TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The metal is selected from transition metal, group 13, group 14, group 15, lanthanides and actinides (preferably Fe, Pt, Co, Cd, Cu, Ti, V, Cr, Mn, Ni, Ag, Au, Pd, Ru, Os, Mo, Zr, Nb, La, In, Sn, Pb and Bi, especially Ag, Cu, Au, Pt, Pd, Ru, and Os). Preferred Method: The powder is obtained by separating solids from a solution of coordination polymers formed by coordinating multi-dentate ligands, monodentate ligands or multi-dentate ligands and monodentate ligands to metal and drying the solids. The heat treatment temperature is 600degreesC - melting point of a core metal contained in the coordination polymer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Ligand: The multi-dentate ligand is at least one ligand selected from trimesate-based ligands of formula (I), terephthalate-based ligands of formula (II), 4,4'-bipyridinebased ligands of formula (III), 2,6-naphthalenedicarboxylate-based ligands of formula (IV) and pyrazine-based ligand of formula (V).R1-R25=H, halo, hydroxy or t1;andt1=1-20C alkyl, 1-20C alkoxy, 2-20C alkenyl, 6-30C aryl, 6-30C aryloxy, 2-30C heteroaryl or 2-30C heteroaryloxy (all optionally substituted).    TECHNOLOGY FOCUS - POLYMERS - Preferred Reactants: The coordination polymer is a compound of formula MxLyS'z. The coordination polymer forms a network structure by linking metals using the multi-dentate ligand.M=transition metal, group 13, group 14, group 15, lanthanide or actinide;L=multi-dentate ligand simultaneously forming an ionic bond or a covalent bond with at least two metal ions;S'=monodentate ligand forming an ionic bond or a covalent bond with one metal ion;x,y=greater than or equal to1;andy+z=greater than or equal to1.when the number of functional groups of L that can bind to the metal (M) ion is d, x, y and z are integers satisfying yd+zless than or equal to6x. EXAMPLE - Nickel (II) acetate tetrahydrate (3.8 g) and trimesic acid (2 g) were added to distilled water (100 ml) and stirred at 55degreesC for 2 hours. Powders produced in the solution were separated, washed with distilled water, and then dried at 100degreesC for 2 hours to obtain a crystalline coordination polymer. The obtained crystalline coordination polymer was subjected to a heat treatment under an argon atmosphere at 900degreesC for 1 hour to prepare a carbon-nickel composite material (A) which had the same shape as the untreated crystalline coordination polymer and a reduced volume. (A) was measured using an X-ray diffraction method. As a result, it was determined that the size of the nickel metal particles was 18.3 nm. Although the density of (A) was greater after heat treatment than before heat treatment due to a reduction in volume, the original crystalline structure was maintained. Thus, (A) had a regular shape. (A) was tested for sheet resistance, which was found to be 5.1 mOmega/sq under a pressure of 100 kgf/cm2