Optoelectronic Properties of Cold Plasma-Deposited, Oxidized Sn-C Thin Films.

We report on investigating the structural and electronic properties of semiconducting and insulating layers produced in a process resembling percolation in a unique cold plasma fabrication method (plasma-enhanced chemical vapor deposition-PECVD). Amorphous carbon-tin films (Sn-C) produced from tetramethyl tin (TMT) with an acoustic-frequency glow discharge in a three-electrode reactor were investigated. The layers, after air exposure, oxidized to SnO2/Sn-C. Depending on the coupling capacitance applied to the plasma reactor, the films could be obtained in the form of an amorphous semiconductor or an amorphous insulator. We assume that the semiconductor consists of an internal network of channels auto-organized during deposition. The insulator does not demonstrate any internal structure features. An investigation on conductive filaments creating low-dimensional (LD) nanojunctions in the semiconductor and the location of energetic levels in the insulator was performed. The main parameters of the electronic band structure of the insulating film, such as the transport gap EG (5.2 eV), optical gap Eopt (3.1 eV), electron affinity Χ (2.1 eV), and ionization potential J (7.3 eV), were determined. We have demonstrated a simple approach for developing a catalyst candidate consisting of amorphous semiconductor-insulator nanojunctions for (photo)catalytic hydrogen evolution or CO2 reduction.

Selective Growth of van der Waals Heterostructures Enabled by Electron-Beam Irradiation.

Van der Waals heterostructures (vdWHSs) enable the fabrication of complex electronic devices based on two-dimensional (2D) materials. Ideally, these vdWHSs should be fabricated in a scalable and repeatable way and only in the specific areas of the substrate to lower the number of technological operations inducing defects and impurities. Here, we present a method of selective fabrication of vdWHSs via chemical vapor deposition by electron-beam (EB) irradiation. We distinguish two growth modes: positive (2D materials nucleate on the irradiated regions) on graphene and tungsten disulfide (WS2) substrates, and negative (2D materials do not nucleate on the irradiated regions) on the graphene substrate. The growth mode is controlled by limiting the air exposure of the irradiated substrate and the time between irradiation and growth. We conducted Raman mapping, Kelvin-probe force microscopy, X-ray photoelectron spectroscopy, and density-functional theory modeling studies to investigate the selective growth mechanism. We conclude that the selective growth is explained by the competition of three effects: EB-induced defects, adsorption of carbon species, and electrostatic interaction. The method here is a critical step toward the industry-scale fabrication of 2D-materials-based devices.

Long-term outcomes of the Coordinated Care Program in Patients after Myocardial Infarction (KOS-MI).

BACKGROUND: The Coordinated Care in Myocardial Infarction Program (KOS-MI) was introduced to improve prognosis for patients after myocardial infarction (MI). The program includes complete revascularization followed by unrestricted access to rehabilitation, electrotherapy and cardiac care. AIM: The aim of this study was to assess major adverse cardiac and cerebrovascular events (MACCE) of patients enrolled in the KOS-MI at 3-year follow-up. METHODS: This is a retrospective, multicenter registry of patients treated for MI. Study group (KOS-MI) of 963 patients was compared to the control group (standard of care) of 1009 patients. At 3-year follow-up MACCE including death, MI, stroke and repeated revascularization were reported. Additionally, hospitalization due to heart failure (HF) was analyzed. Propensity score matching (PSM) was utilized for group baseline characteristics adjustment. RESULTS: Patients in the KOS-MI group were younger (65 vs. 68; P < 0.001), mostly men (70% vs. 62.9%; P < 0.001), admitted with ST-elevation myocardial infarction (STEMI) (44.6% vs. 36.2%; P < 0.001). Patients in the control group had more comorbidities and were admitted more often with non ST-elevation myocardial infarction (63.8% vs. 55.4%; P < 0.001) and acute HF (5.1% vs. 2.7%; P = 0.007). Following PSM 530 well matched pairs were selected. At three years (92.3% follow-up completeness), the relative risk reduction was: 25% in MACCE (P = 0.008), 38% in mortality (P = 0.008), 29% in repeated revascularization(P = 0.04) and 28% (P = 0.0496) in hospitalization for HF in the KOS-MI group. CONCLUSIONS: The combination of contemporary invasive techniques, complete revascularization, cardiac rehabilitation and ambulatory care included in the KOS-MI Program improves long-term prognosis of patients after MI up to 3-year follow-up.

Analysis of the feelings of patients with HIV/AIDS and HCV in contact with health professionals. Assessment based on cases of stigmatisation and discrimination. / Analiza odczuc pacjentów z HIV/AIDS i HCV w kontakcie z przedstawicielami zawodów medycznych. Ocena w oparciu o przypadki stygmatyzacji i dyskryminacji.

