$n$Kirchhoff type equations with exponential nonlinearities

In this article, we study the existence of non-negative solutions of the class of non-local problem of $n$-Kirchhoff type $$\left\{ \begin{array}{lr} \quad - m(\int_{\Omega}|\nabla u|^n)\Delta_n u = f(x,u) \; \text{in}\; \Omega,\quad u =0\quad\text{on} \quad \partial \Omega, \end{array} \right.$$ where $\Omega\subset \mathbf{R}^n$ is a bounded domain with smooth boundary, $n\geq 2$ and $f$ behaves like $e^{|u|^{\frac{n}{n-1}}}$ as $|u|\to\infty$. Moreover, by minimization on the suitable subset of the Nehari manifold, we study the existence and multiplicity of solutions, when $f(x,t)$ is concave near $t=0$ and convex as $t\rightarrow \infty.$