New publication: "Local disorder at the phase transition interrupts ambipolar charge carrier transport in large crystal methylammonium lead iodide thin films" by Alexander Biewald, Nadja Giesbrecht, Thomas Bein, Pablo Docampo, Achin Hartschuh and Richard Ciesielski

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New publication: "Non-linear Raman scattering intensities in graphene ", by Veit Giegold, Lucas Lange, Richard Ciesielski and Achim Hartschuh

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New publication: "Controling photon antibunching from 1D emitters using optical antennas", Lucas Lange, Frank Schäfer, Alexander Biewald, Richard Ciesielski and Achim Hartschuh

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New Publication: "Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry", Nicolai F. Hartmann, Matthew Otten, Igor Fedin, Dmitri Talapin, Moritz Cygorek, Pawel Hawrylak, Marek Korkusinski, Stephen Gray, Achim Hartschuh and Xuedan Ma

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Universitaet Muenchen
Department Chemie
Butenandtstr. 5-11 (Haus E, Gerhard-Ertl-Gebaeude)
81377 Muenchen

Phone: +49 89 2180 77515
Mail: Prof. A. Hartschuh
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CdSe nanowires

Inorganic semiconducting nanowires are promising candidates as building blocks in nanoscale optoelectronics, photovoltaics, and sensing devices owing to their unique physical properties. In thin cadmium selenide (CdSe) nanowires (NWs), diameter-dependent quantum confinement controls the electronic band gap energy, a key parameter in potential applications. In addition, the band gap energy is known to depend on the crystal phase, since wurtzite and zinc-blende phase are stable in the nanowires. Nanoscale phase variations with alternating wurtzite and zinc-blende segments along the nanowires have been suggested as the origin of the large spectral width of the observed photoluminescence bands. The extension of TENOM as a standard technique also for inorganic nanowires would lead to a further progress in the investigation and understanding of their optical properties on nanometer length scales.

TEM image of a branched CdSe NW. Inset: HRTEM image showing crystal phase variations.