design of complex colloids - uva · design of complex colloids master/internship project contact:...

Design of complex colloids Master/Internship project Contact: Dr. L. Rossi and Prof. P. Schall Since colloidal particles (10-1000 nm), just like atoms and molecules, diffuse due to thermal motion, they are often used to study atomic and molecular phenomena. To mimic very well molecular interactions, however, colloids must interact through anisotropic interactions, for instance by using colloids with a non-spherical shape. It is therefore important to work on the design of colloids with very specific shapes that can be used as building blocks for the preparation of novel materials with predefined properties. In this project the student will work on the synthesis of colloidal particles (building blocks) with different degrees of complexity. Several subprojects are available with focus on different preparation techniques: a. In this subproject the student will try to develop a synthesis procedure for the development of polymer-silica and/or polymer-polymer composite colloids. The aim of the project is to obtain particles with a single “bump” with tunable surface properties. b. In this subproject the student will work on a synthesis procedure for the development of particles with one or more “bumps” combining emulsion droplets and colloids with different shapes prepared by inorganic synthesis and lithography that will be performed in the nearby institute AMOLF. c. In this subproject the student is expected to work on the preparation of a library of differently shaped magnetic iron oxide particles. This subproject will also involve characterization of the magnetic properties of the particles as a function of shape. d. In this subproject the student will work on the synthesis of magnetic stimuli-responsive colloids. The synthesis involves the preparation of inorganic magnetic colloids embedded in a polymer shell that respond to external stimuli such as temperature and/or pH, thus allowing switching on and off the magnetic interaction. Towards the end of each project, the student will be able to test the assembly properties of the particles via targeted experiments which usually involve the use of optical and/or confocal microscopy techniques. For more information, please contact: Dr. L. Rossi or Prof. P. Schall Institute of Physics University of Amsterdam Science Park C4.243 Tel. (0)20 525 7054 Email. [email protected], [email protected] ∆T/pH

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Page 1: Design of complex colloids - UvA · Design of complex colloids Master/Internship project Contact: Dr. L. Rossi and Prof. P. Schall Since colloidal particles (10-1000 nm), just like

Inthisprojectthestudentwillworkonthesynthesisofcolloidalparticles(buildingblocks)withdifferentdegreesofcomplexity.Severalsubprojectsareavailablewithfocusondifferentpreparationtechniques:

a. Inthissubprojectthestudentwilltrytodevelopasynthesisprocedureforthedevelopmentofpolymer-silicaand/orpolymer-polymercompositecolloids.Theaimoftheprojectistoobtainparticleswithasingle“bump”withtunablesurfaceproperties.

b. Inthissubprojectthestudentwillworkonasynthesisprocedureforthe

developmentofparticleswithoneormore“bumps”combiningemulsiondropletsandcolloidswithdifferentshapespreparedbyinorganicsynthesisandlithographythatwillbeperformedinthenearbyinstituteAMOLF.

c. Inthissubprojectthestudentisexpectedtoworkonthe

preparationofalibraryofdifferentlyshapedmagneticironoxideparticles.Thissubprojectwillalsoinvolvecharacterizationofthemagneticpropertiesoftheparticlesasafunctionofshape.

d. Inthissubprojectthestudentwillworkonthesynthesisofmagneticstimuli-responsivecolloids.Thesynthesisinvolvesthepreparationofinorganicmagneticcolloidsembeddedinapolymershellthatrespondtoexternalstimulisuchastemperatureand/orpH,thusallowingswitchingonandoffthemagneticinteraction.

Towardstheendofeachproject,thestudentwillbeabletotesttheassemblypropertiesoftheparticlesviatargetedexperimentswhichusuallyinvolvetheuseofopticaland/orconfocalmicroscopytechniques.Formoreinformation,pleasecontact:Dr.L.RossiorProf.P.SchallInstituteofPhysicsUniversityofAmsterdamScienceParkC4.243Tel.(0)[email protected],[email protected]

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