Aggregation of nanoparticles

Nanotubes of MoS2, WS2 and a few other layered materials are single-crystalline in the sense that the layers run through the entire structure. Some of the chalcogenide nanotubes are, however, polycrystalline, the nanotubular form being produced by an aggregation of nanoparticles, just as in some of the metal oxide nanotubes. 

In this work, a route to build an aggregate of nanoparticles through two surfactants as mortar is developed in organic solvent. The results reveal that the strategy of self-assembly is an efficient way to create a new nano-structured system. The average size of assembled sphere is about 210 10 nm. The sample has a bulk-like sofemagnetic Fe behavior. 

Genersdly require further functionalization steps agglomeration and aggregation of nanoparticles are difficult to control... 

A time evolution study of Au films by AFM shows that Just after 10 min of the reaction, a film made up of nanocrystals of size 5-7 nm is formed. Although the size of the nanoparticles remains nearly the same even after 180 min of the reaction, we have found some evidence for the aggregation of nanoparticles in the films. The organic capped nanocrys-... 

Ciuprina et al. 2010) influence surface properties and, consequently, interactions with the polymer matrix. In fact, formation of surface charges can help reduce aggregation of nanoparticles. Still the extent of such changes is unlikely to influence reaction monitoring. 

W.-N. Wang, I. W. Lenggoro, K. Okuyama Dispersion and aggregation of nanoparticles derived from colloidal droplets under low-pressure conditions, J. Colloid Interface Sci. 288 (2), 423-431 (2005c). 

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