Multicomponent Inorganic Janus Particles with Controlled Compositions, Morphologies, and Dimensions

Abstract

We report a new protocol for the preparation of shape-controlled multicomponent particles comprising metallic (Au and Ti), magnetic (Ni), and oxide (SiO2, TiO2) layers. Our method allows for a precise control over the composition, shape, and size and permits fabrication of nonsymmetrical particles, whose opposite sides can be orthogonally functionalized using well-established organosilanes and thiol chemistries. Because of their unique geometries and surface chemistries, these colloids represent ideal materials with which to study nonsymmetrical self-assembly at the meso- and microscales.

A temperature-controlled method to produce Janus nanoparticles using high internal interface systems: Experimental and theoretical approaches

“…Their direct interactions and heterogeneous surface chemistries give rise to unique assemblies and enhanced interfacial activities which can be exploited as the desirable properties of emulsifiers and catalysts [2][3][4]. In this field, Janus nano-and microparticles are considered as very expandable and practical subjects in both theoretical and practical fields [5][6][7]. They can be used in many applications such as nanosensors and nanoprobes [8][9][10], targeted drug delivery [11], as emulsifiers [12][13], etc.…”

Platelet Janus Particles with Hairy Polymer Shells for Multifunctional Materials

“…The method is based on the fabrication of an emulsion consisting of water and oil solutions of hydrophilic and hydrophobic monomers, which is stabilized by initiator-modified kaolinite particles. The advantage of this approach is its simplicity and the possibility of the synthesis of large amounts of Janus particles at once that is the main limitation of photolithography, which was also used for fabrication of platelet-like Janus particles. , The proposed approach can be applied to various surfaces with disc-like or platelet geometry and, hence, can aid in the design of advanced functional materials for different technological applications such as stabilization of emulsions, and the design of anti-icing or antifouling coatings.…”

Recent advances in anisotropic magnetic colloids: realization, assembly and applications

“…Once released from the mold, this magnetic structure was able to propel in water under a rotating magnetic field. 47 The use of lithographic techniques to produce complex magnetic particles is currently a matter of intense research [59][60][61][62][63][64][65] due to the unprecedented flexibility to design apriori any complex structure. Recently, Sakar et al 66 simplified the microfabrication process realizing in a single step ferromagnetic U-shaped microparticles, used to engage and transport a biological cargo.…”