ELFT HÍRADÓ

[tcsaba AT eik.bme.hu]

                   M E G H Í V Ó - I N V I T A T I O N

     Seminar series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics

                              István Lagzi
                (Department of Physics, Budapest University
                        of Technology and Economics)

                 Pattern formation in chemical systems


Chemical systems display a wide variety of pattern formation  
processes. Self-assembly of colloids into higher order structures is  
important for many field* of *science and technology. In my lecture, I  
will present a synthesis method for nanoparticles based on nucleation  
and particle growth in the wake of a moving chemical front in a gel  
matrix. The process yields well-separated regions (bands) filled with  
nearly monodisperse nanoparticles and microparticles, with the size of  
the particles varying from band to band in a predictable way. I will  
also report a new type of pattern formation (precipitation waves) that  
has anomalous transport property, specifically superdiffusive nature,  
and it can be controlled by the initial concentration of the inner  
electrolyte. Moreover, I will show several chemical systems in which  
chemical wave propagation inside a moving precipitation layer can  
emerge. This observation points out the generality and robustness of  
similar behavior in diffusion-precipitation systems.


Idöpont: 2015. október 16., 10:15
Helyszín:
BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsöház, szemináriumi szoba


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