TECHNOLOGY FOCUS - POLYMERS - Preferred Nanomaterial: Alternatively, the hybrid composite nanomaterial comprises a hydrotalcite like layered double hydroxide compound provided with one or more lanthanide elements inserted into the 2D layers and one or more organic compounds having at least one of the entities, or their derivatives, from among: azole, polybenzimidazole, polythiophene, fullerene, or acids (perfluorosulfonic acid, deoxyribonucleic acid, HEME B, delta 9 tetrahydrocannabinol or cannabidiol (CBD) or coumarin-3-carboxylic acid (coumarin) or fluorescein or similar dye) or salts, and pertain non exclusively to the class of enzymes or proteins, porphyrin or cannabis, or their derivatives, intercalated between them. The lanthanide elements are selected from: neodymium (Nd3+), samarium (Sm3+), europium (Eu3+), gadolinium (Gd3+), erbium (Er3+), thulium (Tm3+) and ytterbium (Yb3+). The hydrotalcite like layered double hydroxide compound is described by the empirical formula: ((M2+)n(M3+)m(OH)2(n+m))(m+)((A(x-))m/x.yH2O).M2+ and M3+=metal cations, permissible also in their oxidized or reduced form;A=a x-valent anion; andx=the charge of the anion and y is the number of interlayer water molecules.Moreover, a typical nanoscale photoelectrochemical cell (PEC) can be envisaged in the presence of an intercalated or encapsulated light harvesting species (donor/acceptor pair), such that the nanocomposite when deposited onto an Anode substrate, dissociates neighboring water through the in situ generated sum potential, with possible simultaneous, adsorption of part of the evolved hydrogen, at the 2D lamella containing oxide phases. The intercalated or encapsulated donor/acceptor pair can be any combinations from those specified above, with similar light harvesters grown directly on the layered double hydroxide 2D lamella, as in, inorganic (quantum dots or rods or tetrapods), or as metal oxides from M(I-IV) ion, inserted into the 2D lamella and oxidized with the dissolved oxygen; with intercalated entity as its sensitizers. Preferred Method: In producing the composite nanomaterial, the hydrothermal conditions provide a synthesis temperature of 80-150 degrees C. The hydrothermal conditions provide a synthesis time of 8-12 hours. Preferred Cell: The organic-inorganic solar cell is configured as a three layers co-axial electrospun organic-inorganic solar cell, where the electron transporting inorganic material comprises functionalized-metal-chalcogen-halogen or functionalized organically modified carbon based nanowires/tubes and further comprises a charge separation material provided in the bulk hetero-junction as a middle layer, which in particular comprises at least of one fullerene derivative mixed with a light absorbing and efficient exciton generating polymer, such that phenomena like efficient light absorption/exciton dissociation at intra bulk hetero-junction phase boundaries and efficient charge transport can take place in between the middle layer containing the bulk hetero-junction and the outer layer hole transporting and inner layer providing the innermost electron carrying structures of the three layers co-axial electrospun organic-inorganic solar cell, respectively. The organic-inorganic solar cell is configured as a tandem solar cell, by repeating a set of the active layers. The organic-inorganic hybrid cell is combined with electrospinning or similar spinning techniques (e.g. wet, dry, melt, extrusion, direct, and gel spinning) at micro or macro level, such that the PEC could be realized by incorporating oxygen emitting compounds into the anodic layer, for the oxygen evolution via water/aqueous electrolyte splitting, under an adequate generated potential, with possible subsequent storage of part of the evolved hydrogen gas, at the cathode (e.g. nickel based alloy), into the locally dispersed adsorbents in the co-axial chamber. Also, the organic-inorganic hybrid cell is constructed separately, at macro scale keeping the same ideology, for dissociation of adsorbed water content from the aqueous electrolytic solution, in the anode layer; such that the relevant PEC-coaxial layers could be submitted to an adequate potential difference and hence its circuit could be completed with the electrons produced from the organic-inorganic solar cell, where part of the evolved hydrogen in the cathode chamber can be stored in-situ, via locally dispersed adsorbents. Any additional power source, which can provide a net (local to oxygen emitter in the anode chamber) potential difference of greater than 1.23 V for water splitting, thus evolving oxygen from the anode chamber and hydrogen from the cathode chamber, part of which is envisaged to be stored, in situ, into nanocomposite adsorbents dispersed locally. Exploiting the set and hence the radial multi-stage co-axial chambers, thus incorporating, in situ, at micro scale or separately at a macro scale, an innovative fuel cell, with the electrodes made in line with the layered hydrotalcite like nanocomposites, to function as a catalyst for hydrogen or methanol/ethanol as fuel, and as an in situ hydrogen adsorbents, where, the excess, un-adsorbed hydrogen as produced in the method, could be consumed near their production site when coming in contact with the interfacial anode e.g. with platinum nanoparticles and/or similar anode material which can function as a hydrogen gas dissociation catalyst; with atmospheric air inflow into the core of the co-axial empty structure, assuring atmospheric oxygen dissociation at the cathode e.g. nickel based air interface, with appropriate electrolytic membrane material e.g. perfluorosulfonic acid or potassium hydroxide soaked polymer matrix, or phosphoric acid soaked polymer matrix, obtained via respective electrolytes' percolation into a water soluble co-polymer, used for coaxial section creation. The anode, cathode and hydrogen adsorbents are synthesized as hydrotalcite like materials in line and dispersed along with: hole conducting nanomaterials into the chamber; while with electron conducting inorganic or carbon based nanomaterials in the co-axial chamber; whereas in the form of their dehydrated oxides, or as catalyzed RT hydrogen adsorbents, respectively. EXAMPLE - No suitable example given.