Publications by authors named "L J Menezes"
As reported during the last five years, SnSe is one of the leading thermoelectric (TE) materials with a very low lattice thermal conductivity. However, its elements are not as heavy as those of classical thermoelectric materials like PbTe or BiTe. Its outstanding TE properties were revealed after repeated purification steps to minimize the amount of oxygen contamination, followed by spark plasma sintering.
View Article and Find Full Text PDFBackground: Cirrhosis has been pointed out as a clinical entity that leads to worse clinical prognosis in COVID-19 patients. However, this concept is controversial in the literature. We aimed to evaluate clinical outcomes by comparing patients with cirrhosis to those without cirrhosis in a Brazilian cohort.
View Article and Find Full Text PDFObjectives: To identify and map the literature on the current state of pH-triggered strategies for resin-based materials used in direct restorative dentistry, focusing on innovative compounds, their incorporation and evaluation methods, and the main outcomes.
Data And Sources: Through a search across PubMed, Scopus, Embase, Web of Science, LILACS, Cochrane Library databases, and Google Scholar, this review identified studies pertinent to pH-responsive dental materials, excluding resin-modified glass ionomer cements.
Study Selection: From the 981 records identified, 19 in vitro studies were included, concentrating on resin-based composite resins (50 %), dentin adhesives (25 %), and sealants (25 %).
Article Synopsis
- Dielectric metasurfaces with quasi-bound states in the continuum (qBICs) can boost field enhancement through narrow resonances in the visible and near-infrared ranges.
- A new silicon-on-silica metasurface design supports up to four qBIC resonances by using an elliptical cylinder array with varied symmetry-breaking shapes.
- The study showcases the nonlinear process of four-wave mixing and highlights the potential applications in areas like information multiplexing and multi-wavelength sensing using the unique geometric control of qBICs.
Article Synopsis
- Active metasurfaces enable advanced light manipulation for applications like displays, holograms, and sensors, but previous designs have struggled to meet all key performance metrics required for practical use.
- The newly developed active Huygens' metasurface, made from conductive polyaniline (PANI), notably improves performance with a switching speed of 60 fps, over 2000 cycles of durability, and high modulation contrast exceeding 1400%.
- This PANI-based design offers efficient electrical control and can be integrated into other systems, moving us closer to reliable and compact optical devices for future technologies.