Strong interface scattering induced low thermal conductivity in Bi-based GeTe/BiTe superlattice-like materials.

The thermal conductivities of GeTe/BiTe superlattice-like materials are calculated based on density functional perturbation theory (DFPT) and measured using a 3ω method. The calculated results show that the lattice thermal conductivity or thermal diffusivity of GeTe/BiTe superlattice-like materials significantly decrease due to the effects of interfaces and Bi atoms in BiTe. Our measured results are in line with the theoretical calculations, and reach an extremely low thermal conductivity at 0.

Wear and Corrosion Resistance of AlCoCrCuFeNi High-Entropy Alloy Coating Deposited on AZ91D Magnesium Alloy by Laser Cladding.

In order to improve the wear and corrosion resistance of an AZ91D magnesium alloy substrate, an AlCoCrCuFeNi high-entropy alloy coating was successfully prepared on an AZ91D magnesium alloy surface by laser cladding using mixed elemental powders. Optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction were used to characterize the microstructure of the coating. The wear resistance and corrosion resistance of the coating were evaluated by dry sliding wear and potentiodynamic polarization curve test methods, respectively.

Synthesis of Histidine-Containing Oligopeptides via Histidine-Promoted Peptide Ligation.

Histidine-containing peptides are valuable therapeutic agents for a treatment of neurodegenerative diseases. However, the synthesis of histidine-containing peptides is not trivial due to the potential of imidazole sidechain of histidine to act as a nucleophile if unprotected. A peptide ligation method utilizing the imidazole sidechain of histidine has been developed.

In situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) study of formaldehyde adsorption and reactions on Pd-doped nano-γ-Fe₂O₃ films.

Palladium-doped nano-γ-Fe₂O₃ films were printed on Al₂O₃ substrates by screen printing-injecting hybrid technology. X-ray diffraction and scanning electron microscopy techniques were used to characterize the phase structures and morphologies of the films, respectively. The sensitivity of the films to 100 ppm formaldehyde in air was investigated.

Nanoscale SnO2 flat-type coplanar hexanal gas sensor arrays at ppb level.

Hexanal is one of the most important aroma compounds which play a crucial role in the odor of cereal, meat, fruit, plant oils and wood. The detection technique of hexanal has attracted more attention. In this paper, the nano-SnO2 flat-type coplanar hexanal gas-sensor arrays were fabricated by screen-printing technique based on nano-SnO2 powders prepared by hydrothermal method.

The production and characteristics of solid lipid nanoparticles (SLNs).

Modified high shear homogenization and ultrasound techniques were employed to produce solid lipid nanoparticles (SLNs). Model drug mifepristone had been incorporated in SLNs. The mean particle size measured by laser diffractometry (LD) was found to be 106 nm with a narrow particle distribution of polydispersity index, 0.