Now, by employing a combination of ALD and electrochemical approaches, researchers in Germany have been able to deposit ZnS nanotubes with tunable wall thicknesses onto the pore walls of porous alumina templates at temperatures as low as 75 °C. The fabricated tubes have diameters in the range 20–200 nm, wall thicknesses down to just a few nanometers and their length can be in excess of 100 µm. In addition to paving the way for a variety of applications, the precise control over the size of the structures can be exploited for the investigation of generic size-dependent phenomena in solid-state systems. ZnS, like ZnO, may also hold promise for magnetic doping. Progress in this area could help developers gain a better understanding of low-dimensional magnetic semiconductors.

The researchers presented their work in Nanotechnology.