The growth of the Internet of Things (IoT) has increased the demand for low-cost nanostructured materials. Zinc tin oxide (ZTO) has been widely used as an alternative to current semiconductor technologies, but its production methods remain expensive. Combustion synthesis is a green, low-cost alternative that may allow us to reduce the complexity of ZTO production. In this work, zinc and tin-based nanostructures were produced through combustion synthesis using water and ethanol as solvents and different precursor solutions ratios (1:2, 1:1, and 2:1). The influence of ethylenediamine (EDA) on the crystallographic phase of 2:1 samples of both solvents and Ag doping on 2:1 ethanol samples was also studied. Samples produced with a 2:1 ratio presented a predominance of ZnO, while the 1:1 and 2:1 samples presented a mixture of ZnO, SnO2, and ZnSnO3. The use of EDA in the 2:1 ethanol and water samples led to the growth of ZnO after annealing at 600 °C. For the ZTO-Ag samples, X-ray diffraction (XRD) and Raman analysis also revealed the presence of ZnO after annealing at 600 °C. This work showed it is possible to produce ZTO nanostructures through solution combustion synthesis.

The goal of miniaturization in microelectronics catalyzes the evolution of field‐effect transistors (FETs), transitioning from classical scaling approaches to innovative architectures like gate‐all‐around FETs. Among these advancements, nanowire field‐effect transistors (NW‐FETs) emerge as a promising solution to the limitations of traditional FET designs, offering improved electrostatic control, reduction of short‐channel effects, and better overall device performance metrics. Metal oxide nanowires (NWs) provide high mobility, excellent optical transparency, mechanical flexibility, and compatibility with thin‐film technology, making them ideal candidates to be the pillar of a new wave of transparent and flexible electronics with unprecedented integration levels. This review highlights the different configurations of NW‐FETs, exploring their fabrication techniques and different advantages, as well as state‐of‐the‐art progress in metal oxide NW‐FETs, such as zinc oxide (ZnO), indium oxide (In 2 O 3 ), tin oxide (SnO 2 ), and multicomponent materials. To further improve NW‐FET performance, recent developments in doping, surface passivation methods, and post‐fabrication treatments are examined, as well as emerging fabrication methodologies. By addressing material limitations and integrating innovative design strategies, metal oxide NW‐FETs are set to play a pivotal role in sustaining Moore's Law and shaping the future of nanoelectronics.

Metal oxide nanostructures have recently gained high attention due to advances in their synthesis, particularly hydrothermal techniques, which allow precise control over their morphology, composition, and crystallinity, as well as integration into devices. Zinc-tin oxide (ZTO) nanostructures, in particular, are notable for their sustainability and multifunctional applications, including catalysis, electronics, sensors, and energy harvesting. Their ternary oxide nature supports a broad range of functionalities. The use of seed layers during synthesis has proven to be beneficial, particularly for binary systems such as ZnO, as it not only impacts the growth of nanostructures but is also advantageous for applications requiring nanostructures supported on substrates, such as in photocatalysis and sensor technologies. This work investigates the effect of various seed layers (e.g., Cu, stainless steel, Cr, Ni) on the hydrothermal synthesis of ZTO nanostructures. Compared to seed layer free methods under similar conditions, the presence of seed layers significantly influenced the resulting structures. The study produced diverse morphologies, including ZnSnO₃ nanowires and Zn₂SnO₄ nanoparticles, octahedrons, and nanowires. Findings suggest a relationship between the seed layer's phase and the resulting nanostructure phase. Furthermore, shorter synthesis durations favored discrete nanostructures, while longer durations facilitated the formation of thin films with nanostructured surfaces. These observations underscore the dual role of seed layers in influencing both the structural phase and growth kinetics of ZTO nanostructures.