Janus particles
Type of nanoparticle or microparticle / From Wikipedia, the free encyclopedia
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Janus particles are special types of nanoparticles or microparticles whose surfaces have two or more distinct physical properties.[1][2] This unique surface of Janus particles allows two different types of chemistry to occur on the same particle. The simplest case of a Janus particle is achieved by dividing the particle into two distinct parts, each of them either made of a different material, or bearing different functional groups.[3] For example, a Janus particle may have one half of its surface composed of hydrophilic groups and the other half hydrophobic groups,[4] the particles might have two surfaces of different color,[5] fluorescence, or magnetic properties.[6] This gives these particles unique properties related to their asymmetric structure and/or functionalization.[7]