Nanoparticle light scattering techniques

Fig. 4 PIC dye nanoparticles prepared by the ion-association method. (1) Particle size distributions (determined by the dynamic light scattering technique) and the corresponding electron micrographs of the dye nanoparticles. The average diameter can be controlled by tuning the molar ratio of TPB- to PIC+ (=[TPB-]/[PIC+]. With an increase in the molar ratio, the average diameter decreased. (2) Absorption spectra of PIC nanoparticles in aqueous solution with different sizes (125 and 64 nm in diameter), exhibiting size-dependent peak shift of the 0-0 band. The spectrum of the aqueous PIC-Br monomer solution is also shown...

Brar SK, Verma M (2011) Measurement of nanoparticles by light-scattering techniques. TRAC-Trends Anal Chem 30 4—17... 

Y. Zhou, S. She, L. Zhang, and Q. Lu, Determination of proteins at nanogram levels using the resonance light scattering technique with a novel PVAK nanoparticle, Microchimica Acta, vol. 149, no. 1-2, pp. 151-156, 2005. 

Figured displays simulated form factors for a multiarm star polymer of varying functionality and a hard sphere [41], The high-g asymptotic behavior, characteristic of the coil structure, is absent in the latter case. A handicap in the experimental determination of P(g) is often the narrow-g range accessible by the scattering techniques that can be overcome through the combination of low-g light scattering and high-g X-ray and/or neutron scattering (utilized on the same system). Size and shape also determine the translational diffusion Dq of the nanoparticles in dilute solution, and hence Dq can prove the consistency of the scattering results.

Various techniques can be used for the characterization of surface-modified nanoparticles (Muller, 1991). In the case of PEG-covered nanospheres, atomic force microscopy and freeze-fracture have been used to determine their morphology, light scattering has been employed to measure their size, and surface analysis techniques have been applied to detect the presence of PEG on the surface and the stability of this coating, etc. Some of these techniques are presented in this section. 

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