Hybrid samples based on ZnO colloidal nanocrystals (NCs) deposited on AlGaN/GaN quantum well (QW) structures with different top barrier thickness d = 3, 6 and 9 nm are studied by time-resolved photoluminescence. Thermal behavior of the QW exciton lifetime in the hybrids and in the bare QW structures has been compared and it has been found that the QW exciton recombination rate increases in the ...

The electric-field-induced modulation of surface stabilized ferroelectric liquid crystal (SSFLC) films was investigated with a phase sensitive Raman imaging. We found the technique not only effectively suppresses the nonresonant background of a Raman spectrum, but also yields an insight into the modulated amplitudes and phases of Raman peaks. By using the technique, the electro-optical switchin...

Biopolymers with universal accessibility and inherent biodegradability can offer an appealing sustainable platform to supersede petroleum-based polymers. In this research, a hybrid system derived from cellulose nanocrystals (CNCs) zinc oxide (ZnO) nanoparticles was added into poly (lactic acid) (PLA) improve its mechanical, thermal, flame resistance properties. The ZnO-overlaid CNCs were prepar...

Sand, a cheap and naturally abundant particulate material, was modified with photocatalytic hydrophobic coatings to reduce evaporation loss facilitate the purification of water. The first-level (TiO2 or ZnO nanocrystals) rendered nanoscale roughness on surface sand. additional second-level coating self-assembled monolayer octyltrimethoxysilane (OTS) made sand particles superhydrophobic because ...

Intense visible nano-emitters are key objects for many technologies such as single photon source, bio-labels or energy convertors. Chalcogenide nanocrystals have ruled this domain for several decades. However, there is a demand for cheaper and less toxic materials. In this scheme, ZnO nanoparticles have appeared as potential candidates. At the nanoscale, they exhibit crystalline defects which c...

ZnO microand nanostructures have been produced using a large number of different synthetic routes, and the applications that utilize their unique properties keep increasing. The 3.3 eV direct bandgap and 60 meV exciton binding energy is exploited in ultraviolet optoelectronics, room-temperature lasing, and solar cells applications; extremely long photocarrier lifetimes have been observed yieldi...

The synthesis of ZnO-MgO nanocomposite via modified Pechini method was performed. crystalline structure and the morphology nanocrystals were studied by X-ray diffraction analysis scanning electron microscopy. study on kinetics diazo dye adsorption its photocatalytic decomposition surface It shown that rate process in aqueous solution is described a kinetic equation first order. application allo...