The invention relates to a process for the production of a transparent support covered with a deposit of inorganic nanoparticles, said deposit having micro gaps, comprising the following steps: application of a solution of polyelectrolyte having ionized functional groups to a transparent support, followed by at least one washing and drying step to form a charged polyelectrolyte deposit on said support; application of a solution of polymer microparticles having ionized groups with charges opposed to those of the polyelectrolyte deposit to said polyelectrolyte deposit, followed by at least one washing step for the formation of a deposit of charged polymer microparticles on the polyelectrolyte deposit; covering the deposit of charged polymer microparticles with a solution of polyelectrolyte having ionized functional groups with charges opposed to those of the charged polymer microparticles of step (b), followed by at least one washing and drying step to form a charged polyelectrolyte deposit; application of a solution of ionized inorganic nanoparticles having surface charges opposed to those of the charges of the polyelectrolyte of step (c) to the charged polyelectrolyte deposit, followed by at least one washing step to form at least one layer of ionized inorganic nanoparticles; removal of the deposit of polymer microparticles of step (b) and the deposits of polyelectrolyte of steps (a) and (c) to obtain the deposit of inorganic nanoparticles having micro gaps.