COAGULATION OF COLLOIDAL GOLD
COAGULATION OF COLLOIDAL GOLD
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DOI：
10.1021/ja00904a001
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发表时间：
1963-01-01
影响因子：
15
通讯作者：
TURKEVICH, J
中科院分区：
文献类型：
--
作者：
ENUSTUN, BV;TURKEVICH, J
用电镜研究了柠檬酸离子稳定的200 a胶体金与NaC104的混凝动力学。结果与Derjaguin-Verwey-Overbeek理论进行了比较，只有在低电解质浓度的凝血早期才得到一致的结果。另外观察到的差异是由于引入的电解质对正离子和阴离子的吸附而导致稳定电位的变化。Hamaker常数A的计算值为2,3 X 10“u”。在双电层行为的基础上，还解释了在不同条件下形成的聚集体的形态。
Kinetics of coagulation with NaC104 of 200 A. colloidal gold which was stabilized by citrate ions was investi-gated by electron microscopy. The results were compared with the Derjaguin-Verwey-Overbeek theory and an agreement was obtained only in thevery early stage of coagulation at low electrolyte concentration. The discrepancies observed otherwise were explained on the basis of variation of the stabilizing potential due to adsorption of cation and anion of the electrolyte introduced. The Hamaker constant A was calculated as 2, 3 X 10" u erg. The morphology of the aggregates formed under various conditions was also explained on the basis of the behavior of the electrical double layer.