pensions illustrate the validity of this single-shot method for Magnetic fields induce order and hence optical birefringence in submicrometer-sized latex particles. suspensions of anisotropic, anisodiametric, and diamagnetic particles. Many colloids and latexes are sufficiently diamagnetic to 2. THEORY exhibit this effect for relatively weak magnetic fields. An experimental and analytical procedure is used to interpret the responses The steady-state-induced birefringence of a suspension of of polydisperse polytetrafluorethylene latex suspensions to singledilute-ridged, axially symmetrical particles under the influshot, low intensity magnetic pulses to give average size and size ence of a continuous magnetic field of intensity B is given distribution data. The experimental results were compared with in SI units by (6, 7) data from electron microscopy and showed good agreement. A rapid method of obtaining size distribution data from single measurements is thereby indicated. α§ 1998 Academic Press Dn Γ
Dn s F(b, g) Γ
(c Β£ rDg/2n1 0 )rF(b, g), [1]