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Prof.dr. Laurens Siebbeles

Laurens Siebbeles (1963) is head of the section Optoelectronic Materials in the Chemical Engineering Department at TU Delft, (3 PI's, 5 technicians, ~20 PhD students/postdocs). The section has a worldwide unique infrastructure with production of excitons/charges by laser or high-energy electron pulses, and detection by time-resolved optical, microwave or THz conductivity techniques. He pairs experimental research with theory of charge/exciton dynamics in materials with potential (opto)electronic applications. Experimental and theoretical studies are carried out in collaboration with numerous academic groups worldwide and with industry, most notably Toyota Motor Europe in Brussels, Belgium. He publishes the results in international peer reviewed journals and via (invited) oral presentations at (international) conferences, universities or research institutes. Some results have been highlighted in other scientific journals, (inter)national newspapers and other popular media/websites. The research of Siebbeles has been funded by the Netherlands Organisation for Scientific Research (NWO, FOM, STW), the European Union, the Deutsche Forschungs Gemeinschaft and Toyota Motor Europe. In 2004 he received a VICI grant from NWO; a prestigious grant of 1250 k€ for PI's who have demonstrated their ability to develop a new line of research and act as mentor for young researchers. The grant was complemented by 500 k€ from TU Delft and used to develop a femtosecond laser facility and picosecond pulsed high-energy electron accelerator. In 2016 he was awarded an NWO-TOP grant of 800 k€, offering outstanding researchers the possibility to renew their research. He uses this grant to study excitons and charge carriers at high density, including the formation of electron-hole Cooper pairs (in collaboration with Vanmaekelbergh and Stoof from Utrecht). On a regular basis Siebbeles is (co-)organizer of (inter)national conferences, serves on (inter)national recruitment committees, boards for awarding research grants, etc. He has been teaching several courses for bachelor and master students at TU Delft, including classical mechanics, quantum mechanics/chemistry, spectroscopy and condensed matter physics. Since 2016 he is director of the Graduate School (for PhD students) of the Faculty of Applied Sciences at TU Delft. Curriculum Vitae Scientific education 1991 PhD degree, University of Amsterdam Thesis studies carried out in FOM Institute for Atomic and Molecular Physics (AMOLF) in Amsterdam. Thesis title: Anisotropy in the photodissociation of H2. Thesis advisor: Prof. Dr. J. Los 1986 MSc degree Chemistry, Free University Amsterdam Topics: Photolectron spectroscopy experiments on ionization of small molecules and quantum chemical electronic structure calculations. Past and present positions 2005-present Professor and head of section Optoelectronic Materials in Dept. of Chemical Engineering (TU Delft). Topics: Experiments and theory on excitons and charges in (in)organic nanomaterials, such as quantum dots, nanowires and two-dimensional materials. 2016-present Director of the Graduate School (for PhD students) of the Faculty of Applied Sciences at TU Delft. 2011-2016 Deputy Head of the Department of Chemical Engineering (TU Delft). 2001-2005 Professor and head of section Radiation Chemistry in Reactor Institute of TU Delft. Topics: Experiments and theory on excitons and charges in organic materials and interaction of high-energy radiation (electrons, positrons, muons) with matter. 2000-2001 Associate professor of Radiation Chemistry in the Reactor Institute of TU Delft. 1994-2000 Assistant professor of Radiation Chemistry in the Reactor Institute of TU Delft. Topics: Experiments and theory on excitons and charges in organic materials and interaction of high-energy radiation (electrons, positrons, muons) with matter. 1994-1994 Postdoc in FOM Institute for Atomic and Molecular Physics (AMOLF, Amsterdam) in group of Prof. Dr. W.J. van der Zande. Topic: Quantum theory on photodissociation of molecules. 1991-1994 Postdoc in Laboratoire pour l’Utilisation du Rayonnement Electromagnétique, Université de Paris Sud (Orsay, France) in group of Prof. dr. J.A. Beswick. Topics: Experiments and quantum theory on photodissociation of molecules. Awards TOP grant (2016) form the Netherlands Organisation for Scientific Research (NWO) of 800 kEuro, offering outstanding researchers the possibility to renew their research. VICI grant (2004) in the Innovational Incentives Scheme of The Netherlands Organisation for Scientific Research (NWO); prestigious grant of 1250 kEuro for senior researchers that have demonstrated their ability to develop a new line of research and act as a mentor for young researchers. Young Chemist grant (2002, NWO); grant of 230 kEuro for excellent young chemists to initiate a new research line. Antoni van Leeuwenhoek professorship (2001); honorary early promotion to full professor awarded by TU Delft to excellent, promising young scientists. Prof.dr. Laurens D.A. Siebbeles +31 (0)15 27 81800 l.d.a.siebbeles@tudelft.nl Building 58 Van der Maasweg 9 NL-2629 HZ Delft

