Nanosheets (NS) provide an innovative method for growing perovskite thin films on diverse substrates like glass and silicon, serving as germination seeds and offering a cost-effective alternative to expensive monocrystalline substrates. According to the NS transfer process onto the substrate, more than 85-90 % of the substrate is covered. However, a small fraction of the perovskite film grows directly on the substrate. This raises several questions: Is the perovskite film grown on glass conductive? How does the NS network influence electrical properties at macroscopic and submicron scales? To address these questions, we investigated the impact of thickness on the transport properties of transparent conductive SrVO3 vanadate deposited on glass coated with [Ca2Nb3O10]- nanosheets (CNO NS). Macroscopic measurements revealed significant degradation of transport properties at thicknesses below 15 nm. In-plane local electrical properties were examined using Scanning Spreading Resistance Microscopy. Our findings indicate that local transport remains nearly constant when SrVO3 is grown on NS, while a strong thickness dependence is observed when SrVO3 is directly deposited on glass. These results contribute to a better understanding of the growth process, the integration of functional oxides on NS and open new perspectives for tuning the properties of vanadate films as transparent electrodes.

In the Combinatorial Substrate Epitaxy (CSE) approach, a thin film is grown at high temperature on a polycrystalline substrate. Those substrates induce a local film epitaxy on each substrate grain and an overall polycrystalline character on the macroscopic scale. Compared to single-crystalline films, this approach provides the possibility to introduce, in a controlled way, grain boundaries providing new functionalities. Therefore, controlling the microstructure and grain size of the substrates is an important step for tuning the film properties. In this paper, a complete study of the granular growth of the standard substrate material for the deposition of perovskite thin films, SrTiO3, has been carried out with different isothermal cycles highlighting the grain growth mechanisms. From these results, we are able to predict the sintering thermal cycle necessary for targeting very precisely a desired grain size and the corresponding physical properties. Indeed, highly restraint physical properties specifications are needed for advanced electronic applications. Since a classic granular growth model was used, this approach can be generalized to the broad family of oxides.

La0.67Sr0.33MnO3 (LSMO) thin films have been grown by pulsed laser deposition on SrTiO3 using combinatorial substrate epitaxy (CSE) approach, i.e. polycrystalline substrates with micrometer-size grains. The crystallographic domains size of those polycrystalline substrates can be controlled between 2 and 45 µm depending on the annealing temperature during synthesis. Each grain of the substrate acts as a single crystalline growth template promoting local epitaxy with a reproduction of the substrate grain structure in the thin film. Therefore, a fine-tuning of the substrate grain metrics and high crystalline quality of locally epitaxial LSMO film, allows to combine the advantages of polycrystalline, i.e. the presence of low field magnetoresistance (LFMR) and the possibility to use very thin films, with a pronounced magnetic shape anisotropy. For this, the magnetic and transport properties of the films are showing a strong influence with varying grain metrics of the substrate. High Curie temperatures, important values of the LFMR and anisotropy for optimized substrate grain metrics with the relative orientation of the magnetic field to the film plane underline the high quality of the films and the advantage of the CSE approach. The obtained LSMO thin films may have an interest for high-resolution low field magnetic sensors application.

Indium‐tin‐oxide (ITO) is a widely employed transparent conducting oxide (TCO), but the indium scarcity and price encourage developing some alternatives. The correlated metals CaVO 3 and SrVO 3 have been recently identified as new TCOs with functional properties being comparable to ITO. However, their technological potential is limited by the critical requirement of a perovskite structure of the film, impossible to achieve via direct growth on substrates commonly used for applications. In this article, the authors tackle this limitation by demonstrating the crystalline growth of vanadate TCOs on glass at temperatures below 600 °C, with the help of 2D nanosheets as transparent seed layers. The functional properties do not suffer from the textured structure of the films, as confirmed by an in‐depth spectroscopic ellipsometry study, allowing for an industrially viable approach to integrate vanadate TCOs on virtually any surface and to exploit their promising performances as a new generation TCO.

SrVO3 (SVO) is a complex oxide with interesting optical and conduction properties as an indium-free transparent conducting oxide for electrode applications. In this paper, we report how the surface of SVO can be designed at the nanoscale from self-organized Sr3V2O8 nanostructures (NS) with different shapes and morphologies depending on crystalline orientations. By combining transmission electron microscopy (TEM) and atomic force microscopy (AFM), we compare the characteristics of the NS for SVO films grown on SrTiO3 (STO) polycrystalline substrates, according to combinatorial substrate epitaxy (CSE), with those of NS observed from SVO films deposited on STO single crystalline substrates with different crystallographic orientations ((1 0 0), (1 1 0), (1 1 1)). We are able not only to show that the obtained morphologies are correlated to the specific substrate orientation due to the epitaxial relationships between the NS, the SVO, and the substrate, but also to establish a NS library and determine the necessary crystalline orientations for a certain NS morphology on demand. Finally, dissolution of the NS in water leads to typical inverse imprints on the surface of the film, offering a fast and easy way to pattern the electrodes. This work presents a new way of patterning surfaces with a specific design of self-organized NS.

New paradigms are required in microelectronics when the transistor is in its downscaling limit and integration of materials presenting functional properties not available in classical silicon is one of the promising alternatives. Here, we demonstrate the possibility to grow La0.67Sr0.33MnO3 (LSMO) functional materials on amorphous substrates with properties close to films grown on single-crystalline substrates using a two-dimensional seed layer. X-ray diffraction and electron backscatter diffraction mapping demonstrate that the Ca2Nb3O10- nanosheet (NS) layer induces epitaxial stabilization of LSMO films with a strong out-of-plane (001) texture, whereas the growth of LSMO films on uncoated glass substrates exhibits a nontextured polycrystalline phase. The magnetic properties of LSMO films deposited on NS are similar to those of the LSMO grown on SrTiO3 single-crystal substrates in the same conditions (which is used as a reference in this work). Moreover, transport measurements take advantages of the texture and polycrystalline properties to induce low-field magnetoresistance at low temperature and also a high value of 40% magnetoresistance from 10 to 300 K, making it interesting for sensor applications. Therefore, the NS seed layer offers new perspectives for the integration of functional materials grown at moderate temperatures on any substrate, which will be the key for the development of oxitronics.