  We investigate the segregation pattern formations of strongly and weakly
fluctuated Brownian particle mixtures, which are confined in spherical
containers with finite volumes. We consider systems where the container
restricts the motions of particles combining two familiar methods: spherically
symmetric linear potential and the container edge wall. In such systems, the
following two segregation patterns are observed. When the container radius is
large enough, more weakly fluctuated particles accumulate around the center of
the container than strongly fluctuated particles. On the other hand, inverted
distributions of strongly and weakly fluctuated particles are observed when the
container radius is small. We also found a similar segregation and phase
inversion if such particle mixtures construct a chain (hetero-fluctuated
polymer) and are confined in a container with no linear potential. We provide
the qualitative mechanism and the relationships for the biopolymer behaviors of
such phase inversions.
