Share Email Print
cover

Proceedings Paper

Pyroelectric manipulation of liquid crystal droplets
Author(s): F. Merola; S. Grilli; S. Coppola; V. Vespini; S. De Nicola; P. Maddalena; C. Carfagna; P. Ferraro
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Very interesting effects can be observed in maneuvering nematic liquid crystal (NLC) droplets onto functionalized polar lithium niobate (LN) crystal surfaces, covered with thin films of Polydimethylsiloxane (PDMS). It has been discovered that pyroelectric effect is able to drive a reversible fragmentation process in liquid crystal drops, starting from nanoliter drops and obtaining pico/femtoliter droplets. These small droplets are patterned according to the geometry of the substrate and aligned along the electric field lines. This novel approach for manipulating different classes of liquids by exploiting the pyroelectric effect, where the strong electric fields generated allow to manipulate liquids in 2D on a substrate or even in 3D, has been recently discovered and exploited for different purposes. In particular, manipulation of liquid crystals by a thermal stimulus could be suitable for applications such as spatial modulation of the wettability (i.e. wettability patterning), or, in principle, a dynamical optical element able to switch from a diffuser (fragmentation) state to a microlens array. Moreover, the biocompatibility of some kinds of nematic or cholesteric liquid crystals makes them suitable as biomaterials for applications in biology and tissue engineering.

Paper Details

Date Published: 23 May 2013
PDF: 7 pages
Proc. SPIE 8792, Optical Methods for Inspection, Characterization, and Imaging of Biomaterials, 87920V (23 May 2013); doi: 10.1117/12.2020555
Show Author Affiliations
F. Merola, Istituto Nazionale di Ottica, CNR (Italy)
S. Grilli, Istituto Nazionale di Ottica, CNR (Italy)
S. Coppola, Istituto Nazionale di Ottica, CNR (Italy)
Univ. degli Studi di Napoli Federico II (Italy)
V. Vespini, Istituto Nazionale di Ottica, CNR (Italy)
S. De Nicola, Istituto Nazionale di Ottica, CNR (Italy)
P. Maddalena, Univ. degli Studi di Napoli Federico II (Italy)
C. Carfagna, Instituto de Ciencia y Tecnologia de Polimeros, CNR (Italy)
P. Ferraro, Istituto Nazionale di Ottica, CNR (Italy)


Published in SPIE Proceedings Vol. 8792:
Optical Methods for Inspection, Characterization, and Imaging of Biomaterials
Pietro Ferraro; Monika Ritsch-Marte; Simonetta Grilli; David Stifter, Editor(s)

© SPIE. Terms of Use
Back to Top