Two-dimensional charge transport in self-organized, high-mobility conjugated polymers

Article Abstract:

The microstructure of 70 nm to 100 nm, spin-coated, regioregular poly(3-hexylthiophene) films has been investigated by grazing-incidence X-ray diffraction on parts of the same SiO2/Si substrates on which field-effect transistor devices were fabricated. It was established that, according to processing conditions, the lamellae can adopt two different orientations - parallel and normal to the substrate - with the mobilities of these orientations differing by more than a factor of 100. Evidence for a connection of high-mobility with two-dimensional charge transport offers a strong basis for investigating supramolecular self-organization to boost charge transport in conjugated polymer semiconductors.

Charge transfer

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Dendrimers set to self-destruct

Article Abstract:

Dendrimers are artificial macromolecules, constructed in step-by-step fashion using repetitive chemistry. The combination of multivalency with precision architectures has made dendrimers of increasing interest for bio-medical applications, not least for drug delivery.

Usage, Chemical properties, Dendrimers

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Helical self-assembled polymers from cooperative stacking of hydrogen-bonded pairs

Article Abstract:

Research is presented concerning the development of functionalized monomer units which form non-covalently linked polymeric structures when associated with alkanes or water. The chain length and helicity of the linked polymeric structures is discussed.

Polymers, Chirality, Letter to the Editor, Hydrogen bonding, Hydrogen bonds

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