Statistical evaluation of morphological parameters of porous nanostructures on the synthesized indium phosphide surface

A constructive method for estimating the surface morphology of nanostructured semiconductors, which consists in determining the main statistical characteristics of the aggregate structure of nanoscale objects on their synthesized surface is presented. In terms of the indium phosphide semiconductor with a synthesized porous layer on its surface, it is shown that the evaluation of the main statistical characteristics allows a deeper understanding of the kinetics of the pore formation process during typical electrochemical treatment of the crystal. The determination of the main statistical metrologically based characteristics (indicators of the distribution center, variation, and shape of the distribution) allows us to understand in more detail view the processes occurring during electrochemical processing of crystals. In the long run, this will make it possible to create nanostructures with predetermined properties, which will become the basis for the industrial production of high-quality nanostructured semiconductors.

Flammable gases produced by TiO2 nanoparticles under magnetic stirring in water

The friction between nanomaterials and Teflon magnetic stirring rods has recently drawn much attention for its role in dye degradation by magnetic stirring in dark. Presently the friction between TiO2 nanoparticles and magnetic stirring rods in water has been deliberately enhanced and explored. As much as 1.00 g TiO2 nanoparticles were dispersed in 50 mL water in 100 mL quartz glass reactor, which got gas-closed with about 50 mL air and a Teflon magnetic stirring rod in it. The suspension in the reactor was magnetically stirred in dark. Flammable gases of 22.00 ppm CO, 2.45 ppm CH4, and 0.75 ppm H2 were surprisingly observed after 50 h of magnetic stirring. For reference, only 1.78 ppm CO, 2.17 ppm CH4, and 0.33 ppm H2 were obtained after the same time of magnetic stirring without TiO2 nanoparticles. Four magnetic stirring rods were simultaneously employed to further enhance the stirring, and as much as 30.04 ppm CO, 2.61 ppm CH4, and 8.98 ppm H2 were produced after 50 h of magnetic stirring. A mechanism for the catalytic role of TiO2 nanoparticles in producing the flammable gases is established, in which mechanical energy is absorbed through friction by TiO2 nanoparticles and converted into chemical energy for the reduction of CO2 and H2O. This finding clearly demonstrates a great potential for nanostructured semiconductors to utilize mechanical energy through friction for the production of flammable gases.

Vacancy Engineering in Nanostructured Semiconductors for Enhancing Photocatalysis

Semiconductor engineering has remained a prominent growing field over the past several decades. Modulating electronic structures and surface properties has sparked considerable interest in -modified photocatalysts. Given -mediated photocatalysis has...

Unraveling electronic band structure of narrow-bandgap p-n nanojunctions in heterostructured nanowires

The electronic band structure of complex nanostructured semiconductors has a considerable effect on the final electronic and optical properties of the material and, ultimately, on the functionality of the devices...