Switchable Optical Transmittance of TiO2 Submicron-Diameter Wire Suspension-Based “Smart Window” Device
Optical Materials 2015
Silver Leinberg, Vambola Kisand, Andris Šutka, Kristjan Saal, Rünno Lõhmus, Urmas Joost, Martin Timusk, Ergo Nõmmiste

In this paper, for the first time, a TiO2 submicron-diameter wire suspension-based smart window device is demonstrated in which combined planar and finger electrodes are utilised to reversibly change the orientation of the nanowires. Electrospun TiO2 anatase submicron-diameter wire suspensions in a viscous polydimethylsiloxane (PDMS) matrix were prepared directly from electrospun submicron-diameter fibre mats by using high-shear mixing, achieving the complete break-up of all electrospun mats and suspending TiO2 submicron-diameter wires uniformly in the PDMS matrix. Suspension was used as an active layer in an electro-optical device where a reversible change in light scattering is achieved by preparing a device consisting of an active layer and combined planar and finger electrode system. Using the constructed device, it was possible to change the alignment or spatial distribution of TiO2 submicron-diameter wires by applying a DC electric field across the planar or finger, electrodes thus changing the transmittance (DT = 25%) of the suspension and demonstrating the potential to use combined planar and finger electrode devices in smart window applications.


Leinberg, S., Kisand, V., Šutka, A., Saal, K., Lõhmus, R., Joost, U., Timusk, M., Nõmmiste, E. Switchable Optical Transmittance of TiO2 Submicron-Diameter Wire Suspension-Based “Smart Window” Device. Optical Materials, 2015, Vol.46, 418.-422.lpp. ISSN 0925-3467. Pieejams: doi:10.1016/j.optmat.2015.04.057

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