Highly ordered alignment of conducting nano-crystallites on organic semiconductor single crystal surfaces

A conducting thin layer of aligned fibrous nano-crystallites of tetrathiafulvalene–7,7,8,8,-tetracyanoquinodimethane (TTF–TCNQ) is fabricated directly on semiconducting organic crystals under ambient conditions. The widths of the crystallites are 50–100nm. Their growth direction is governed by the direction of the intermolecular charge transfer interactions in the substrate crystal. The carrier transport in the film is metallic between 150K and 300K, reflecting the uniform alignment of the TTF–TCNQ nano-crystallites on the substrate crystal. •Highly ordered tetrathiafulvalene–tetracyanoquinodimethane thin film is fabricated.•The film grows under ambient conditions.•The carrier transport in the film is metallic between 150K and 300K.•Crystal growth mechanism is investigated.