Abstract
Langmuir−Blodgett (LB) films of 1:1 mixture between an electron donor of amphiphilic bis-tetrathiafulvalene (TTF) macrocycle (1) and an electron acceptor of 2,3,5,6-tetrafluoro-7,7′,8,8′-tetracyano-p-quinodimethane (F4-TCNQ) were fabricated on substrate surface. Formation of molecular-assembly nanowires was observed on mica surface, whose typical dimension was 3 nm (height) × 50 nm (width) × 1000 nm (length). The one-dimensional nanowires were composed of completely charge-transferred (12+)(F4-TCNQ−)2, which coexisted with two-dimensional domains of nanowire bundles of neutral 10. Room temperature electrical conductivity of 20-layer LB film for 1:1 mixed monolayer of 1 and F4-TCNQ was 8.3 × 10−4 S cm−1. The film showed a semiconducting temperature dependence with an activation energy of 0.30 eV, which was 〜0.1 eV larger than that of (12+)(F4-TCNQ−)2 LB film.

doi:10.1016/j.colsurfa.2005.10.094