Start
Nov 29, 2016 - 16:00
End
Nov 29, 2016 - 17:00
Venue
Rm. No. 240 Chemical Engg. Dept.
Event Type
Speaker
Prof. Wolfgang Peukert Institute of Particle Technology University of Erlangen Germany
Title
Functional particle systems: From early stages of particle formation towards hierarchical structure design
Abstract: Our mission is to address grand challenges in particle science and technology. These are related to the formation processing and application of particulate systems along the five dimensions of size shape surface structure and composition. Today unit operations and product design are the two most important pillars of chemical engineering. The applications define the required product properties which cover both classical fields of process technology in the chemical industry as well as new emerging fields of electronics energy and environmental technologies life sciences materials science and engineering nanotechnology and photonic technologies. Unifying principles of particulate product design are proposed which are widely applicable to many different kinds of products including solid liquid and even gaseous particles. Results from the Erlangen Cluster of Excellence “Engineering of Advanced Materials” show that the joint venture of chemical engineering with materials science in concert with the basic sciences opens new prospects for all involved disciplines. Today particle technology moves forward from careful control of “only” particle size to systems with higher complexity i.e. shape surface structure and composition both on the level of single particles and particle ensembles. We highlight aspects of these trends by focusing on synthesis and characterization of quantum dots into well-defined structures of rods ellipsoids mesocrystals porous spheres and thin films all with interesting functional properties. Analytical ultracentrifugation equipped with a multiwavelength UV/Vis detector can be used to analyze particle systems with unprecedented accuracy and resolution. Examples will be given for “green” carbon nanodots and sizes below 1 nm shape analysis for graphene obtained through a scalable delamination process and analysis of size-dependent optical properties. Finally optimization techniques are presented for particle formation in liquids (quantum dot systems) and nanoparticles in the gas phase (Si nanoparticles).Bio: Prof. Peukert received his Diploma and PhD in Chemical Engineering at the University of Karlsruhe. He has worked at the R&D division of Hosokawa Micron in Osaka and subsequently been the R&D Director of Hosokawa MicroPul in Cologne as well as a Board Member of Hosokawa Micron Int. in New York. He has served as a faculty member at the Technical University of Munich and at the University of Erlangen-Nurnberg and is currently involved with the Center for Functional Particle Systems at the University of Erlangen-Nurnberg. He is the recipient of the Leibniz Prize in 2005 and the Ernest Solvay Prize in 2012. In 2008 he delivered the Leslie Ford Lecture at the UK Particle Technology Forum. His research interests include particle science and technology with applications in chemical engineering materials science nanotechnology colloid science biotechnology and environmental science.