001007832 001__ 1007832
001007832 005__ 20230706205126.0
001007832 037__ $$aFZJ-2023-02217
001007832 041__ $$aEnglish
001007832 1001_ $$0P:(DE-Juel1)130616$$aDhont, Jan K.G.$$b0$$eCorresponding author
001007832 1112_ $$aDispersions of charged particles: A century of theoretical development$$cXalapa$$d2023-03-21 - 2023-03-22$$wMexico
001007832 245__ $$aSingle-Particle Thermophoresis and Electric-Field Induced Phases/States
001007832 260__ $$c2023
001007832 3367_ $$033$$2EndNote$$aConference Paper
001007832 3367_ $$2DataCite$$aOther
001007832 3367_ $$2BibTeX$$aINPROCEEDINGS
001007832 3367_ $$2DRIVER$$aconferenceObject
001007832 3367_ $$2ORCID$$aLECTURE_SPEECH
001007832 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1688650980_15706$$xInvited
001007832 502__ $$cUniversidad Veracruzana
001007832 520__ $$aIn the first part of this presentation, I will discuss colloidal mass transport induced by temperature gradients (commonly referred to as thermophoresis) resulting from the electric double layer of charged spherical colloids. There are three contributions to the thermophoresis of charged colloids. The temperature dependence of the internal energy of the electric double layer leads to migration from high to low temperatures. The temperature-gradient induced asymmetry of the double layer gives rise to an electrostatic force onto the surface charges of the colloid.  Finally, the asymmetry of the double layer leads to an electro osmotic flow, that acts with a friction force onto the core of the colloid. All three contributions will be discussed, and the theoretical results will be compared to experiments.   In the second part, the phases and dynamical states that are induced by external electric fields in a system of very long and thin and highly charged rod-like colloids will be discussed. The experimental phase/state diagram, for a concentration within the two-phase isotropic-nematic coexistence region, will be presented. Depending on the electric field strength and the frequency, several phase/state-transitions are induced: a transition from nematic to chiral nematic, from a nematic to a homeotropic state, and a transition to a dynamical state where nematic domains persistently melt and reform. An explanation of these phenomena is presented, both on an intuitive level and based on the Smoluchowski equation, which is an equation of motion for the probability density function for the positions and orientations of the rods.
001007832 536__ $$0G:(DE-HGF)POF4-5243$$a5243 - Information Processing in Distributed Systems (POF4-524)$$cPOF4-524$$fPOF IV$$x0
001007832 909CO $$ooai:juser.fz-juelich.de:1007832$$pVDB
001007832 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130616$$aForschungszentrum Jülich$$b0$$kFZJ
001007832 9131_ $$0G:(DE-HGF)POF4-524$$1G:(DE-HGF)POF4-520$$2G:(DE-HGF)POF4-500$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-5243$$aDE-HGF$$bKey Technologies$$lNatural, Artificial and Cognitive Information Processing$$vMolecular and Cellular Information Processing$$x0
001007832 9141_ $$y2023
001007832 920__ $$lyes
001007832 9201_ $$0I:(DE-Juel1)IBI-4-20200312$$kIBI-4$$lBiomakromolekulare Systeme und Prozesse$$x0
001007832 980__ $$aconf
001007832 980__ $$aVDB
001007832 980__ $$aI:(DE-Juel1)IBI-4-20200312
001007832 980__ $$aUNRESTRICTED