Service to society and public outreach

Advisory roles The members of the Ethics/Philosophy Section are involved as advisors and/or members in several policy committees at national, EU, and UN levels, such as: COGEM (‘commissie genetische modificatie’, subcommittee ethical and social aspects), a committee that advises the Dutch government about genetic modification (Sabine Roeser, 2009-2017) The FutureSocietyNL , a newly established think tank, bringing together Dutch leaders in technology development and critical reflection on these developments (Sabine Roeser, 2018-present) The working group ‘ethics and digitization’ of ECP, ‘Platform voor de informatiesamenleving’, a Dutch platform bringing together private and public stakeholders concerning the ‘information society’ (Sabine Roeser, 2018-present) The advisory board of the COVRA/OPERA (Dutch research institute for nuclear waste disposal) (Sabine Roeser, 2011-2018) The advisory group on new risks for the Dutch ministry of infrastructure and environment (IenM) (Sabine Roeser, 2011-2012) The IST Advisory Group to EU Commissioner Reding for ICT and New Media (Jeroen van den Hoven) Advisor to the Dutch Government in various roles (Jeroen van den Hoven) The Research network of the Home Office on E-Government (Jeroen van den Hoven) The European Group on Ethics (EGE) to the European Commission (Jeroen van den Hoven, permanent member) The Dutch Research Council on Responsible Innovation (Jeroen van den Hoven) The Institute for Accountability in a Digital Age (Aimee van Wynsberghe) The European Commission's High-Level Expert Group on AI (Aimee van Wynsberghe) The Netherlands AI Alliance (Aimee van Wynsberghe) The Young Academy of the Royal Netherlands Academy of Arts and Sciences (Behnam Taebi, 2016-2021) Our members are also active in the media, attempting to raise public awareness about the ethical and philosophical implications of technology. Some of their public appearances and conferences are available online. You can see a selection of these videos down below. Sabine Roeser - Emotions should play an important role in debates on risky technology - TEDxDelft Jeroen van den Hoven - Responsible Innnovation and the Built Environment Behnam Taebi - Justice And Climate Change

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TU Delft jointly wins XPRIZE Rainforest drone competition in Brazil

TU Delft jointly wins in the XPRIZE Rainforest competition in the Amazon, Brazil Imagine using rapid and autonomous robot technology for research into the green and humid lungs of our planet; our global rainforests. Drones that autonomously deploy eDNA samplers and canopy rafts uncover the rich biodiversity of these complex ecosystems while revealing the effects of human activity on nature and climate change. On November 15, 2024, after five years of intensive research and competition, the ETHBiodivX team, which included TU Delft Aerospace researchers Salua Hamaza and Georg Strunck, achieved an outstanding milestone: winning the XPRIZE Rainforest Bonus Prize for outstanding effort in co-developing inclusive technology for nature conservation. The goal: create automated technology and methods to gain near real-time insights about biodiversity – providing necessary data that can inform conservation action and policy, support sustainable bioeconomies, and empower Indigenous Peoples and local communities who are the primary protectors and knowledge holders of the planet’s tropical rainforests. The ETHBiodivX team, made of experts in Robotics, eDNA, and Data Insights, is tackling the massive challenge of automating and streamlining the way we monitor ecosystems. Leading the Robotics division, a collaboration between TU Delft’s Prof. Salua Hamaza, ETH Zurich’s Prof. Stefano Mintchev and Aarhus University’s Profs. Claus Melvad and Toke Thomas Høye, is developing cutting-edge robotic solutions to gather ecology and biology data autonomously. “We faced the immense challenge of deploying robots in the wild -- and not just any outdoor environment but one of the most demanding and uncharted: the wet rainforests. This required extraordinary efforts to ensure robustness and reliability, pushing the boundaries of what the hardware could achieve for autonomous data collection of images, sounds, and eDNA, in the Amazon” says prof. Hamaza. “Ultimately, this technology will be available to Indigenous communities as a tool to better understand the forest's ongoing changes in biodiversity, which provide essential resources as food and shelter to the locals.” . . . .

