Nanotechnology is advancing through the creation of solid-state nanotubes from thin films of various materials. These nanotubes can be formed by releasing thin layers from a substrate through selective etching, allowing precise control over their position and structure. Two methods are used: a general method involving a sacrificial layer and a specialized method using a bilayer of different materials. The nanotubes can be made from a wide range of materials, including semiconductors, and can be tailored for specific applications. A typical silicon-germanium nanotube created using the general method is 12 micrometers long and 230 nanometers in diameter, with a single-wall thickness of 16 nanometers. Smaller diameters can be achieved with thinner layers, demonstrating the remarkable elasticity of the material. Similarly, nanotubes of indium, gallium, and arsenic have been created using the specialized method. These nanotubes have potential applications in fluid transportation, capillarity studies, and nanoinjection. They can also serve as nanodrillers, nanotweezers, microscopy tips, or nanocontainers. Silicon-based compounds are particularly suitable for mechanical applications due to their hardness and elasticity. Solid-state nanotubes could have electronic applications, such as nanocables or transistors. Carbon nanotubes have been proposed for use in nanoelectronics, and alternative materials could offer increased flexibility in design and properties. The ability to precisely control the structure and position of these nanotubes makes them valuable for both fundamental research and practical applications.Nanotechnology is advancing through the creation of solid-state nanotubes from thin films of various materials. These nanotubes can be formed by releasing thin layers from a substrate through selective etching, allowing precise control over their position and structure. Two methods are used: a general method involving a sacrificial layer and a specialized method using a bilayer of different materials. The nanotubes can be made from a wide range of materials, including semiconductors, and can be tailored for specific applications. A typical silicon-germanium nanotube created using the general method is 12 micrometers long and 230 nanometers in diameter, with a single-wall thickness of 16 nanometers. Smaller diameters can be achieved with thinner layers, demonstrating the remarkable elasticity of the material. Similarly, nanotubes of indium, gallium, and arsenic have been created using the specialized method. These nanotubes have potential applications in fluid transportation, capillarity studies, and nanoinjection. They can also serve as nanodrillers, nanotweezers, microscopy tips, or nanocontainers. Silicon-based compounds are particularly suitable for mechanical applications due to their hardness and elasticity. Solid-state nanotubes could have electronic applications, such as nanocables or transistors. Carbon nanotubes have been proposed for use in nanoelectronics, and alternative materials could offer increased flexibility in design and properties. The ability to precisely control the structure and position of these nanotubes makes them valuable for both fundamental research and practical applications.