ABSTRACT
One of the main tasks of current technology is the sensing. We should continuously check the value of a myriad of parameters in a large number of complex systems, ranging from the strain of the components of an aircraft (Gil-Garcia et al. 2015) to the DNA sequence variations (Hahm and Lieber 2004). Thus, sensors are a key point in current world, in particular since the introduction of the concepts of Internet-of-things (IoT) (Borges et al. 2015) and smart cities (Perera et al. 2013). For each interesting parameter, we can find several kinds of sensors, depending on the physical properties or phenomena that are used in their design. In this chapter, we focus on sensors using the electronic properties of a very interesting material: liquid crystals (LCs).
