writer：Ran Niu, Thomas Palberg, Thomas Speck
keywords：long-rang interaction, colloidal molecules, self-generated flow
source：期刊
specific source：Physical Review Letters
Issue time：2017年

The emergence of structure through aggregation is a fascinating topic and of both fundamental and practical interest. Here we demonstrate that self-generated solvent flow can be used to generate long-range attractions on the colloidal scale, with subpiconewton forces extending into the millimeter range. We observe a rich dynamic behavior with the formation and fusion of small clusters resembling molecules. The dynamics of this assembly is governed by an effective conservative energy that for large separations r decays as 1=r. Breaking the flow symmetry, these clusters can be made active. 

全文链接：https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.028001