In the beginning of 20th century, the first study to focus on self-assembly nanoparticles at interfacings was done. Pickering Emulsion is an example of a phenomenon where solid particles spontaneously migrate onto fluid interfaces. These multilayers are called monolayers. Food, cosmetics and the pharmaceutical industry are all interested in using interfaces to aid the directed assembly. Reduced interfacial force is key to liquid interface-induced association. It is possible to adjust the nanoparticle sizes and chemical characteristics of the ligands at the particle surface in order to control self assembly.
Emulsions are thermodynamically unstable because of the high oil/water interaction area. It is necessary to add an emulsifier as a third substance in order for the system to be stable.
Presently, Pickering is known to have a stabilizer mechanism. This involves the adsorption on oil/water interface of solid particles and the formation of one layer or more layers.
Nanoparticles – Structure Template
A key component of nanotechnology is nanoparticles. Especially after Pickering was discovered, more research has been done on their self-assembly.
Recently, there has been more research into the use of nanoparticles in preparation of capsules. Enveloping, solvent-evaporation and emulsion polmerization are the most commonly used methods to make nanometer and microscopic capsules.
Nanoparticle interface self-assembly
Application of nano-particle (CdSe Alu) technology has led to the creation and widespread use. New nanomaterials made of nanoparticle assemblies have been a topic of great concern due to surface functionalization technology.
Interface self-assembly by Janus particles
De Gennes was the first to propose the Janus particle. However, Janus’ potential application in various areas, including drug carriers, electronic devices as well as optics and biosensing, has been intensively researched. Janus is the original two gods in Rome. Janus Nanoparticles consist of particles with different chemical surfaces and polarities. By appropriate modification, the hydrophilic-lipophilic balance of the Janus particle surface can be controlled to adjust its distribution at the oil-water interface.
Interface assembly of nanorods
Recently, the anisotropic nature of nanorods has received increased attention. Nanoparticle synthesizer technology now allows the creation of many different types of inorganic, nanometer-rods, like CdSe, CdS, Co, Au, CdSe, CdS, Co, Au, among others. The performance of nanorod composites in electromagnetic fields and optical light has been demonstrated by studies. Interfacial assembly nanorods has properties distinct from isotropic Nanoparticles because of the size of their particles, surface shape, and surface morphology.
Interface assembly of biological nanoparticles
This modification and the monodispersity for size and shape of bionanoparticle membrane proteins provides practical benefits in particle formation, diagnostics and tissue engineering. By interfacial self-assembly bio-nanoparticles, biomaterials can also be made. Recent years have seen it become an increasingly popular area.
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