describes a method for producing a large area two dimensional nanoscale network on the surface of a substrate the network is formed by depositing a sub mono layer of molecule a onto the surface of the substrate followed by a different molecule b the formation of the network relies on the hetero molecular hydrogen bonding between molecules a and b to be stronger than the homo molecular hydrogen bonding by appropriate choice of molecules a and b together with the substrate it is possible to manipulate and control the structure dimensions and chemical functionality of the network the pores of the network can act as containment vessels for other molecules and be made sufficiently large to accommodate several large molecules or atomic molecular clusters or particles application_number US 2525704 A description molecular entrapment in nanoscale vessels formed by surface supramolecular assembly the method of self assembly of a nano scale network described here is a bimolecular method that requires the two molecules a and b to exhibit stronger hetero molecular hydrogen bonding compared to homo molecular hydrogen bonding and also to have a compatible molecular geometry perylene tetra carboxylic di imide ptcdi 10 illustrated in fig1 a and melamine 12 illustrated in fig1 b are two such molecules that exhibit these properties fig1 c illustrates the compatibility of the molecular geometries of melamine 12 and ptcdi 10 which results in three hydrogen bonds 14 per melamine ptcdi pair it is understood that melamine 12 and ptcdi 10 are used in the following description to exemplify the invention only and other molecular pairs that exhibit the similar properties of compatible molecular geometry and strong hetero molecular hydrogen bonding compared to homo molecular hydrogen bonding.