifest the remarkable ability of Ge2Sb2Te5 phase-change memory material to be radiation-tolerant\, hence indicating its potential applications in future space and other radiation-present environments. \nAbout the speaker \nAfter completing his MSc degree in Computational Physics at the Aristotle University of Thessaloniki in Greece\, Konstantinous moved to the UK to obtain a PhD in Physics from University College London. He then joined the University of Cambridge as a research associate in Chemistry. Konstantinos came to Finland in 2020 as postdoctoral researcher in Tampere University before joining the University of Turku\, where he currently holds the prestigious Academy Fellow position. His current research interests include defects in amorphous semiconductors\, resistive switching memories\, machine-learned molecular-dynamics simulations\, charge trapping processes\, and electronic excitations\, among others.
URL:https://ocamm.fi/event/special-seminar-by-dr-konstantinos-konstantinou/
LOCATION:Aalto University\, School of Chemical Engineering\, Kemistintie 1\, Kemistintie 1\, Espoo\, 02150\, Finland
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ocamm.fi/wp-content/uploads/2024/10/konstantinos.jpg
ORGANIZER;CN="Miguel Caro":MAILTO:miguel.caro@aalto.fi
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DTSTART;TZID=Europe/Helsinki:20241127T131500
DTEND;TZID=Europe/Helsinki:20241127T140000
DTSTAMP:20260422T100910
CREATED:20241125T075043Z
LAST-MODIFIED:20241127T081310Z
UID:262-1732713300-1732716000@ocamm.fi
SUMMARY:AI in CHEM Seminar Series: Intro session with Miguel Caro
DESCRIPTION:This talk is part of the “AI and Machine Learning in Chemical Research and Industry” Seminar Series organized by the Aalto University School of Chemical Engineering. It is open to all members of the public. Registered students in course CHEM-E4190 can also obtain 1cr by attending the seminars and completing the assignments. \nDate and location\n\nWednesday 27 November 2024 @ 13:15-14:00\nA304 Ke2 lecture hall in the main building of the School of Chemical Engineering\, Kemistintie 1\, 02150 Espoo.\n\nAgenda\n\n13:00-13:15. Setup and brief info for the registered students.\n13:15-14:00. Seminar by Miguel Caro\, lecture hall A304.\n14:00-onwards. Coffee\, netwoking and mingling in the lobby adjacent to the lecture hall.\n\nSeminar info\nAchieving a new degree of realism in materials modeling with machine learning \nWe are in the middle of an AI revolution in all aspects of society. However\, machine learning had already been trending in chemistry and materials science for a few years before ChatGPT popularized the use of AI among the general public. After a brief introduction to the field of AI in chemical research\, and links to the upcoming talks in the Seminar Series\, I will give some examples\, from our own group’s research activities\, showcasing the use of atomistic machine learning to achieve a degree of realism in materials modeling that was previously out of reach. \nAbout the speaker\nMiguel Caro is Senior Scientist at the Department of Chemistry and Materials Science\, Aalto University\, as well as main organizer of the AI in CHEM Seminar Series and teacher in charge of course CHEM-E4190. For more info\, visit miguelcaro.org.
URL:https://ocamm.fi/event/ai-in-chem-seminar-series-intro-session-with-miguel-caro/
LOCATION:Aalto University\, School of Chemical Engineering\, Kemistintie 1\, Kemistintie 1\, Espoo\, 02150\, Finland
CATEGORIES:Seminar
ORGANIZER;CN="Miguel Caro":MAILTO:miguel.caro@aalto.fi
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