In this report, we will describe about control of structures of two- dimensional patterns of nanoparticles. When the glass substrate was dipped into and withdrawn from highly concentrated dispersion of nanoparticles, stripe- crack patterns were formed parallel to the receding direction. The patterned assembly of nanoparticles was spontaneously removed from glass substrate. From scanning electron microscopy ( SEM), it was clear that the assembly of silica particles had strap-like structure. The thickness of the assembly consisting of silica particles could be controlled by deposition speed and size of particles.