Event DetailsEvent Dates: Thursday, February 27, 2014 - 12:00pmSeminar Location: JILA X317Speaker Name(s): Mykola TasinkevychSpeaker Affiliation(s): Max Planck Institute, Stuttgart Seminar Type/SubjectScientific Seminar Type: Condensed Matter SeminarEvent Details & Abstract: Synthetic micro-motors which can move cargo in a well controlled way through a liquid environment are of significant interest for applications such as renewable energy research, targeted drug delivery, biosensing, and shuttle-transport of living cells. One promising approach is to use catalytically active Janus colloidal particles as model micro-motors. This type of particles harvest “chemical” free energy from the surrounding liquid environment and then transform it into mechanical energy. Due to an asymmetric decoration of their surface with a catalyst, which promotes a specific chemical reaction in the surrounding liquid, concentration gradients of the reaction products develop along the surface of the particle. Depending on the systems, various self-propulsion mechanisms emerge, such as bubble propulsion, self-electrophoresis, or self-diffusiophoresis, which in some systems can be activated by light. In this talk only the last mechanism, i.e. self-propulsion due to self-generated electrically neutral solute gradients, shall be considered.