synthesized AgNPs via a small ceramic
heater that has a local heating area. Because the temperature
gradient in the vicinity of the heater surface is very steep in
comparison with that of a tube furnace, the evaporated vapor
can cool at a suitably rapid rate. This makes possible the synthesis
of small nanoparticles in high concentration. This method
might be suitable for a variety of applications, including
utilization as a nanoparticle generator for long-term experiments
for inhalation toxicity study and as a calibration
device for nanoparticle measurement equipment