Abstract
Nowadays, the decrease in component size has brought the field of micro-optoelectronics into a new era that goes beyond Moore's law, which predicts an exponential growth in the number of components on an electronic chip over time. Indeed, the miniaturization of components, which has allowed this densification and thus the increase of the ratio of performance to production cost of the devices, comes up against physical limits where quantum effects appear. It is therefore becoming essential to either free oneself from these limits, or to diversify through the use of alternative components. It is within this second framework, and in order to satisfy the technological demands of society, that the diversification of the functions of components and their monolithic integration on silicon platforms, used by the electronics industry, has become a major issue of this new "More than Moore" era.It is because of this necessity and in this context of diversification that functional oxides occupy today a leading position in the field of technological innovation. Indeed, due to their wide range of physical and chemical properties, they find their place in many applications making their preparation an important challenge in the development of materials.In this thesis, we have shown that we were able to control the growth of ZnO microwires by influencing the synthesis parameters of the quartz and thus the degree of mosaicity of the buffer layer. This allowed us to achieve, for the first time, heteroepitaxy and self-assembly of (110)ZnO microwires on (100)Si substrate using a (100)alpha quartz layer as a buffer layer. This unique orientation, which takes advantage of the exposure of the apolar planes of ZnO, suggests several applications including dosimetry, optical waveguiding, catalysis and energy harvesting.