Abstract
The influence of molecular interactions is wide ranging, affecting properties as diverse as luminescence, electrical transport (charge hopping and, thus, interstrand mobility and spin coherence length), as well as chemical and mechanical stability. Accurate control of such interactions is needed to allow optimum exploitation of the properties of molecular materials, not only in today's most common optoelectronic devices such as light-emitting diodes (LEDs), field-effect transistors (FETs), and photovoltaic diodes (PVDs), but also in new or emerging applications, for example in the area of artificial noses and muscles or in general for nanoelectromechanical systems (NEMS). Controlled and directed self-organization is the ultimate instrument for achieving such an aim, as it is only by mastering noncovalent interactions that control at the molecular level can be achieved.