正是因其极小的体积，它们才能够在溶液中保持悬浮状态。
Because of their extremely small size they can remain suspended in a solution.
悬浮在溶液里的微粒会产生含有50% - 90%氧气的泡沫。
Suspended in solution, the microparticles formed a foam containing 50 to 90 percent oxygen.
产物用去离子水洗涤，磁体分离后分散在7ml0.12M四乙基氢氧化铵水溶液中，从而得到稳定均匀的Fe3O4悬浮液。
The product was washed with deionized water using a magnet and dispersed in 7 ml 0.12 M TEAOH.
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