Here is the Link for Ferrofluids for basic idea. After going through this Wiki link, probably many people will come to a conclusion like when Ferrofluid boils, its carrier liquid vaporises and nano particles gets settle down. Therefore Ferrofluid looses its properties(destroyed). I come to this conclusion but not 100% sure. There may be some wild science going over because "nano" particles and its size. So I decided to ask here and get some help from some bright minds across the world.
Part of the ferrofluid could theoretically be vaporized. As ferrofluid is made from tiny magnetic particles(eg. iron powder coated with a surfactant to inhibit clumping) suspended in a fluid. The fluid can be organic solvents, water and most commonly ink. Some of these fluids can evaporate and recondense. However, as a whole ferrofluid, cannot be vaporized. You can imagine ferrofluid as a cup of mixed sand and water that wouldn't settle(suspended).