Publications by authors named "W HEISS"
Reliable fabrication of large-area perovskite films with antisolvent-free printing techniques requires high-volatility solvents, such as 2-methoxyethanol (2ME), to formulate precursor inks. However, the fabrication of high-quality cesium-formamidinium (Cs-FA) perovskites has been hampered using volatile solvents due to their poor coordination with the perovskite precursors. Here, this issue is resolved by re-formulating a 2ME-based CsFAPbI ink using pre-synthesized single crystals as the precursor instead of the conventional mixture of raw powders.
View Article and Find Full Text PDFArticle Synopsis
- Aliovalent-doped metal oxide nanocrystals with localized surface plasmons (LSPRs) are essential for applications requiring specific optical properties, particularly between infrared and visible light transparency.
- Indium tin oxide (ITO), while dominant in this area, is limited by scarce indium resources, leading researchers to explore antimony-doped tin oxide (ATO) as a cost-effective alternative, despite its less favorable electronic characteristics and challenges in controlling LSPRs.
- This study presents a method to synthesize plasmonic ATO nanocrystals using a solvothermal approach, demonstrating that ligand exchange can effectively tune LSPR energies and enhance doping efficiency beyond traditional methods, opening doors for various applications like infrared upconversion and thermal management.
Article Synopsis
- The NORTHSTAR-CA study investigates the effects of 1-Hz rTMS combined with speech-language therapy on naming recovery in both subacute and chronic post-stroke aphasia patients, aiming to compare their effectiveness.
- A total of 67 patients participated, receiving either rTMS or sham stimulation for 10 days, with significant improvements in language outcomes observed across groups; however, only subacute patients showed notable gains in naming recovery from rTMS.
- The findings suggest that rTMS enhances language recovery in the subacute phase post-stroke, highlighting a critical window for intervention, although further research is needed to confirm these results in a larger cohort.
Article Synopsis
- The study aims to document Cerebrolysin treatment and related medications in patients with significant neurological deficits after ischemic stroke to evaluate their effects on rehabilitation outcomes at two time points (day 21 and day 90).
- An open observational design based on high-quality comparative effectiveness research (HQCER) is employed to reflect real-world clinical practices and enhance result validity.
- The study emphasizes the benefits of real-world studies, which can include larger participant numbers and greater statistical reliability compared to traditional study designs.
Article Synopsis
- Low-dimensional semiconductors have significant applications in optoelectronics, but their absorption strength compared to bulk semiconductors hasn't been quantitatively compared.
- Researchers used atomistic tight-binding calculations to show that the absorptance of semiconductor quantum wells is consistent with a value defined by the fine-structure constant, corroborating experimental data.
- The study leads to the conclusion that the absorptance quantum, which is consistent across different dimensionalities, governs the band-edge absorption of all direct semiconductors, demonstrated through experimental findings in both quantum dots and bulk materials.