https://doi.org/10.1007/s100510050652
Dynamic light scattering by rodlike particles: examination of the vanadium(V)-oxide system
Institut für Physik der Johannes-Gutenberg-Universität,
Staudingerweg 7, 55099 Mainz, Germany
Received:
4
May
1998
Revised:
7
September
1998
Accepted:
25
September
1998
Published online: 15 February 1999
The dynamics of a suspension of rodlike particles has been investigated
using dynamic light scattering. The 
sols investigated in
this contribution are not monodisperse by nature and age with
time. An evaluation of the first cumulant of the autocorrelation
functions as a function of scattering vector is expected to yield
the dimensions of the particles. While the data can be excellently
fitted by the theoretical expressions for freshly prepared sols,
we found that the theoretically expected interrelation of the
(three) diffusion coefficients is not reproduced, which prohibits
the unequivocal determination of the particle dimensions. Aged
sols, on the other hand, cannot be described at all within the
framework of the theory. While this partially may originate from
the temporally increasing polydispersity of the sol system,
other factors like specific growth processes may have influence
on our data.
PACS: 82.70.Dd – Colloids / 78.35.+c – Brillouin and Rayleigh scattering; other light scattering / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
