  Charged pattern formation on the surfaces of self--assembled cylindrical
micelles formed from oppositely charged heterogeneous molecules such as
cationic and anionic peptide amphiphiles is investigated. The net
incompatibility $\chi$ among different components results in the formation of
segregated domains, whose growth is inhibited by electrostatics. The transition
to striped phases proceeds through an intermediate structure governed by
fluctuations, followed by states with various lamellar orientations, which
depend on cylinder radius $R_c$ and $\chi$. We analyze the specific heat,
susceptibility $S(q^*)$, domain size $\Lambda=2\pi/q^*$ and morphology as a
function of $R_c$ and $\chi$.
