Improved Gas Sensing Capabilities of MoS/Diamond Heterostructures at Room Temperature.

Molybdenum disulfide (MoS) and nanocrystalline diamond (NCD) have attracted considerable attention due to their unique electronic structure and extraordinary physical and chemical properties in many applications, including sensor devices in gas sensing applications. Combining MoS and H-terminated NCD (H-NCD) in a heterostructure design can improve the sensing performance due to their mutual advantages. In this study, the synthesis of MoS and H-NCD thin films using appropriate physical/chemical deposition methods and their analysis in terms of gas sensing properties in their individual and combined forms are demonstrated.

A wide-angle X-ray scattering laboratory setup for tracking phase changes of thin films in a chemical vapor deposition chamber.

The few-layer transition metal dichalcogenides (TMD) are an attractive class of materials due to their unique and tunable electronic, optical, and chemical properties, controlled by the layer number, crystal orientation, grain size, and morphology. One of the most commonly used methods for synthesizing the few-layer TMD materials is the chemical vapor deposition (CVD) technique. Therefore, it is crucial to develop in situ inspection techniques to observe the growth of the few-layer TMD materials directly in the CVD chamber environment.

Correction: Tuning the charge carrier mobility in few-layer PtSe films by Se : Pt ratio.

[This corrects the article DOI: 10.1039/D1RA04507E.].

Tuning the charge carrier mobility in few-layer PtSe films by Se : Pt ratio.

Recently, few-layer PtSe films have attracted significant attention due to their properties and promising applications in high-speed electronics, spintronics and optoelectronics. Until now, the transport properties of this material have not reached the theoretically predicted values, especially with regard to carrier mobility. In addition, it is not yet known which growth parameters (if any) can experimentally affect the carrier mobility value.

Optical Characterization of Few-Layer PtSe Nanosheet Films.

Thin films of transition-metal dichalcogenides are potential materials for optoelectronic applications. However, the application of these materials in practice requires knowledge of their fundamental optical properties. Many existing methods determine optical constants using predefined models.

Specifics of the data processing of precession electron diffraction tomography data and their implementation in the program PETS2.0.

Electron diffraction tomography (EDT) data are in many ways similar to X-ray diffraction data. However, they also present certain specifics. One of the most noteworthy is the specific rocking curve observed for EDT data collected using the precession electron diffraction method.

Meridional focusing of X-rays diffracted onto a single crystal with a transversal groove (Bragg-diffraction asymmetric lens).

It is shown that a properly designed transversal groove machined into the surface of a single-crystal monochromator may concentrate (focus) the diffracted radiation meridionally. From this result and from previous papers on the Bragg-diffraction inclined lens it follows that a properly designed depression fabricated into the surface of a single-crystal monochromator should provide two-dimensional focusing of a diffracted synchrotron radiation beam.

Biochemical and molecular analyses in three patients with 3-hydroxy-3-methylglutaric aciduria.

Two methods, spectrophotometry and HPLC, were compared in the analyses of 3-hydroxy-3-methylglutaryl-CoA lyase (HL) activity in three unrelated Czech patients with 3-hydroxy-3-methylglutaric (HMG) aciduria and their family members. The HL activities in cultured fibroblasts and/or isolated lymphocytes of probands were below the detection limits of the methods used. Both methods were also suitable for recognition of all heterozygotes in affected families.

First observation of meridional focusing of an X-ray beam using diffraction by a crystal with a transverse groove.

The possibility of concentrating a synchrotron X-ray beam using diffraction by a single crystal with a properly designed transverse groove on its surface, suggested earlier, has been studied experimentally. Here, the first experimental demonstration of this effect is reported, performed on beamline BM5 at the ESRF. The experimental result confirms the theoretical model.