Evolution of amorphous ruthenium nanoclusters into stepped truncated nano-pyramids on graphitic surfaces boosts hydrogen production from ammonia.

Atomic-scale changes can significantly impact heterogeneous catalysis, yet their atomic mechanisms are challenging to establish using conventional analysis methods. By using identical location scanning transmission electron microscopy (IL-STEM), which provides quantitative information at the single-particle level, we investigated the mechanisms of atomic evolution of Ru nanoclusters during the ammonia decomposition reaction. Nanometre-sized disordered nanoclusters transform into truncated nano-pyramids with stepped edges, leading to increased hydrogen production from ammonia.

Direct formation of copper nanoparticles from atoms at graphitic step edges lowers overpotential and improves selectivity of electrocatalytic CO reduction.

A key strategy for minimizing our reliance on precious metals is to increase the fraction of surface atoms and improve the metal-support interface. In this work, we employ a solvent/ligand/counterion-free method to deposit copper in the atomic form directly onto a nanotextured surface of graphitized carbon nanofibers (GNFs). Our results demonstrate that under these conditions, copper atoms coalesce into nanoparticles securely anchored to the graphitic step edges, limiting their growth to 2-5 nm.

Chemical Kinetics of Metal Single Atom and Nanocluster Formation on Surfaces: An Example of Pt on Hexagonal Boron Nitride.

The production of atomically dispersed metal catalysts remains a significant challenge in the field of heterogeneous catalysis due to coexistence with continuously packed sites such as nanoclusters and nanoparticles. This work presents a comprehensive guidance on how to increase the degree of atomization through a selection of appropriate experimental conditions and supports. It is based on a rigorous macro-kinetic theory that captures relevant competing processes of nucleation and formation of single atoms stabilized by point defects.

Selective suppression of {112} anatase facets by fluorination for enhanced TiO particle size and phase stability at elevated temperatures.

Generally, anatase is the most desirable TiO polymorphic phase for photovoltaic and photocatalytic applications due to its higher photoconductivity and lower recombination rates compared to the rutile phase. However, in applications where temperatures above 500 °C are required, growing pure anatase phase nanoparticles is still a challenge, as above this temperature TiO crystallite sizes are larger than 35 nm which thermodynamically favors the growth of rutile crystallites. In this work, we show strong evidence, for the first time, that achieving a specific fraction (50%) of the {112} facets on the TiO surface is the key limiting step for anatase-to-rutile phase transition, rather than the crystallite size.

The significance of the nursing actions in psychiatric hospitalization of female adolescent users of psychoactive substances.

Objective: To understand the significance of the actions developed by the nursing team in a Psychiatric Inpatient Unit for adolescent female users of psychoactive substances in the light of Alfred Schutz's phenomenological sociology framework.

Method: Qualitative study with Alfred Schutz's Phenomenological Sociology approach. Four nurses and 17 nursing assistants and technicians from a General Hospital in the city of Porto Alegre participated in the study.

Assessment of components of crack users' attention network.

Objective: Assess components of the Psychosocial Attention Network (RAPS) in crack user care in a Rio Grande do Sul municipality.

Method: Qualitative study based on Fourth Generation Evaluation. Data collection occurred in 2014, through participating observation and interviews based on the Hermeneutic-Dialectic Circle.

Synergizing nanocomposites of CdSe/TiO2 nanotubes for improved photoelectrochemical activity via thermal treatment.

In this work, we show the effect of the thermal treatment temperature on the photoelectrochemical (PEC) activity of CdSe/TiO2 nanocomposites. TiO2 nanotubes (NTs) were synthesized by anodization and the nanocomposites were obtained by depositing CdSe clusters via magnetron sputtering. A two-step thermal treatment was performed: heating the TiO2 NTs at different temperatures prior to CdSe deposition and further heating the CdSe/TiO2 nanocomposites.

[Group and group interaction in nurses' activities: a needed knowledge].

This study aimed at verifying the knowledge of nurses about groups and group functioning, as well as knowing which premises found their activities as coordinators of their working teams. The research was outlined by the descriptive-exploratory approach, carried out in a university hospital in Porto Alegre, Brazil. The results show that 97% of the participants like group work while 77.

[The many faces of contact in caring].

This paper emerged from a group experience about a theme related to human care: the contact. The experience is described, unveiling feelings and memories perceived while constructing the activity, building a concept of contact, here seen as one of the fundaments of human care. Human care was studied on an anthropological approach, lived in a group technique.

[Nursing care of propedeutic and therapeutic nature and its interface with other professional actions].

This paper is based on a qualitative research, with an approach based on phenomenological hermeneutics. Its aim is to understand the singularities of nursing therapeutic and propedeutic care actions and their interfaces with the actions of other professionals. The participants are five nurses from the Trauma Intensive Care Unit of an university hospital.

[Connecting care models and trends in health education: grants for nursing education].

In this article the authors establish a connection between health care models and pedagogical trends considering their education and health care experiences in the hospital and in the communities and also the review of the literature. The pedagogical trends and health care models used by nurses in nursing education demonstrate their world view. Therefore it is important that they understand what is behind their practice so that nursing is in a political and historical context and its practice can foster the social transformation or keep the status quo.

[The model of clinical assistance and possibilities of doing it in a different way].

Nursing, in a clinical assistential model, and the daily practices in an in-patient psychiatric unit, are approached. It seems to have a discordance between the health system and clients problems. The nurses seem to plan actions that accomplish institutional goals instead of reaching out for clients' individual needs.

[Sensitizing nurses towards personalized care while nursing HIV-positive and AIDS patients].

The paper describes the author's experience on guiding "health workshops" as a way to sensitize nurses that take care of HIV-positive and AIDS patients through the development of humanized attention to their customers, according to Jean Watson's Trans-personal Care Theory. To do so, as a starting point we used the professionals reasoning throughout their career to highlight the importance of this approach.

[Experiencing the integration between nursing teachers and nurses. A research project].

This article reports the integration experience between registered nurses and nurse educators in a teaching hospital. The study is a research with focus on the care significance to adult clients in a outpatient unit.