Online Size Characterization of Nanofibers and Nanotubes

摘要: Nanofibers are already commonly found in industry and nanotubes quickly growing importance applications. As the production use of these materials expands, need to accurately size their lengths diameters aerosol phase is becoming increasingly important. This can arise from a desire obtain instant feedback for process control monitoring, or understand monitor effect on human health. For example, nanofibers such as asbestos present severe health risks when airborne toxicity fibers may be directly related nanofiber dimensions [1]. concern has been motivation developing online methods sizing aerosols [2]. Although other risks, also have excellent commercial properties. Asbestos possesses properties chemical resistance thermal insulation characteristics, which make it useful applications high-temperature insulating Carbon used material reinforcement due high tensile strength [3]. In addition nanofibers, carbon possess many unique making them desirable wide variety including nanotransistors field emission sources [4]. The and, particular, strongly size-dependent. Thus, optimizing particular desirable. this chapter, classification refers separation particles by so that resulting contains given size, whereas characterization determination distribution aerosol. Size performed transmission electron microscopy (TEM). TEM analysis proven invaluable examining structure composition individual valuable if immediate not needed. Inasmuch must first collected then analyzed, slow laborious.