Development of Photon Cross-correlation Spectroscopy for the Characterization of Nanoparticles in Concentrated Suspension
H. Yang, G. Zheng, R.J. Zhang, S.G. Dai and P.A. Mu
In this article we present an overview of the developments in photon cross-correlation spectroscopy (PCCS) technique and its recent progresses. The cross correlation method with emphasis on the two-colour, three-dimensional (3-D) and one-beam technique are reviewed. Some new methods and improvements in the set-up of the PCCS substantially extend the range of concentration for measurement of particle size. The high resolution charge coupled device (CCD) is introduced to detect the speckle intensity fluctuation for time resolved correlation analysis.
Keywords: Photon correlation spectroscopy (PCS), dynamic light scattering (DLS), cross-correlation, characterization of nanoparticles, concentrated particle suspension