Optical Constants and Structural Properties of Epitaxial MoS Monolayers.

Two-dimensional layers of transition-metal dichalcogenides (TMDs) have been widely studied owing to their exciting potential for applications in advanced electronic and optoelectronic devices. Typically, monolayers of TMDs are produced either by mechanical exfoliation or chemical vapor deposition (CVD). While the former produces high-quality flakes with a size limited to a few micrometers, the latter gives large-area layers but with a nonuniform surface resulting from multiple defects and randomly oriented domains.

Optical Constants of Chemical Vapor Deposited Graphene for Photonic Applications.

Graphene is a promising building block material for developing novel photonic and optoelectronic devices. Here, we report a comprehensive experimental study of chemical-vapor deposited (CVD) monolayer graphene's optical properties on three different substrates for ultraviolet, visible, and near-infrared spectral ranges (from 240 to 1000 nm). Importantly, our ellipsometric measurements are free from the assumptions of additional nanometer-thick layers of water or other media.

Are Trends in Alcohol Consumption and Cause-Specific Mortality in Russia Between 1990 and 2017 the Result of Alcohol Policy Measures?

Objective: The purpose of this study was to analyze trends in alcohol consumption and mortality and their association with alcohol control measures in Russia between 1990 and 2017.

Method: Analysis of trends for all-cause mortality and alcohol-related mortality, life expectancy, and total adult per capita alcohol consumption and their relationship were conducted. A narrative literature review of alcohol control policies since 1990 was done.

[The quality of research publications in psychiatry].

Aim: To evaluate the quality of research articles in psychiatry and addiction medicine published in 2015.

Material And Methods: Five experts analyzed 51 research publications from 13 psychiatric and addiction medicine journals using a standardized questionnaire, which contains 4 general questions (type or results of the study) and 21 questions on the quality of the study.

Results: Only 2 articles (4%) met all criteria, 64% of the articles refer to the methodologically least demonstrative (uncontrolled/one-time, series of cases, non-randomized).