16 documents found, page 1 of 2
Towards rapid and low-cost stroke detection Using SERS and Machine Learning
Freitas, Cristina; Eleutério, João; Soares, Gabriela; Enea, Maria; Nunes, Daniela; Fortunato, Elvira; Martins, Rodrigo; Águas, Hugo; Pereira, EuláliaStroke affects approximately 12 million individuals annually, necessitating swift diagnosis to avert fatal outcomes. Current hospital imaging protocols often delay treatment, underscoring the need for portable diagnostic solutions. We have investigated silver nanostars (AgNS) incubated with human plasma, deposited on a simple aluminum foil substrate, and utilizing Surface-Enhanced Raman Spectroscopy (SERS) comb...
Correction
Boane, Jenny; Panigrahi, Shrabani; Calmeiro, Tomás; Coimbra, Edgar; Santos, Ivan M.; Fortunato, Elvira; Martins, Rodrigo; Mendes, Manuel J.; Águas, HugoCorrection for ‘Unveiling the nanoscale photocurrent behavior in perovskite films on photonic-structured TiO2’ by Jenny Boane et al., New J. Chem., 2025, 49, 16226–16234, https://doi.org/10.1039/D5NJ02813B.
Green exfoliation of 2D nanomaterials using cyrene as a solvent
Moreira, Pedro; Mendes, João; Calmeiro, Tomás; Nunes, Daniela; Carvalho, David; Kelly, Adam; Águas, Hugo; Fortunato, Elvira; Martins, RodrigoLiquid-phase exfoliation (LPE) is a versatile and scalable method for producing high-quality two-dimensional materials (2DMs). However, commonly used solvents such as dimethylformamide (DMF) or N-methyl-2-pyrrolidone (NMP) are highly toxic, limiting their potential for large-scale industrial applications. In this study, we address this challenge using Cyrene (dihydrolevoglucosenone), a nontoxic and biodegradabl...
Optimization of the crystalline silicon surface by chemical treatment and hydro...
Candeias, Maria B.; Abbas, Ghulam; Zamchiy, Alexandr; Martins, Rodrigo; Mendes, Manuel J.; Águas, Hugo; Pereira, Rui N.; Leitão, Joaquim P.Interfacial defects significantly impact the performance of optoelectronic devices by influencing charge carrier recombination. This work focuses on optimizing the chemical cleaning of crystalline silicon (c-Si) substrates and the passivation of surface defects with an ultrathin layer of hydrogenated amorphous silicon (a-Si:H). The study measured low-temperature photoluminescence originating mainly from c-Si as...
Sub-Bandgap Sensitization of Perovskite Semiconductors via Colloidal Quantum Do...
Ribeiro, Guilherme; Ferreira, G.; Menda, U.D.; Alexandre, Miguel; Brites, Maria João; Barreiros, M. Alexandra; Jana, S.; Águas, Hugo; Martins, RodrigoABSTRACT: By taking advantage of the outstanding intrinsic optoelectronic properties of perovskite-based photovoltaic materials, together with the strong near-infrared (NIR) absorption and electronic confinement in PbS quantum dots (QDs), sub-bandgap photocurrent generation is possible, opening the way for solar cell efficiencies surpassing the classical limits. The present study shows an effective methodology ...
Sub-Bandgap Sensitization of Perovskite Semiconductors via Colloidal Quantum Do...
Ribeiro, Guilherme; Ferreira, G.; Menda, U.D.; Alexandre, Miguel; Brites, Maria João; Barreiros, M. Alexandra; Jana, S.; Águas, Hugo; Martins, RodrigoABSTRACT: By taking advantage of the outstanding intrinsic optoelectronic properties of perovskite-based photovoltaic materials, together with the strong near-infrared (NIR) absorption and electronic confinement in PbS quantum dots (QDs), sub-bandgap photocurrent generation is possible, opening the way for solar cell efficiencies surpassing the classical limits. The present study shows an effective methodology ...
Bedding mortars from medieval ceramic flooring from the Alcobaça Monastery in P...
Carvalho, Fernanda; Nunes, A.; Pagará, A.; Costeira, I.; Silva, Teresa; Leal, Nuno; Simão, J.; Galhano, Carlos; Águas, Hugo; Lima, M.M.R.A.; Veiga, JPABSTRACT: Bedding mortars are fundamental materials to ensure the stability of titles, especially in the case of flooring which withstand the impact of people circulation. In a church, the quality of mortars, tiles pieces and their maintenance over time can be decisive for pavement durability. Inside the church of Santa Maria de Alcobaça Monastery, stone slabs are currently the main and the most applied type of...
Copper-Arsenic-Sulfide Thin-Films from Local Raw Materials Deposited via RF Co-...
Centeno, Pedro; Alexandre, Miguel; Neves, Filipe; Fortunato, Elvira; Martins, Rodrigo; Águas, Hugo; Mendes, Manuel JoaoABSTRACT: he inexorable increase of energy demand and the efficiency bottleneck of monocrystalline silicon solar cell technology is promoting the research and development of alternative photovoltaic materials. Copper-arsenic-sulfide (CAS) compounds are still rather unexplored in the literature, yet they have been regarded as promising candidates for use as p-type absorber in solar cells, owing to their broad ra...
Copper-Arsenic-Sulfide Thin-Films from Local Raw Materials Deposited via RF Co-...
Centeno, Pedro; Alexandre, Miguel; Neves, Filipe; Fortunato, Elvira; Martins, Rodrigo; Águas, Hugo; Mendes, Manuel JoaoABSTRACT: he inexorable increase of energy demand and the efficiency bottleneck of monocrystalline silicon solar cell technology is promoting the research and development of alternative photovoltaic materials. Copper-arsenic-sulfide (CAS) compounds are still rather unexplored in the literature, yet they have been regarded as promising candidates for use as p-type absorber in solar cells, owing to their broad ra...
LocalEnergy: Local Resources for Multifunctional Tetrahedrite-based Energy: Har...
Neves, Filipe; Correia, J.B.; Esperto, Luís; Mascarenhas, João; Figueira, Isabel; de Oliveira, Daniel Pipa Soares; Salgueiro, Rute; Silva, Teresa