Monitoring anchoring energy in LC-based sensors

Robert G. Lindquist; Yang Zou; Jun Namkung; Dan Ke

doi:10.1117/12.893668

7 September 2011 Monitoring anchoring energy in LC-based sensors

Robert G. Lindquist, Yang Zou, Jun Namkung, Dan Ke

Proceedings Volume 8114, Liquid Crystals XV; 81140D (2011) https://doi.org/10.1117/12.893668
Event: SPIE Photonic Devices + Applications, 2011, San Diego, California, United States

Abstract

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.

Citation Download Citation

Robert G. Lindquist, Yang Zou, Jun Namkung, and Dan Ke "Monitoring anchoring energy in LC-based sensors", Proc. SPIE 8114, Liquid Crystals XV, 81140D (7 September 2011); https://doi.org/10.1117/12.893668

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