Abstract
We have fabricated novel doubly coated particles, with a conducting inner layer and an insulating outer layer, for use in electrorheological fluids. Orders of magnitude enhancement in the yield stress is obtained by using such particles, when compared to that of bare particles or singly coated particles (with the insulating layer only). The measured static yield stress agrees well with first-principles calculations, and supports a physical picture using electrostatic energy arguments for an intuitive understanding of this large enhancement.
- Received 10 October 1996
DOI:https://doi.org/10.1103/PhysRevLett.78.2987
©1997 American Physical Society
