We report the fabrication of quantum wells in ZnO nanowires (NWs) by a crystal phase engineering approach. Basal plane stacking faults (BSFs) in the wurtzite structure can be considered as a minimal segment of zinc blende. Due to the existing band offsets at the wurtzite (WZ)/zinc blende (ZB) material interface, incorporation of a high density of BSFs into ZnO NWs results in type II band alignm...

Recently, ZnS quantum dots have attracted a lot of attention since they can be a suitable alternative for cadmium-based quantum dots, which are known to be highly carcinogenic for living systems. However, the structural stability of nanocrystalline ZnS seems to be a challenging issue since ZnS nanoparticles have the potential to undergo uncontrolled structural change at room temperature. Using ...

Ground state properties of SiC, AlN, GaN and InN in the zinc-blende and wurtzite structures are determined using an ab initio scheme. For the selfconsistent field part of the calculations, the Hartree-Fock program Crystal has been used. Correlation contributions are evaluated using the coupledcluster approach with single and double excitations. This is done by means of increments derived for lo...

The rapid progress in semiconductor materials and devices has promoted the development of the sensors industry. Large band gap semiconductors are ideal candidates for a variety of sensor applications. In particular, gallium nitride (GaN) is used as the sensing element for the development of chemical sensors. The recognition mechanism is based on the selective interaction of anions in solution w...

We investigate the correlation between the Ga concentration of the catalyst droplet and the adopted crystal structure of individual GaAs nanowires grown by molecular-beam epitaxy using Au as a catalyst material. Through a postgrowth analysis the Ga content of the catalyst droplet during growth is estimated and related to the observed crystal structure of the nanowires. Depending on the Ga conce...

Photonic crystals are periodically engineered “materials” which are the photonic analogues of electronic crystals. Much like electronic crystal, photonic crystal materials can have a variety of crystal symmetries, such as simple-cubic, closed-packed, Wurtzite and diamond-like crystals. These structures were first proposed in late 1980’s. However, due mainly to fabrication difficulties, working ...

The crystal structures of yellow Cu3PS4 and of black Cu3SbS4 were refined from single crystal X-ray diffraction data. Cu3PS4 crystallizes orthorhombic in an ordered wurtzite superstructure type with the space group Pmn21 (no. 31), a 1⁄4 7.282(1) A, b 1⁄4 6.339(1) A, c 1⁄4 6.075(1) A, V 1⁄4 280.38(8) A3, and Z 1⁄4 2. The refinement converged to R 1⁄4 0.0276, and wR2 1⁄4 0.0710 for 737 unique ref...