Size-Dependent InAlO₃(ZnO)_m Nanowires with a Perfect Superlattice Structure

Abstract

InAlO 3 (ZnO) m superlattice nanowires are successfully synthesized via chemical vapor deposition, using Au catalyst. High-resolution transmission electron microscopy observations indicate that these nanowires consist of an alternative stacking of InO 2 layers and AlO(ZnO) m + blocks along the [0001] direction. The periodicity of these nanowires is proportional to their diameter, which is determined by the Au alloy particle size at the tip of the nanowire. The linear relationship between the periodicity and the diameter is well explained by a cylindrical configuration model. Our results indicate that controlled synthesis of InAlO 3 (ZnO) m superlattice nanowires becomes possible. The photoluminescence properties of InAlO 3 (ZnO) m superlattice nanowires were studied.

Mesostructured Composite Materials with Electrically Tunable Upconverting Properties

“…An alternative method involves an upconversion www.small-journal.com their unique properties, such as the narrow-line emission, and nonblinking emission, [13][14][15] which can be tuned over a wide spectral range by selecting suitable dopant ions. Although the spectral features of the lanthanides ions remain largely unaffected by the host materials, the upconversion effi ciency depends on the solid matrix structure of the ion-hosting medium [16][17][18] and often leads to polarized emission of individual nanoparticles due to the intraions transition properties and local crystal symmetry of rare earth ions. [ 19 ] However, such polarization-dependent properties lack tunability by external stimuli and are not inherited by colloidal nanoparticle dispersions due to random orientations of these anisotropic particles within dispersions, indicating the requisites of a host material which can direct and control the location and orientations of nanoparticles.…”

Ab Initio Based Surface-Hopping Dynamics Study on Ultrafast Internal Conversion in Cyclopropanone

“…2,6,8,[19][20][21][22][23][24][25][26][27][28][29][30][31] Carbonyl compounds as one representative of medium size polyatomic molecules have been systematically and extensively studied due to their importances in organic photochemistry. [32][33][34][35][36][37][38][39][40][41][42][43] In comparison with aliphatic and aromatic carbonyl compounds, the cyclic carbonyl compounds gain few attention, especially for their photodissociation dynamics. Cyclic carbonyl compounds have a unique characteristic-strong ring tension-that could cause the ring-opening reaction to occur fast, even ultrafast, in the excited states or the ground state.…”

Structural features and thermoelectric properties of Al‐doped (ZnO)5In2O3 homologous phases

“…According to other literature reports, Al ions with much smaller ionic radii should predominantly occupy only the trigonal bi-pyramidal sites in the Zn/In zig-zag defect, having less influence on the charge-carrier concentration and the electrical conductivity mechanisms. 32,33,[37][38][39] However, the preferential incorporation of Al into the bi-pyramidal sites has not been confirmed by DFT calculations 32,37,40 and was not observed experimentally so far. 39 This creates doubts about the actual incorporation sites of the Al ions inside the (ZnO) k InMO 3 system and their influence on the TE properties.…”

“…32,33,[37][38][39] However, the preferential incorporation of Al into the bi-pyramidal sites has not been confirmed by DFT calculations 32,37,40 and was not observed experimentally so far. 39 This creates doubts about the actual incorporation sites of the Al ions inside the (ZnO) k InMO 3 system and their influence on the TE properties. Therefore, in this work we studied the influence of Al doping on the structural parameters of the (ZnO) 5 In 2 O 3 homologous phase with a perfectly periodic superlattice structure, and the thermoelectric characteristics of the (ZnO) 5 For the X-ray diffraction measurements, sintered samples were pulverized in an agate mortar and analyzed with an X'Pert PRO MPD diffractometer (PANalytical, Almelo, the Netherlands), utilizing Cu-Ka radiation.…”