Abstract: An example of a nanotube sensor includes an array of nanotubes formed on a substrate. The nanotube sensor includes a power source connected to and configured to provide electrical power (e.g., a voltage) to the array of nanotubes. The nanotube sensor also includes an electrical sensor configured to detect at least one electrical characteristic of the array of nanotubes when the electrical power is provided to the array of nanotubes. The nanotube sensor further includes electrical circuitry including at least one processor and memory. The electrical circuitry is connected to the electrical sensors and is configured to receive the detected electrical characteristic detected by the electrical sensor. The memory of the electrical circuitry includes one or more machine learning algorithms stored therein that, when executed by the processor, allows the electrical circuitry to analyze the detected electrical characteristic to determine if one or more markers are detected.

Abstract: A set of processes for preparing metal powders, including metal alloy powders, by ambient temperature reduction of a reducible metal compound by a reactive metal or metal hydride through mechanochemical processing. The reduction process includes milling reactants to induce and complete the reduction reaction. The preferred reducing agents include magnesium and calcium hydride powders. A process of pre-milling magnesium as a reducing agent to increase the activity of the magnesium has been established as one part of the invention.