7 documents found, page 1 of 1
Sustainable Materials Applied To Flexible Electronics Using A Laser-Induced Mod...
Silvestre, SaraWearable electronics and miniaturized devices have become integral to modern life. The next step is scaling these innovations for larger systems while maintaining efficiency, flexibility, and energy performance, especially as smart cities expand and demand eco-friendly solutions to reduce electronic waste and environmental impact. This thesis bridges advanced electronics and sustainability by using renewable ma...
Laser-induced graphene on paper toward efficient fabrication of flexible, plana...
Pinheiro, Tomás; Silvestre, Sara; Coelho, João; Marques, Ana C.; Martins, Rodrigo; Sales, M. Goreti F.; Fortunato, ElviraAbstract Laser irradiation to induce networks of graphene-based structures toward cost-effective, flexible device fabrication is a highly pursued area, with applications in various polymeric substrates. This work reports the application of this approach toward commonly available, eco-friendly, low-cost substrates, namely, chromatographic and office papers. Through an appropriate chemical treatment with sodium t...
Hydrophobic modification of bacterial cellulose using oxygen plasma treatment a...
Leal, S.; Cristelo, C.; Silvestre, Sara; Fortunato, Elvira; Sousa, Aureliana; Alves, A.; Correia, Daniela Maria Silva; Lanceros-Méndez, S.; Gama, F. M.A new strategy for the surface modification of bacterial cellulose (BC) through the combination of oxygen plasma deposition and silanization with trichloromethyl silane (TCMS) is described. The combined use of the two techniques modifies both the surface roughness and energy and therefore maximizes the obtained hydrophobic effect. These modified membranes were characterized by Scanning Electron Microscopy (SEM)...
Bacterial cellulose-based microfluidic device for 3D skin modelling (skin-on-chip)
Gama, F. M.; Fortunato, Elvira; Sousa, Aureliana; Marques, Carolina; Leal, Ana Salomé Barbosa; Silvestre, Sara; Cristelo, Cecília SilvaPaper fluidics is based on patterning hydrophilic paper with channels bounded by hydrophobic barriers. Fluids move along channels by capillarity. Several methods are available for patterning paper, with different costs/resolutions. Paper patterning for microfluidics also used the embossing technique to design open-channel microfluidic devices, fabricated by compressing the sheet of paper with the help of 3D pla...
Alcohol and Youth in Portugal: An Intervention Through the Triangle Project
Ribeiro, Sofia; Silvestre, SaraKeywords: Adolescent; Alcohol Drinking; Portugal.; Palavras-chave: Adolescente; Consumo de Bebidas Alcoólicas;Portugal.
Adsorção de mercúrio em fibras de carbono activadas
Valente Nabais, Joao; Silvestre, Sara; Carrott, Peter; Carrott, ManuelaAdsorção de mercúrio em fibras de carbono activadas. Neste trabalho é mostrada a preparação de fibras de acrbono activadas com e sem modificações para adorver mercurio de soluções aquosas.
Adsorption of Aqueous Mercury(II)Species by Commercial Activated Carbon Fibres ...
Nabais, Joao; Carrott, Peter; Ribeiro Carrott, Manuela; Silvestre, Sara; Duran-Valle, CarlosThe adsorption of HgCl2, [HgCl4]2– and Hg2+ onto a series of activated carbon fibres was studied. These included the as-received commercial activated carbon fibre (K), that obtained after modification via by sulphuric acid oxidation (KAC) and that obtained after modification by reaction with pentaethylenehexamine (KBAS). The effects of concentration (10–1500 mg/l), solution pH (1–10) and temperature (25°C, 35°C...