000849730 001__ 849730
000849730 005__ 20240619083547.0
000849730 037__ $$aFZJ-2018-03862
000849730 041__ $$aEnglish
000849730 1001_ $$0P:(DE-Juel1)130789$$aLang, Peter R.$$b0$$eCorresponding author$$ufzj
000849730 1112_ $$a30th International Conference on Science and Technology of Complex Fluids$$cSan Luis Potosí$$d2018-06-18 - 2018-06-22$$g30 TH ICSTCF$$wMexico
000849730 245__ $$aParticle Wall Interactions and Near-Wall Dynamics of Colloidal Spheres in Crowded Environments
000849730 260__ $$c2018
000849730 3367_ $$033$$2EndNote$$aConference Paper
000849730 3367_ $$2DataCite$$aOther
000849730 3367_ $$2BibTeX$$aINPROCEEDINGS
000849730 3367_ $$2DRIVER$$aconferenceObject
000849730 3367_ $$2ORCID$$aLECTURE_SPEECH
000849730 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1544012595_14780$$xInvited
000849730 520__ $$aOver the last decade we developed instrumental equipment, based on evanescent wave light scattering, to investigate the static interaction of colloidal particles with an adjacent wall, as well as the near wall dynamics of these particles. In this presentation, I will give an introduction to the techniques, before discussing several experiments.Using Total internal Reflection Microscopy (TIRM), we investigated the depletion interaction between a colloidal probe sphere and a flat wall, induced by rod– and disc– shaped particles at rest [1,2] and under the influence of flow fields. There we could show that the strength of these depletion potentials can be tuned by the applied shear rate [2].Further we studied the near wall dynamics of a single probe sphere in a crowded environment of rods by TIRM. The standard approach extract dynamic information from TIRM data is extracting the probe particle’s diffusion coefficient normal to the wall from the mean square displacement (MSD) vs. time curves. However, in the course of our investigation we discovered that it is more reliable to determine the particle’s drift velocity from the mean displacement (MD) vs. time curves [3,4]. Using Evanescent Wave Dynamic Light Scattering (EWDLS) we studied the near-wall dynamics of spherical particles as a function of concentration, providing experimental prove for the long standing theoretical prediction that particle dynamics near walls are slowed down and are anisotropic [5]. Upon increasing particle concentration the slowing down is diminished, where the diminishment is again different in the directions parallel and normal to the interface [6].References[1] C. July, D. Kleshchanok, P. R. Lang Eur. Phys. J. E 35, 60 (2012). DOI 10.1140 epje/i2012-12060-7[2] S. De Sio and P. R. Lang, Z. Phys. Chem. 229, 1161 (2015).[3] S. Desio, PhD-Thesis Heinrich-Heine-Universitaet Duesseldorf, Germany[4] S. De Sio, Y. Liu, J.K.G. Dhont and P. R. Lang manuscript in preparation[5] P. Holmqvist, J. K. G. Dhont, P. R. Lang J. Chem. Phys. 126, 044707 (2007).[6] Y. Liu et al. Soft Matter 11, 7316 (2015).
000849730 536__ $$0G:(DE-HGF)POF3-551$$a551 - Functional Macromolecules and Complexes (POF3-551)$$cPOF3-551$$fPOF III$$x0
000849730 536__ $$0G:(EU-Grant)262348$$aESMI - European Soft Matter Infrastructure (262348)$$c262348$$fFP7-INFRASTRUCTURES-2010-1$$x1
000849730 536__ $$0G:(EU-Grant)316866$$aSOMATAI - Soft Matter at Aqueous Interfaces (316866)$$c316866$$fFP7-PEOPLE-2012-ITN$$x2
000849730 536__ $$0G:(EU-Grant)731019$$aEUSMI - European infrastructure for spectroscopy, scattering and imaging of soft matteer (731019)$$c731019$$fH2020-INFRAIA-2016-1$$x3
000849730 7001_ $$0P:(DE-Juel1)159482$$aLiu, Yi$$b1$$ufzj
000849730 7001_ $$0P:(DE-HGF)0$$aDe Sio, Silvia$$b2
000849730 7001_ $$0P:(DE-Juel1)130616$$aDhont, Jan K.G.$$b3$$ufzj
000849730 909CO $$ooai:juser.fz-juelich.de:849730$$pec_fundedresources$$pVDB$$popenaire
000849730 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130789$$aForschungszentrum Jülich$$b0$$kFZJ
000849730 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)159482$$aForschungszentrum Jülich$$b1$$kFZJ
000849730 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130616$$aForschungszentrum Jülich$$b3$$kFZJ
000849730 9131_ $$0G:(DE-HGF)POF3-551$$1G:(DE-HGF)POF3-550$$2G:(DE-HGF)POF3-500$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bKey Technologies$$lBioSoft – Fundamentals for future Technologies in the fields of Soft Matter and Life Sciences$$vFunctional Macromolecules and Complexes$$x0
000849730 9141_ $$y2018
000849730 9201_ $$0I:(DE-Juel1)ICS-3-20110106$$kICS-3$$lWeiche Materie $$x0
000849730 980__ $$aconf
000849730 980__ $$aVDB
000849730 980__ $$aI:(DE-Juel1)ICS-3-20110106
000849730 980__ $$aUNRESTRICTED