4.4.2 References

Pyroelectrocatalytic Disinfection Using the Pyroelectric Effect of Nano- and Microcrystalline LiNbO3 and LiTaO3 Particles

“…They are widely available, nontoxic, and insoluble in water, and their polarization is highly stable, even in unidirectional poled materials at the nanometer scale. For the pyroelectric coefficient p = d P s / d T , different values ranging from −85 to −50 μC/m 2 K (LN) and −230 to −176 μC/m 2 K (LT) are reported in the literature. − Traditional applications in nonlinear optics and in surface acoustic wave technology are solely based on the bulk properties of LN and LT. , However, in the last few years their microscopic surface properties, including chemical redox activity, came into the scientific focus. As an example, the substrate-assisted self-assembly of nanostructures, taking advantage of different redox characteristics at oppositely poled crystal faces or surface domains, was intensively investigated. , Several follow up studies were conducted, focusing on understanding the geometric and electronic structure as well as adsorption properties of LN surfaces. − Also the influence of the polarization direction of a supporting ferroelectric substrate on the (photo)catalytic activity of deposited metal clusters and thin metal or TiO 2 films has been investigated. − In contrast to the influence of the (static) polarization direction on surface chemistry, only very few investigations have been carried out concerning the influence of (transient) variation of the polarization magnitude as for example induced by the pyroelectric effect.…”