About the Multidisciplinary Seminar Program
Created in 1995, the Escola Tecnica Superior d'Enginyeria Quimica (ETSEQ) at Universitat Rovira i Virgili aims at becoming an international reference in chemical engineering education and research. The ETSEQ is located in an area that is socially and economically very dynamic, and that is home to one of the most important centers of chemical industry in southern Europe.
The Multidisciplinary Seminar Program is both the seminar series for faculty and researchers in the ETSEQ, and a mandatory class for its graduate students. The Program aims at inviting leading international researchers working on areas that are of interest to faculty and researchers in the School.Learn more
Next seminar (Jan. 25, 2019)
Location: Sala de Graus, ETSEQ
Start time: 12 p.m.
Cholesteric liquid crystals (CLC) are soft photonic materials that exhibit selective light reflections due to the presence of a helical molecular organization. The reflected wavelength depends on the pitch of the helical structure which can be easily tuned by chemical composition, temperature or other external stimuli, and stabilized by chemical crosslinking, i.e. using acrylate-based monomers. Such optical properties make them appealing for battery-free optical sensors, reconfigurable optical displays, lasing, light manipulation and reflective coatings.
In this seminar, I will show the recent advances of our research group paying special attention to the development of patterned reflective coatings made of CLC particles. CLC reflective coatings have a pseudo one-dimensional organization leading to incident-angle-dependent reflection according to the Bragg’s law; in other words, the reflected wavelength depends on the viewing-angle. In addition, the alignment of the cholesteric phase is crucial to properly reflect light and requires the use of, in example, alignment layers. CLC particles, in contrast, have a three-dimensional organization of the helical structure allowing the fabrication of angle-independent reflective coatings by simple coating techniques that does not require alignment layers.
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