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Competitiveness and industrial evolution: the case of ceramics industry
Pereira, Elisabeth T.; Fernandes, António J.; Diz, Henrique M. M.This paper analyses the contribution made by evolutionary processes to the organisation of economic activity which is designed to create and sustain a competitive advantage, and to the competitiveness of companies in a dynamic and changing environment. The study looks at the ceramics industry sector in the Portuguese district of Aveiro, taking this as an example of change on the basis of empirical analyses of c...
Graphene nanoribbons from carbon nanotubes
Cunha, Eunice Paula Freitas; Paiva, M. C.; Proença, M. Fernanda R. P.; Melle-Franco, M.; Costa, Florinda; Fernandes, António J.; Torres, VítorChemical functionalization of the outer graphene layer of carbon nanotubes (CNT) has been increasingly studied, aiming at the application of CNT in different areas. The functionalization of CNT using the 1,3-dipolar cycloaddition reaction, leading to the formation of cyclic amine groups on the CNT surface [1], was observed to induce the unzipping of the CNT under specific conditions. The CNTs thus functionalize...
Formation of graphene nanoribbons in solution
Paiva, M. C.; Cunha, Eunice Paula Freitas; Proença, M. Fernanda R. P.; Araújo, Rui Filipe; Costa, Florinda; Fernandes, António J.; Ferro, Marta A.Recently, the formation of graphene by exfoliation of carbon nanotubes (CNT) has shown increasing interest. This process originates graphene nanoribbons (GNR) that are expected to present excellent electrical properties, depending on their width and on their edge shape [1]. Several methods for the unzipping of graphene from CNT were proposed along the past few years [2-6]. These methods often present some limit...
Production of graphene in solution by unzipping of carbon nanotubes
Cunha, E. M.; Oliveira, Elisabete; Paiva, M. C.; Costa, Florinda; Fernandes, António J.Chemical modification of the outer graphene layer of carbon nanotubes is an approach increasingly used, mainly to overcome the problem of interfacial bonding with different materials. The effect of functionalization of CNT under different conditions, using the 1,3-dipolar cycloaddition reaction [1], was studied by Scanning Tunneling Microscopy (STM). STM demonstrated the potential for unzipping of the outer gra...
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