NPB is coating on the planner substrates by the technique of RESS process, the nuclear particle will become micro-spheres in a short time when solvent is sprayed from the nozzle.

• 本研究利用超临界流体快速膨胀法(RESS)将超临界二氧化碳来对NPB进行溶解并使其沉积在基板上，当溶液喷出喷嘴时会析出大量微粒并在极短时间内成核增长形成次微米微粒。