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dingjiajian新虫 (小有名气)
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The stability of most metal sols against aggregation is largely a kinetic effect due to the large Coulombic repulsive barrier resulting from the localization of charged particles on or near the nanoparticle’s surface, making the effective charge on the nanoparticle nonzero. It has been known for some time, moreover, that the addition of ionic or neutral species to a stable sol can result in the destabilization of the colloid through one of a number of mechanisms, which may vary according to the concentration of the added material. Specifically, the mechanism for replacing a charged adsorbate with a neutral species at the surface of the colloid particle has been proposed before.2,3 (There are several other ways of stabilizing colloidal particles, such as steric stabilization. These have been the subject of numerous publications,but are not pertinent here.) 帮忙翻译下，谢谢。 |
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