What if a few degrees of difference decided whether an entire structure forms or nothing appears at all? Using chemical vapor deposition (a process that turns a gas into a solid coating), you place a silicon wafer coated with a nickel nitrate catalyst alongside a tiny gallium bead inside a tube furnace. The tube is sealed, pumped to vacuum, and filled with argon gas. Then the furnace ramps up at 17 degrees Celsius per minute, holds at the target temperature for twenty minutes, and cools back down. Repeat the process at six temperatures from 860 to 960 degrees Celsius. Examine each wafer under an electron microscope and discover that gallium oxide nanowires only form above 920 degrees Celsius.