Prof. dr. Alfons van Blaaderen Utrecht University When metal or semiconductor nanoparticles are brought into close enough contact, the resulting collective properties of these materials can be as different as individual silicon atoms are from their 3D semiconductor counterpart. Self-assembly is an inherently cheap and powerful way to arrive at such 3D structures, which are also referred to as colloidal crystals. By stopping the self-assembly at controlled ‘supraparticle’ sizes, one gains even more control over the properties of these structures. In this talk, we will show fundamental insights about self-assembly into a spherical confinement and how these insights extend to particles with more complex shapes such as cubes, plates, rods and binary mixtures of nano-particles. We will show that this way of hierarchical self-assemby is useful to tailor optical properties as well. In order to arrive at quantitative real-space analysis of the supraparticles, new methodologies of particle tracking continuously have to be developed. Location: Groenenborger campus, T.105 Schedule: 16:00 - 17:00 : Colloquium 17:00 - 18:00 : Reception

REGISTREREN VERPLICHT (zie link onderaan) De alumni-avond Fysica van de Universiteit Antwerpen is voor onderzoekers en studenten van het Departement Fysica het moment bij uitstek om in contact te komen met fysici die actief zijn buiten de academische wereld. Bovendien biedt deze avond aan alle alumni van de richting de kans om oude bekenden terug te zien en de nieuwe garde fysici te leren kennen. 18u30: Welkomstdrink 19u30: Presentaties van alumni - Maarten Baeten: Validator bij Argenta - Jan Buytaert: Senior System Engineer bij Verhaert - Anke Van Averbeke: Leerkracht fysica in het secundair onderwijs - Senne Van Rompaey: Junior ICT Analyst bij Fluxys 20u30: Receptie De toegang is gratis, maar registreren is verplicht via de link https://www.uantwerpen.be/nl/faculteiten/faculteit-wetenschappen/departementen/fysica/nieuws-en-activiteit/activiteiten/alumniavond-fysica __________________________________ The alumni-evening of the Physics Department of the University of Antwerp is a great opportunity for researchers and students to meet physicists who are working outside academia. Furthermore, it provides all alumni with the possibility to see old friends again and to get to know the new generation of physicists. 18u30: Welcome drink 19u30: Presentations of alumni - Maarten Baeten: Validator at Argenta - Jan Buytaert: Senior System Engineer at Verhaert - Anke Van Averbeke: Physics teacher in secundary education - Senne Van Rompaey: Junior ICT Analyst at Fluxys 20u30: Reception Participation is free, but registration is mandatory on https://www.uantwerpen.be/nl/faculteiten/faculteit-wetenschappen/departementen/fysica/nieuws-en-activiteit/activiteiten/alumniavond-fysica

Prof. dr. Jean Dalibard Collège de France and Laboratoire Kastler Brossel The physics of many-body systems strongly depends on their dimensionality. For example, in a two-dimensional world, most standard phase transitions towards an ordered state of matter would not occur, because of the increased role of fluctuations. However, non-conventional "topological" transitions can still take place, as understood initially by Kosterlitz and Thouless. During the last decade, a novel environment has been developed for the study of low-dimensional physics. It consists of cold atomic gases confined in tailor-made light traps, forming thus a thin layer of material particles. In this talk, we will review some key aspects of these quantum 2D gases, such as their transition to a superfluid state. We will also address other topology-related effects in these systems, in relation with the creation of artificial gauge fields and quantum-Hall type phenomena. See http://youngminds.uantwerpen.be/upcoming for more info.

Graphene in its pristine form has transformed our understanding of 2D electron systems, leading to fundamental discoveries and the promise of important applications. In the colloquium, new and surprising phenomena that emerge when the perfect honeycomb lattice of graphene is disrupted will be presented. In particular, we will focus on the effects of single atom vacancies on graphene's electronic and magnetic properties as revealed by scanning tunneling microscopy and spectroscopy. These include the ability to charge the vacancy site into the supercritical regime where atomic collapse leads to the formation of an artificial atom and the observation of electrostatically controlled Kondo screening of the vacancy's magnetic moment.

Colloquium "The discovery of gravitational waves"

Antwerp EPS Young Minds

Antwerp EPS Young Minds's cover photo