Thermal conductivity of a h-BCN monolayer.

A hexagonal graphene-like boron-carbon-nitrogen (h-BCN) monolayer, a new two-dimensional (2D) material, has been synthesized recently. Herein we investigate for the first time the thermal conductivity of this novel 2D material. Using molecular dynamics simulations based on the optimized Tersoff potential, we found that the h-BCN monolayers are isotropic in the basal plane with close thermal conductivity magnitudes.

Thermal stability and thermal conductivity of phosphorene in phosphorene/graphene van der Waals heterostructures.

Phosphorene, a new two-dimensional (2D) semiconducting material, has attracted tremendous attention recently. However, its structural instability under ambient conditions poses a great challenge to its practical applications. A possible solution for this problem is to encapsulate phosphorene with more stable 2D materials, such as graphene, forming van der Waals heterostructures.

Atomic vacancies significantly degrade the mechanical properties of phosphorene.

Due to low formation energies, it is very easy to create atomic defects in phosphorene during its fabrication process. How these atomic defects affect its mechanical behavior, however, remain unknown. Here, we report on a systematic study of the effect of atomic vacancies on the mechanical properties and failure behavior of phosphorene using molecular dynamics simulations.

Thermal conductivities of single- and multi-layer phosphorene: a molecular dynamics study.

As a new two-dimensional (2D) material, phosphorene has drawn growing attention owing to its novel electronic properties, such as layer-dependent direct bandgaps and high carrier mobility. Herein we investigate the in-plane and cross-plane thermal conductivities of single- and multi-layer phosphorene, focusing on geometrical (sample size, orientation and layer number) and strain (compression and tension) effects. A strong anisotropy is found in the in-plane thermal conductivity with its value along the zigzag direction being much higher than that along the armchair direction.

[Early prediction of preeclampsia and the preventive effect of qiju dihuang oral liquid on preeclampsia patients: a clinical study].

Objective: To study the clinical value of the preeclampsia risk assessment system, and to explore the preventive effect of Qiju Dihuang Oral Liquid (QDOL) on preeclampsia patients.

Methods: Totally 2 000 pregnant women in the gestational week 16 -20 were equally assigned to Group A and Group B by randomized sampling. Their preeclampsia incidence was respectively assessed by preeclampsia risk assessment system and mean arterial pressure method.