OBJECTIVES: This study aimed to investigate incidences of stigmatisation and discrimination by selected health professionals against patients with HIV/AIDS and HCV, and to assess how these affected feelings in both groups. METHODS: The study involved 160 patients - 80 diagnosed with HIV/AIDS in the baseline group and 80 with HCV in the comparison group. Patients were recruited from among patients treated in two outpatient clinics of the University Hospital in Krakow. RESULTS: Incidents of stigmatisation and discrimination were observed significantly more often in the HIV/AIDS group compared to the HCV group. According to the patients, incidents of stigmatisation and discrimination on the part of medical staff occur due to fear and a sense of threat from infection with the viruses. The experience of stigmatisation and discrimination by patients manifests itself in the impediment or denial of healthcare services by medical professionals. Some of the medical staff blamed the patients for the infection, expressed disrespect and verbal aggression towards them, and treated them worse when they found out about the infection. Their emotional state depended on the nature of the relationship with the medical staff triggered by stigmatisation and discrimination. CONCLUSIONS: Stigmatisation and discrimination by medical staff against patients were, according to the respondents, linked to fear of infection but confirmation of this relationship would require further research. In the course of these cases, patients experienced pejorative verbal evaluation, impediment or denial of health services, which could have specific health consequences. These types of attitudes had a negative impact on their emotional state.

Two-Dimensional Crystals as a Buffer Layer for High Work Function Applications: The Case of Monolayer MoO3.

We propose that the crystallinity of two-dimensional (2D) materials is a crucial factor for achieving highly effective work function (WF) modification. A crystalline 2D MoO3 monolayer enhances substrate WF up to 6.4 eV for thicknesses as low as 0.7 nm. Such a high WF makes 2D MoO3 a great candidate for tuning properties of anode materials and for the future design of organic electronic devices, where accurate evaluation of the WF is crucial. We provide a detailed investigation of WF of 2D α-MoO3 directly grown on highly ordered pyrolytic graphite, by means of Kelvin probe force microscopy (KPFM) and ultraviolet photoemission spectroscopy (UPS). This study underlines the importance of a controlled environment and the resulting crystallinity to achieve high WF in MoO3. UPS is proved to be suitable for determining higher WF attributed to 2D islands on a substrate with lower WF, yet only in particular cases of sufficient coverage. KPFM remains a method of choice for nanoscale investigations, especially when conducted under ultrahigh vacuum conditions. Our experimental results are supported by density functional theory calculations of electrostatic potential, which indicate that oxygen vacancies result in anisotropy of WF at the sides of the MoO3 monolayer. These novel insights into the electronic properties of 2D-MoO3 are promising for the design of electronic devices with high WF monolayer films, preserving the transparency and flexibility of the systems.

Unraveling the Mechanism of the 150-Fold Photocurrent Enhancement in Plasma-Treated 2D TMDs.

Two-dimensional (2D) transition metal dichalcogenides (TMDs) are increasingly investigated for applications such as optoelectronic memories, artificial neurons, sensors, and others that require storing photogenerated signals for an extended period. In this work, we report an environment- and gate voltage-dependent photocurrent modulation method of TMD monolayer-based devices (WS2 and MoS2). To achieve this, we introduce structural defects using mild argon-oxygen plasma treatment. The treatment leads to an extraordinary over 150-fold enhancement of the photocurrent in vacuum along with an increase in the relaxation time. A significant environmental and electrostatic dependence of the photocurrent signal is observed. We claim that the effect is a combined result of atomic vacancy introduction and oxide formation, strengthened by optimal wavelength choice for the modified surface. We believe that this work contributes to paving the way for tunable 2D TMD optoelectronic applications.

Implementation of Mental Health Centres Pilots in Poland since 2018: A Chance to Move towards Community-Based Mental Health Services.

Provision of mental health care in Poland has long been characterised by an overreliance on psychiatric hospitals and the underdevelopment of community care. The introduction of the first National Mental Health Protection Programme for 2011-2015, with the explicit goal to base provision of mental care on the community mental health centres, failed to achieve any tangible results. The ensuing critique led to the launch of the second National Mental Health Protection Programme for 2017-2022 and the establishment, from mid-2018 onwards, of 41 (33 in operation) mental health centres across Poland. These will be piloted until the end of 2022 but have already shown positive results in terms of access to non-stationary care and a small fall in hospitalisations. They have also performed well during the COVID-19 pandemic, allowing for a quick reorganization of care and continued provision of mental health services. Some of the key innovations of the new model include the introduction of recovery assistants (a new profession) and mental health coordinators (a new role); liaison with social assistance services; and a shift to budget financing. The key obstacles to the national rollout of mental health centres are the low financing of mental health care in Poland, which is among the lowest in Europe, and acute workforce shortages.

