A.E. Arbuzov Institute of Organic and Physical Chemistry, Arbuzov Street, 8, 420088 Kazan, Russia.
J Colloid Interface Sci. 2011 Feb 15;354(2):644-9. doi: 10.1016/j.jcis.2010.11.050. Epub 2010 Nov 23.
The aggregation and cloud point behavior of Tb(III)-doped silica nanoparticles has been studied in Triton X-100 (TX-100) solutions at various concentration conditions by fluorimetry, dynamic light scattering, electrophoresis and transmission electron microscopy methods. The temperature responsive behavior of nanoparticles is observed at definite concentration of TX-100, where the aggregation of TX-100 at the silica/water interface is evident from the increased size of the silica nanoparticles. The reversible dehydration of TX-100 aggregates at the silica/water interface should be assumed as the main reason of the temperature induced phase separation of silica nanoparticles. The distribution of nanoparticles between aqueous and surfactant rich phases at the phase separation conditions can be modified by the effect of additives.
通过荧光法、动态光散射法、电泳法和透射电子显微镜法研究了铽（III）掺杂二氧化硅纳米粒子在不同浓度条件下的 Triton X-100（TX-100）溶液中的聚集和浊点行为。在一定浓度的 TX-100 下观察到纳米粒子的温度响应行为，其中在二氧化硅/水界面处 TX-100 的聚集从二氧化硅纳米粒子的尺寸增加中明显看出。应假定二氧化硅/水界面处 TX-100 聚集体的可逆去水作用是导致二氧化硅纳米粒子温度诱导相分离的主要原因。在相分离条件下，纳米粒子在水相和表面活性剂富相之间的分布可以通过添加剂的影响来改变。