Students Amos Yusuf, Mick Dam & Bas Brouwer winners of Mekel Prize 2024

Master students Amos Yusuf, from the ME faculty (Mick Dam, from the EEMCS faculty and graduate Bas Brouwer have won the Mekel Prize 2024 for the best extra scientific activity at TU Delft: the development of an initiative that brings master students into the classroom teaching sciences to the younger generations. The prize was ceremonially awarded by prof Tim van den Hagen on 13 November after the Van Hasselt Lecture at the Prinsenhof, Delft. They received a statue of Professor Jan Mekel and 1.500,- to spend on their project. Insights into climate change are being openly doubted. Funding for important educational efforts and research are being withdrawn. Short clips – so called “reels” – on Youtube and TikTok threaten to simplify complex political and social problems. AI fakes befuddle what is true and what is not. The voices of science that contribute to those discussion with modesty, careful argument and scepticism, are drowned in noise. This poses a threat for universities like TU Delft, who strive to increase student numbers, who benefit from diverse student populations and aim to pass on their knowledge and scientific virtues to the next generation. It is, therefore, alarming that student enrolments to Bachelor and Master Programs at TU Delft have declined in the past year. Students in front of the class The project is aimed to make the sciences more appealing to the next generation. They have identified the problem that students tend miss out on the opportunity of entering a higher education trajectory in the Beta sciences – because they have a wrong picture of such education. In their mind, they depict it as boring and dry. In his pilot lecture at the Stanislas VMBO in Delft, Amos Yusuf has successfully challenged this image. He shared his enthusiasm for the field of robotics and presented himself as a positive role model to the pupils. And in return the excitement of the high school students is palpable in the videos and pictures from the day. The spark of science fills their eyes. Bas Brouwer Mick Dam are the founders of NUVO – the platform that facilitates the engagement of Master Students in high school education in Delft Their efforts offer TU Delft Master Students a valuable learning moment: By sharing insights from their fields with pupils at high school in an educational setting, our students can find identify their own misunderstandings of their subject, learn to speak in front of non-scientific audiences and peak into education as a work field they themselves might not have considered. An extraordinary commitment According to the Mekel jury, the project scored well on all the criteria (risk mitigation, inclusiveness, transparency and societal relevance). However, it was the extraordinary commitment of Amos who was fully immersed during his Master Project and the efforts of Brouwer and Dam that brought together teaching and research which is integral to academic culture that made the project stand out. About the Mekel Prize The Mekel Prize will be awarded to the most socially responsible research project or extra-scientific activity (e.g. founding of an NGO or organization, an initiative or realization of an event or other impactful project) by an employee or group of employees of TU Delft – projects that showcase in an outstanding fashion that they have been committed from the beginning to relevant moral and societal values and have been aware of and tried to mitigate as much as possible in innovative ways the risks involved in their research. The award recognizes such efforts and wants to encourage the responsible development of science and technology at TU Delft in the future. For furthermore information About the project: https://www.de-nuvo.nl/video-robotica-pilot/ About the Mekel Prize: https://www.tudelft.nl/en/tpm/our-faculty/departments/values-technology-and-innovation/sections/ethics-philosophy-of-technology/mekel-prize

New catheter technology promises safer and more efficient treatment of blood vessels

Each year, more than 200 million catheters are used worldwide to treat vascular diseases, including heart disease and artery stenosis. When navigating into blood vessels, friction between the catheter and the vessel wall can cause major complications. With a new innovative catheter technology, Mostafa Atalla and colleagues can change the friction from having grip to completely slippery with the flick of a switch. Their design improves the safety and efficiency of endovascular procedures. The findings have been published in IEEE. Catheter with variable friction The prototype of the new catheter features advanced friction control modules to precisely control the friction between the catheter and the vessel wall. The friction is modulated via ultrasonic vibrations, which overpressure the thin fluid layer. This innovative variable friction technology makes it possible to switch between low friction for smooth navigation through the vessel and high friction for optimal stability during the procedure. In a proof-of-concept, Atalla and his team show that the prototype significantly reduces friction, averaging 60% on rigid surfaces and 11% on soft surfaces. Experiments on animal aortic tissue confirm the promising results of this technology and its potential for medical applications. Fully assembled catheters The researchers tested the prototype during friction experiments on different tissue types. They are also investigating how the technology can be applied to other procedures, such as bowel interventions. More information Publicatie DOI : 10.1109/TMRB.2024.3464672 Toward Variable-Friction Catheters Using Ultrasonic Lubrication | IEEE Journals & Magazine | IEEE Xplore Mostafa Atalla: m.a.a.atalla@tudelft.nl Aimee Sakes: a.sakes@tudelft.nl Michaël Wiertlewski: m.wiertlewski@tudelft.nl Would you like to know more and/or attend a demonstration of the prototype please contact me: Fien Bosman, press officer Health TU Delft: f.j.bosman@tudelft.nl/ 0624953733