NOVELTY - Conducting device comprises two conductive metallic materials whose surfaces, respectively (S) and (S1) are electrically interconnected by an organic material comprising organic supramolecular fibrillar species comprising a combination of conductive triarylamine compounds (I).    USE - The supramolecular fibrillar species comprising (I) is useful for connecting together the surfaces (S) and (S1) of two conductive electrodes (claimed), that are used in electronic and optoelectronic devices, such as LEDs, organic LEDs, field effect transistors (FETs) and organic FETs and photovoltaic devices such as solar cells. (I) is useful for the manufacture or repair of electronic circuits (including printed circuits), where an electrical connection must be established between components, for example, after breakage.    ADVANTAGE - The supramolecular fibrillar species comprising (I) provides a precise, simple, repeatable, effective and inexpensive method to electrically connect two solid conductors. The supramolecular fibrillar species are purely organic, and avoids the need for additional metal cations which are conventionally used as dopants in many conductive organic polymers, hence eliminates the toxic impact on the environment. The supramolecular fibrillar species are extremely beneficial alternative to organic compounds such as polymers and conjugates that are obtained by more complicated synthesize method. The supramolecular fibrillar species deposited on the surface (S) are stable at room temperature as well as at higher temperatures.    DETAILED DESCRIPTION - Conducting device comprises two conductive metallic materials whose surfaces, respectively (S) and (S1) are electrically interconnected by an organic material comprising organic supramolecular fibrillar species comprising a combination of conductive triarylamine compounds of formula (I).    A1, A2 = single covalent bond, -O-, -S-, -NH-, -NH-(C=O)- or-NR3;    R1-R3 = aryl (preferably benzyl), 4-30C hydrocarbyl or polyethylene glycol; and    R = terminating group comprising 1-10C hydrocarbyl chain, optionally halogenated and optionally interrupted by one or more heteroatoms comprising N, O or S.    INDEPENDENT CLAIMS are included for:    (1) modifying a surface (S) of a solid conductive material, comprising (E) applying a potential difference, preferably a negative potential between the surface (S) and a surface (S1) of another conductive solid material disposed opposite to the surface (S), and simultaneously contacting the surface (S) with a liquid medium comprising a solution of (I), while subjecting (I) to electromagnetic radiation or to a chemical or electrochemical oxidation to convert to at least partly triarylammonium radicals; and    (2) a conductive material surface modified by supramolecular fibrillar species comprising (I).