Biomimetic strain-sensing microstructure for improved strain sensor: Fabrication results and optical characterization

Alkali-doped Metal-phthalocyanines: Electronic Properties and Structure

Ambipolar Cu- and Fe-phthalocyanine single-crystal field-effect transistors

We report the observation of ambipolar transport in field-effect transistors fabricated on single crystals of copper- and iron-phthalocyanine, using gold as a high work-function metal for the fabrication of source and drain electrodes. In these devices, the room-temperature mobility of holes reaches 0.3?cm2/V?s in both materials. The highest...

Organometaalverbinding met instelbare magnetische eigenschappen

Alkali-doped metal-phthalocyanine and pentacene compounds

The ability to introduce charge carriers in organic molecular materials and control their concentration is of great relevance for both fundamental research and applications. In this thesis, it has been demonstrated that the electronic properties of Metal Phthalocyanines (MPc) and pentacene (PEN) molecular materials can be tuned by controlling...

Shot Noise in Ballistic Graphene

Evidence for the formation of a Mott state in potassium-intercalated pentacene

We investigate electronic transport through pentacene thin films intercalated with potassium. From temperature-dependent conductivity measurements we find that potassium-intercalated pentacene shows metallic behavior in a broad range of potassium concentrations. Surprisingly, the conductivity exhibits a re-entrance into an insulating state when...

Magnetotransport through graphene nanoribbons

We investigate magnetotransport through graphene nanoribbons as a function of gate and bias voltage, and temperature. We find that a magnetic field systematically leads to an increase in the conductance on a scale of a few tesla. This phenomenon is accompanied by a decrease in the energy scales associated to charging effects, and to hopping...