TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Nanoparticle: The nanoparticle is at least partially semiconducting; and comprises a transition metal, an inert metal, a catalytic metal, a platinum group metal, or their alloy. The metal is Cd, Pb, Ga, Cu and/or their alloy.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The nanoparticle is bonded to at least one metal center present in a metal complex residue in the at least partially electrically conductive oligomer, polymer, or copolymer by a covalent and/or ionic bond. The nanoparticle is grown from at least one metal center in a metal complex residue in the at least partially electrically conductive oligomer, polymer, or copolymer. The partially electrically conductive oligomer, polymer, or copolymer comprises a residue represented by formula (I).M'=metal.Preferred Method: The partially electrically conductive copolymer comprises both metal complex residues having at least one metal center; and residues not having metal complexes. In the method (m1), the first step involves providing a first monomer deposited onto at least a portion of a substrate; and polymerizing the first monomer. The first monomer is electropolymerized. The method (m1) further involves providing a second monomer deposited onto at least a portion of a substrate; and copolymerizing the first monomer and the second monomer. The molar ratio of the first monomer to the second monomer is 1:1 to 1:100. Preferred Copolymer: The copolymer comprises a residue of formula (IV); or a nanoparticle produced from them.m=1-100000;Y5 and Y6=O, S or NH;andR7 and R8=2 substituents selected from hydrogen and optionally substituted organic residue comprising 1-12C. Preferred Definitions:    M1=Cd;and    ring A'=-N-CH2-C(CH3)2-CH2-N-, -N-phenylen-1,2-diyl-N- or -N-(CH2)2-O-(CH2)2-O-(CH2)2-N-.    SPECIFIC COMPOUNDS - 3 Compounds are specifically claimed as (II) i.e. N,N'-((2,2'-dimethyl)propyl)bis(5-(2,2'bithiophene-5-yl) salcylideniminatocadmium (IA), N,N'-(1,2-phenylene)bis(5-(2,2'bithiophene-5-yl) salcylideniminatocadmium and N,N'-(1,2-bis(2-ethoxy)ethyl)bis(5-(2,2'bithiophene-5-yl) salcylideniminatocadmium.    EXAMPLE - To a mixture of 5-bromosalcylaldehyde (3.5 g), and Pd(PPh3)2Cl2 (0.613 g) in dry toluene (40 ml) was added 2-(tributylstannyl)bithiophene (9.56 g). The reaction mixture was heated to 80 degrees C for 48 hours under argon. The reaction was cooled and dried in vacuo to give a yellow solid. The solid was worked up to give 5-(2,2'-bithiophene-5-yl)-2-hydroxybenzaldehyde (a1) (3.96g, 79%). To a solution of (a1) (1 g) dissolved in CH2Cl2 (200 ml) was added EtOH (200 ml), and 1,3-diamino-2,2'-dimethylpropane (0.1784 g). The reaction mixture was stirred at room temperature for 8 hours, and then worked up to give N,N'-((2,2'-dimethyl)propyl)bis(5-(2,2'-bithiophene-5-yl)salcylidenimine (b1) (0.954 g, 86%). To a solution of (b1) (130 mg) in CH2Cl2 (30 ml) was added a solution of NaH (10 mg) in MeOH (15 ml). Cd(OAc)2-2H2O was dissolved in MeOH (15 ml) then added to the reaction mixture. The reaction was heated to 50 degrees C and left to stir for 8 hours. After work up N,N'-((2,2'-dimethyl)propyl)bis(5-(2,2'bithiophene-5-yl) salcylideniminatocadmium was obtained.