We report poly(3-hexylthiophene) (P3HT) nanowhiskers of monolayer thickness which self-assemble in a dilute solution. These nanowhiskers are tens of micrometers in length, ∼30 nm in width, but only 1.6 nm in thickness, corresponding to the height of P3HT in the side-chain direction. The field-effect mobility of these nanowhiskers reached 1.3 × 10−2 cm2 V−1 s−1.
