Controlled capillary assembly of magnetic Janus particles at fluid–fluid interfaces

Adsorption of Janus particles to curved interfaces.

We investigate the adsorption of a spherical Janus particle to a spherically curved liquid-liquid interface. We show that the equilibrium contact angle is determined by the geometry of the particle, its wettability, and also the interfacial curvature. In contrast with a homogeneous particle, there is a preferred interfacial curvature (spontaneous curvature) due to the Janus particle when the pa...

Controlled assembly of Janus nanoparticles.

Janus nanoparticles were prepared by interfacial ligand exchange reactions of octanethiolate-protected gold (AuC8) nanoparticles with 3-mercapto-1,2-propanediol (MPD) at the air/water interface. AFM and TEM measurements showed that the resulting particles formed stable aggregates in water with dimensions up to a few hundred nanometers, in sharp contrast to the original AuC8 particles and bulk-e...

Self - assembly of dielectric Janus particles

Submitted for the MAR14 Meeting of The American Physical Society Self-assembly of dielectric Janus particles HUANXIN WU, ERIK LUIJTEN, Northwestern University — We consider dielectrically heterogeneous Janus particles, spherical colloids with a dielectric mismatch between their two hemispheres. When such particles are suspended in solution, this mismatch leads to different polarization charges ...

Capillary interactions between colloidal particles at curved fluid interfaces

synthesis of amido alkylnaphthols using nano-magnetic particles and surfactants

we used dbsa and nano-magnetic for the synthesis of amido alkylnaphtols.