Procedure for storing and releasing protein-decorated nanoparticles on paper substrates

The invention relates to a process for storing protein-decorated nanoparticles on paper substrates without irreversible binding, and particularly for storing protein-decorated nanoparticles within paper substrates modified with a polymer. The invention also relates to a reservoir containing protein-decorated nanoparticle capable of stablishing biological interactions obtained by the process and its use in biosensors made of paper.