We have applied Terahertz Spectroscopy (THz) for monitoring the size and stability of concentrated nanoparticle suspensions, and  have demonstrated that not only is it possible to identify the particle size of  a slurry using THz time-domain spectroscopy but also that real-time monitoring of the THz signal attenuation as a simple route for  monitoring size transformations within concentrated nanoparticle slurries.  The capacity of THz spectroscopy to monitor particle size in dense flows from  sub-millimeter to just 20nm in diameter, sets the technique apart from comparable methods.  The potential value of also being able to extract compositional, particle orientation and structural data makes the application of THz  in particle metrology highly promising.  That said, there is a need to further develop the fundamental interpretation of the THz spectra in order to fully capitalize on the technology for industrial applications.  To our knowledge this is the first demonstration of THz for such characterization.

New approach for monitoring concentrated particle systems with terahertz spectroscopy

244th National Meeting (2012)

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