Liquid crystal (LC) based sensors have been investigated over the past decades in an effort to develop low cost, portable,
field-deployable, highly selective chemical and biological sensors. Due to the collective behavior and the highly
anisotropic properties of liquid crystal molecules, detection of very low levels (ppbs) of chemical and biological agents
is possible. However, present LC sensors rely on a threshold concentration of a targeted analyte to cause a surface driven
molecular reorientation of the LC molecules. In this paper, we present techniques using capacitive transduction to
monitor anchoring energy that improve sensitivity of LC based sensors.
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