3 documents found, page 1 of 1
The role of hydrogen incorporation into amorphous carbon films in the change of...
Bundaleski, Nenad; Adame, Carolina F.; Alves, Eduardo; Barradas, Nuno P.; Cerqueira, M. F.; Deuermeier, Jonas; Delaup, Yorick; Ferraria, Ana M.Over the last few years, there has been increasing interest in the use of amorphous carbon thin films with low secondary electron yield (SEY) to mitigate electron multipacting in particle accelerators and RF devices. Previous works found that the SEY increases with the amount of incorporated hydrogen and correlates with the Tauc gap. In this work, we analyse films produced by magnetron sputtering with different...
Sisal-derived acid-char molybdenum catalyst for reductive deoxygenation of sulf...
Duarte, Tiago A. G.; Mestre, Ana S.; Ferreira, Maria J. G.; Rego, Ana M. Botelho do; Ferraria, Ana M.; Kirillova, Marina V.; Carvalho, Ana P.The deoxygenation of sulfoxides is a rather important reaction from both synthetic and biological points of view, due to the potential of sulfides as intermediates in a variety of processes. Homogenous Mo-based catalysts successfully perform the reduction of diphenyl sulfoxide to diphenyl sulfide with high yields but present the well-known limitations regarding recovery and recycling. Thus, in the present work,...
Studies on PLA grafting onto graphene oxide and its effect on the ensuing compo...
Campos, Joao M.; Ferraria, Ana M.; Botelho do Rego, Ana M.; Rosario Ribeiro, M.; Barros-Timmons, AnaPolylactide (PLA) with a terminal triple bond was synthesized by organocatalyzed ring-opening polymerization and coupled with azide-functionalized graphene oxide (GO) through an azide-alkyne cycloaddition \"click\" reaction. The functionalized graphenic species involved were analyzed by spectroscopic techniques (FT-IR, solid state C-13 NMR, Raman), which confirmed the coupling of PLA and GO. Additionally, an in...