Improved coordination of care after acute myocardial infarction in Poland since 2017: Promising early results.

A new model of complex patient care after acute myocardial infarction (AMI) has been in operation in Poland since late 2017, comprising invasive treatment, cardiac rehabilitation and scheduled outpatient follow-up. Its stated objectives are to improve secondary prevention measures, quality of care and long-term health outcomes in AMI-patients. The model implements all key aspects of post-MI care recommended by the European Society of Cardiology (ESC), representing the first nation-wide model of structured and comprehensive post-MI care that closely follows ESC guidelines. The aim of this paper is to describe the background of this reform, its content and implementation as well as to assess its results. Early outcomes seem promising, with significantly lower mortality rate and lower risk of serious cardiological events in patients participating in the new model of care compared to patients who were not included. A comprehensive assessment of the reform will require further clinical data, covering a larger population and a longer period of time, as well as a holistic analysis of the programme in its wider context, taking into account potential benefits and cost-effectiveness of improved primary prevention implemented outside of this model.

Surface-Bound and Volatile Mo Oxides Produced During Oxidation of Single MoS2 Crystals in Air and High Relative Humidity.

We report on the MoO3 oxides and their derivatives on microscopic 2H MoS2 flakes oxidized in air and high relative humidity at a moderate temperature range below 410 °C. We combine XPS and AFM measurements such as topography, friction, creation of nanoscale ripples and scratches on the MoS2 flakes deposited on Si substrates. We detect MoO3 oxides mostly by measuring selected nanomechanical properties of the MoO3 layer, such as its compressive mechanical stress at the plastic yield. We discuss basal surface coverage of the single MoS2 flakes by the MoO3 oxides. We discuss conditions for appearance of all possible MoO3 oxide derivatives, such as molybdenum(VI) hydroxyoxides and MoO3 hydrates. Our findings agree with an expected mechanistic switch in thermal oxidation in water vapors vs. air.

Institutional analysis of health promotion for older people in Europe - concept and research tool.

BACKGROUND: European societies are ageing rapidly and thus health promotion for older people (HP4OP) is becoming an increasingly relevant issue. Crucial here is not only the clinical aspect of health promotion but also its organisational and institutional dimension. The latter has been relatively neglected in research on HP4OP. This issue is addressed in this study, constituting a part of the EU project ProHealth65+, engaging ten member countries. This paper is based on two intertwining research goals: (1) exploring which institutions/organisations are performing HP4OP activities in selected European countries (including sectors involved, performed roles of these institutions, organisation of those activities); (2) developing an institutional approach to HP4OP. Thus, the paper provides a description of the analytical tools for further research in this area. METHODS: The mentioned aims were addressed through the mutual use of two complementary methods: (a) a literature review of scientific and grey literature; and (b) questionnaire survey with selected expert respondents from 10 European countries. The expert respondents, selected by the project's collaborating partners, were asked to fill in a custom designed questionnaire concerning HP4OP institutional aspects. RESULTS: The literature review provided an overview of the organisational arrangements in different HP4OP initiatives. It also enabled the development of functional institutional definitions of health promotion, health promotion activities and interventions, as well as an institutional definition adequate to the health promotion context. The distinctions between sectors were also clarified. The elaborated questionnaires provided in-depth information on countries specifically indicating the key sectors involved in HP4OP in those selected countries. These are: health care, regional/local authorities, NGO's/voluntary institutions. The questionnaire and literature review both resulted in the indication of a significant level of cross-sectorial cooperation in HP4OP. CONCLUSIONS: The inclusion of the institutional analysis within the study of HP4OP provides a valuable opportunity to analyse, in a systematic way, good practices in this respect, also in terms of institutional arrangements. A failure to address this aspect in policymaking might potentially cause organisational failure even in evidence-based programmes. This paper frames the perception of this problem.

[History and the development of the studies on HIV and AIDS]. / Historia i rozwój badan nad HIV i AIDS.

The article describes the progress of medical knowledge which has been observed since the finding and discovery of the first case of the immune deficiency syndrome in the world in 1981. During this period the methods of diagnosis and treatment of HIV/AIDS has changed significantly. The progress in this area of examinations which is presently achieved allows unambiguous diagnosis of the virus and the disease. The recognition of the pathogenesis of the HIV and AIDS enabled the beginning of the studies on the medicines having antiretroviral properties. The utilization of the potential of the currently used medicines inhibits the progress of the disease and, in consequence, the elongation of the patients' life span. However, despite excessive clinical experiments in numerous research centres world-wide, until now there has not been found an effective medicine which could totally eradicate this virus from the body nor the vaccine which could prevent the further spread of this virus in the world.