TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The device further comprises a support (1), and two electrodes (2) laid on the support, carbon nanotube (3) providing an electrical contact between the two electrodes. The electrodes have interdigitated comb configuration. The nanotube has a direction substantially perpendicular to two electrodes.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: In the process, the deposit is made by dielectrophoresis. The process comprises a prior step comprising grafting the molecule carrying the group G1 reacting with the chemical compound or a precursor of such group, on the carbon nanotube. The process comprises: optionally, annealing the carbon nanotube having many graphene layers; placing the nanotube annealed by contacting with a solution containing at least one molecule bearing the group G1 for reacting with the chemical compound or a precursor of such group or at least one precursor; subjecting the mixture to non-electrochemical conditions to be grafted, on the nanotube, the molecule or the precursor; and recovering the grafted nanotube obtained after subjecting step and placing on two electrodes, preferably by dielectrophoresis. Preferred Components: The carbon nanotube has a length of 1 mu m to 1 mm. The carbon nanotube is an annealing nanotube. The molecule to be grafted is a salt of cleavable aryl comprising diazonium aryl salts, ammonium aryl salts, phosphonium aryl salts and sulfonium aryl salts, where the aryl group bears the group G for reacting with the chemical compound or a precursor of such group. The molecule to be grafted is a cleavable aryl salt of formula ((R-N2+) A-). The aryl group is optionally mono or polysubstituted, aromatic or heteroaromatic carbon structure, comprising aromatic or heteroaromatic 3-8C cycles, where the heteroatom comprises N, O, P or S, and the substituents contain optionally one or more heteroatoms or 1-6C alkyl groups. The group G1 reacting with the chemical compound is hydroxyl, thiol, azide, epoxide, azyridine, amine, nitrile, isocyanate, thiocyanate, nitro, amide, halogenide preferably alkyl halide, carboxylic acid and ester.A = monovalent anion, preferably halide, halogenoborate, perchlorate, sulfonate, alcoholate or carboxylate; andR = an aryl group R bearing a group G1 capable of reacting with the chemical compound or a precursor of such a group.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The molecule grafted on the carbon nanotube is a polymer or copolymer mainly obtained from many identical and/or different monomer units, where the polymer or copolymer carries at least one group G1 for reacting with the chemical compound or a precursor of such a group. The monomer units are radical polymerizable monomers, preferably, ethylene-type molecules. The monomers are of formula ((R1)(R2)=(R3)(R4)) (II).R1-R4 = non metallic monovalent atom comprising halo, H, or optionally saturated chemical group including alkyl, aryl, nitrile, carbonyl, amine, amide or COOR5 group; andR5 = H or 1-2C, preferably 1-6C alkyl.