A micro-mirror device includes a substrate having a surface, and a plate spaced
from and oriented substantially parallel to the surface of the substrate such that
the plate and the surface of the substrate define a cavity therebetween. A dielectrophoretic
microemulsion capable of movement when an electrical signal is applied to the micro-mirror
device is disposed in the cavity, and a reflective element is interposed between
the surface of the substrate and the plate such that the reflective element is
adapted to move between a first position and at least one second position. The
dielectrophoretic microemulsion has a continuous oil phase.