New Schottky-Type Wire-Based Solar Cell with NiSi Nanowire Contacts.

Solar cells built with arrays of semiconductor wires have been studied for several years. They present some potential advantages over their bulk counterparts, such as (much) less use of semiconductor material, as well as improved light absorption properties. Most wire-based solar cells are fabricated with arrays of semiconductor p-n junctions, either radial or axial.

Surface Engineering of Room Temperature-Grown Inorganic Perovskite Quantum Dots for Highly Efficient Inverted Light-Emitting Diodes.

Inorganic cesium lead bromide quantum dots (CsPbBr QDs) are usually synthesized via a high-temperature process (hot injection, HI). This process is similar to that used for the synthesis of other semiconductor QDs (i.e.

Graphene-Coated Aluminum Thin Film Anodes for Lithium-Ion Batteries.

We present a detailed study on graphene-coated aluminum thin films for Li-ion battery anode applications. The best electrode ageing behavior is obtained for Al films encapsulated with four porous graphene layers. Graphene encapsulation prevents "crushed" Al nanoparticles from detaching from the anode, thus allowing prolonged charge-discharge cycling.

Ligand removal and photo-activation of CsPbBr quantum dots for enhanced optoelectronic devices.

Perovskite quantum dots have recently emerged as a promising light source for optoelectronic applications. However, integrating them into devices while preserving their outstanding optical properties remains challenging. Due to their ionic nature, perovskite quantum dots are extremely sensitive and degrade on applying the simplest processes.

Rubidium as an Alternative Cation for Efficient Perovskite Light-Emitting Diodes.

Incorporation of rubidium (Rb) into mixed lead halide perovskites has recently achieved record power conversion efficiency and excellent stability in perovskite solar cells. Inspired by these tremendous advances in photovoltaics, this study demonstrates the impact of Rb incorporation into MAPbBr-based light emitters. Rb partially substitutes MA (methyl ammonium), resulting in a mixed cation perovskite with the formula MARb PbBr.

Publisher's Note: Si Nanoribbons on Ag(110) Studied by Grazing-Incidence X-Ray Diffraction, Scanning Tunneling Microscopy, and Density-Functional Theory: Evidence of a Pentamer Chain Structure [Phys. Rev. Lett. 117, 276102 (2016)].

This corrects the article DOI: 10.1103/PhysRevLett.117.

Si Nanoribbons on Ag(110) Studied by Grazing-Incidence X-Ray Diffraction, Scanning Tunneling Microscopy, and Density-Functional Theory: Evidence of a Pentamer Chain Structure.

We report a combined grazing incidence x-ray diffraction (GIXD), scanning tunneling microscopy (STM), and density-functional theory (DFT) study which clearly elucidates the atomic structure of the Si nanoribbons grown on the missing-row reconstructed Ag(110) surface. Our study allows us to discriminate between the theoretical models published in the literature, including the most stable atomic configurations and those based on a missing-row reconstructed Ag(110) surface. GIXD measurements unambiguously validate the pentamer model grown on the reconstructed surface, obtained from DFT.

[Psychosocial issues of mothers whose children have sickle cell disease].

Objectives: To study and describe the psychological responses (depression and anxiety), the coping strategies, and the impact of sickle cell disease on the quality of life (QOL) of mothers.

Patients And Methods: A cross-sectional study of mothers with affected children was conducted at the university hospital center of Brazzaville, between February and April 2014. Hamilton and Beck scales, the Brief-COPE, and the Short Form Health Survey were used to assess anxiety, depression, coping strategies, and QOL, respectively.

Nanostructured conducting polymers for stiffness controlled cell adhesion.

Unlabelled: We propose a facile and reproducible method, based on ultra thin porous alumina membranes, to produce cm(2) ordered arrays of nano-pores and nano-pillars on any kind of substrates. In particular our method enables the fabrication of conducting polymers nano-structures, such as poly[3,4-ethylenedioxythiophene]:poly[styrene sulfonate] (

Pedot: PSS). Here, we demonstrate the potential interest of those templates with controlled cell adhesion studies.

[Epidemiology and outcome of Congolese children who had surgery for heart defects].

Aims: to determine the principal heart defects for which children underwent surgery and to determine the survival rate.

Patient And Methods: this retrospective cohort study involves Congolese babies treated surgically from September 1989 to September 2010 in France for congenital heart defects (through "Mécénat chirurgie cardiaque" and "Chaîne de l'espoir"). It includes only 110 of the 182 recorded patients during the study period.

Significant enhancement of the electrical transport properties of graphene films by controlling the surface roughness of Cu foils before and during chemical vapor deposition.

We have studied the influence of the surface roughness of copper foils on the sheet resistance of graphene sheets grown by chemical vapor deposition. The surface roughness of the copper foils was reproducibly controlled by electropolishing. We have found that the graphene sheet resistance monotonically decreases as the surface roughness of the copper foils decreases.

[Short-term prognosis of heart diseases managed at the pediatric intensive care unit of the Brazzaville University Hospital].

Objective: To determine the main heart diseases of children admitted to our pediatric intensive care unit.

Patients And Methods: This cross-sectional study was conducted in 2011 (January to December) in the pediatric intensive care of the Brazzaville University Hospital.

Results: The study included 42 children, 27 of them girls (64.

[Priapism in children and adolescents with homozygous sickle cell disease in Brazzaville].

Objective: To determine the prevalence of priapism, assess knowledge and appreciate its characteristics in childhood sickle cell disease.

Methodology: A case-control study was conducted at the University Hospital of Brazzaville (Department of Pediatrics, Hematology and Clinical Urology). The cases consisted of 202 sickle cell anemia who are at least 5 years.

[Tooth decay in school environment at Brazzaville (Congo)].

Aim: To determine the frequency of dental caries and habits that can be the cause of this disease in Brazzaville.

Methods: A prospective study was conducted in primary schools between February and May 2010. This study involved a sample of 307 students of both sexes, aged 4-15 years from school in the city of Brazzaville.

Methicillin-resistant Staphylococcus aureus endocarditis and de novo development of daptomycin resistance during therapy.

Daptomycin resistance in Staphylococcus aureus has been previously reported, but the development of resistance while on therapy with subsequent clinical failure for endocarditis has been infrequently reported. A case of persistent methicillin-resistant S aureus (MRSA) bacteremia in the setting of right-sided endocarditis in a 38-year-old man with a history of intravenous drug use is presented. He developed de novo resistance to daptomycin during therapy after several courses of antibiotics, with subsequent clinical failure.

Clinical review: medication errors in critical care.

Medication errors in critical care are frequent, serious, and predictable. Critically ill patients are prescribed twice as many medications as patients outside of the intensive care unit (ICU) and nearly all will suffer a potentially life-threatening error at some point during their stay. The aim of this article is to provide a basic review of medication errors in the ICU, identify risk factors for medication errors, and suggest strategies to prevent errors and manage their consequences.

Prevalence of virulence markers of enteric Campylobacter in France and Tunisia.

Forty-nine strains of Campylobacter jejuni and C. coli were isolated from the stools of 49 patients clinically documented for diarrhoea and fever, and living either in the Paris metropolitan area (30) or in the Tunis area (19). The strains were identified biotyped, serotyped and studied for association with HeLa cells and the ability to elongate Chinese ovary cells (CHO).