Ligas de alta entropia são materiais formados por pelo menos cinco elementos metálicos em proporções de composição semelhante para cada metal. A alta entropia de configuração desses materiais é responsável por estabilizar soluções sólidas uniformes e desordenadas. Para esses materiais, a variedade de composição é imensa, com explosão combinatória com o aumento de elementos químicos diferentes na liga. Para explorar o espaço de configurações desses materiais, algoritmos de aprendizagem de máquina devem ser aplicados para...

Considering the reduction on basic interest rate in Brazil, the bonus payments obtained through “caderneta de poupança” (a popular and traditional brazilian special type of account which total value is correct by inflantion index and standard low taxes, basically), which is the most used investment in the country, hade been becoming deficitary. This fact has led to a growth in the number of individuals investing in the stock market looking for more attractive profitability. The...

Halide perovskites are promising semiconductor materials for a wide range of applications in optoelectronics. Perovskites have been used to design solar cells, light-emitting diodes, photodetectors, and lasers. However, the instability of perovskite organometallic halide has been described as the biggest challenge to its potential applications for energy harvesting. Recent developments demonstrated the use of graphene for perovskite solar cells as a transparent (and flexible) conductive electrode, a carrier transporting material, and a stabilizer material. The...