Photoinduced phase separation, which limits the available band gap energies for photovoltaic applications, was reported for a range of mixed-halide perovskites. A microscopic understanding of the phase separation mechanism is still lacking but may be beneficial to rationalize limitations as well as enable the design of phase-stable perovskite semiconductors. In this letter, electron-beam-induced p

In this work, we present a detailed investigation of the optical properties of hybrid perovskite building blocks, [PbI2+n]n−, that form in solutions of CH3NH3PbI3 and PbI2. The absorbance, photoluminescence (PL) and photoluminescence excitation (PLE) spectra of CH3NH3PbI3 and PbI2 solutions were measured in various solvents and a broad concentration range. Both CH3NH3PbI3 and PbI2 solutions exhibi

Metal halide perovskites (MHP), as used in photovoltaic (PV) applications, show a rich photophysics in inert and ambient atmosphere. The presence of atmospheric molecules leads to processes that enhance as well as reduce their photoluminescence (PL) emission. Various phenomena are previously described for a wide variety of gas molecules and different classes of MHP, with a particular interest on t

We studied the seasonal fluctuation of norovirus and other enteric viruses in Cameroon. Two hundred participants aged between 1 and 69 years were prospectively followed up. Each participant provided monthly faecal samples over a 12-month period. A total of 2484 samples were tested using multiplex real-time PCR assay for the detection of norovirus, rotavirus and enterovirus. The effect of weather v

In this work, we rationalize the chemical pathways and kinetics of the crystallization of methylammonium lead iodide hybrid perovskite. Our approach includes a combination of analysis of solvent coordination, the structure of intermediate solvate phases, and modeling evaporation rates of precursor solutions. The evolution of solution species via intermediate solvate phases and into perovskite thinIn this work, we rationalize the chemical pathways and kinetics of the crystallization of methylammonium lead iodide hybrid perovskite. Our approach includes a combination of analysis of solvent coordination, the structure of intermediate solvate phases, and modeling evaporation rates of precursor solutions. The evolution of solution species via intermediate solvate phases and into perovskite thin

A combination of theoretical predictions and isotopic equilibration experiments using the three-isotope method have been performed to assess Si isotope fractionation among minerals, and aqueous species in the presence of dissolved catechol. Aqueous Si in abiotic ambient temperature aqueous solutions is dominated by the IV-coordinated H4SiO04species, but the presence of aqueous catechol provokes th

Glas är ett genomsiktligt material som används i byggnader för att utforma miljöer som är ljusa och upplevs som öppna. Modernt byggnadsglas används i konstruktioner som utsätts för betydande laster jämfört med ett traditionellt fönsterglas. Som exempel kan nämnas trappsteg, balustrader, golv, tak och väggpaneler där glasets geometriska utformning kan vara mer eller mindre komplex. Det finns ett beNovel and increased use of glass in building construction has been made possible, as a result of methods of mass production introduced during the 20th century and advanced computational structural analyses. With modern use of glass structures, a range of demands emerge which need to be addressed in the strength design process. The aim of the thesis work has been to develop experimentally verified

Degradation of extracellular matrix, is a prerequisite for processes like tumor invasion and angiogenesis. Numerous studies indicate that plasminogen activation, initiated by u-PA, is a key process in malignant tumor growth. The expression of u-PA as well as its receptor is increased in malignant ovarian tumors. Additionally, u-PA stimulates signal transduction leading to cell proliferation and mi

15 filmade samtal mellan lärarstuderande, handledare och besökande vfu-lärare

Oxidative stress is defined as an imbalance between oxidants and antioxidants. The reasons behind the condition are diverse, and can result in, or contribute to, the severity of many diseases. The body has different protective mechanisms to reduce the oxidative burden, among them a protein called α1-microglobulin (A1M). A1M possesses a unique set of molecular properties enabling it to act as aradi

Multiple missiles were fired at Erbil on February 15, killing at least one civil contractor and injuring at least one American national. It is likely that the attack was conducted by an Iranian proxy in order to put pressure on President Biden to lift the sanctions against the country and return to the 2015 nuclear deal.

A number of virtual reality head-mounted displays (HMDs) with integrated eye trackers have recently become commercially available. If their eye tracking latency is low and reliable enough for gaze-contingent rendering, this may open up many interesting opportunities for researchers. We measured eye tracking latencies for the Fove-0, the Varjo VR-1, and the High Tech Computer Corporation (HTC) Vive

Transfusion-related acute lung injury (TRALI) is a hazardous transfusion complication with an associated mortality of 5% to 15%. We previously showed that stored (5 days) but not fresh platelets (1 day) cause TRALI via ceramide-mediated endothelial barrier dysfunction. As biological ceramides are hydrophobic, extracellular vesicles (EVs) may be required to shuttle these sphingolipids from platelet