Negatively charge coatings

Pereira-Chioccola VL, Acosta-Serrano A, de Almeida IC et al. Mudn-like molecules form a negatively charged coat that protects Trypanosoma cruzi trypomastigotes om killii by human anti-a-galactosyl antibodies. J Ceil Sci 2000 113 1299-1307. 

Electrophoresis measurements provide a qualitative indication of the assembly of polymer multilayers on colloids [49,50], The -potential as a function of polyelectrolyte layer number for negatively charged polystyrene (PS) particles coated with poly(diallyldimethylam-monium chloride) (PDADMAC) and poly(styrenesulfonate) (PSS) are displayed in Figure... 

Fig. 7.12 SEM images ofthe diatomite substrate through sequential assembly of positively-at low (A) and high (B) magnification. The di- charged PDDA and negatively-charged zeolite atomite has a disk-like shape about 1.2 pm in nanocrystals (C). The inset in (C) shows an thickness and 20-40 pm in diameterwith a nearly enlarged view of the nanoparticle-modified sur-regular array of submicrometer-sized pores face. (Reprinted from [129] with permission of (about 300-500 nm). SEM images of diatomite Wiley-VCH.) coated with three layers of zeolite ( nanocrystals...

During the formation of polycation-polyanion multilayer coatings on halloysite, we monitored the surface potential (electrokinetic zeta potential). Initially negative halloysite (—40 mV) was converted to a positive surface with polycation layer adsorption in the first step of the LbLassembly (figure 14.10). Adsorption of polyanions in the second step re-established the negative charge which was reversed... 

Since both are negatively charged, a first coating of the capsules surface with L-polylysine is needed. 

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