  We use here a particle system to prove a convergence result as well as a
deviation inequality for solutions of granular media equation when the
confinement potential and the interaction potential are no more uniformly
convex. Proof is straightforward, simplifying deeply proofs of
Carrillo-McCann-Villani \cite{CMV,CMV2} and completing results of Malrieu
\cite{malrieu03} in the uniformly convex case. It relies on an uniform
propagation of chaos property and a direct control in Wasserstein distance of
solutions starting with different initial measures. The deviation inequality is
obtained via a $T\_1$ transportation cost inequality replacing the logarithmic
Sobolev inequality which is no more clearly dimension free.
