Commentary on Foreign Reprints Act 1847

Legislation enabling colonial territories to import unauthorised foreign reprints subject to the payment of an import duty, to be collected for the benefit of British publishers.
The commentary explores the background to the Foreign Reprints Act 1847, and in particular, the differences between the British and colonial markets for literary works, and the introduction of 'responsible government' in the colonies. It also considers the movement in the late 1860s and early 1870s, on the part of the British book trade, to have the legislation repealed, as well as the efforts of the Canadian legislature to replace the import scheme with a system of compulsory licensing, set against the backdrop of increasingly fractious Anglo-Canadian copyright relations. The Canadian demands for compulsory licensing scheme were by and large abandoned, and the 1847 Act remained on the statute books until the passing of the Copyright Act 1911.

Toward controlled growth of helicity-specific carbon nanotubes

The underlying mechanisms for the nucleation of carbon nanotubes as well as their helicity, remain elusive. Here, using van der Waals dispersion force calculations implemented within density functional theory, we study the cap formation, believed to be responsible for the chirality of surface-catalyzed carbon nanotubes. We find the energetics associated with growth along different facets to be independent of the surface orientation and that the growth across an edge along the axis of the metal particle leads to a perfect honeycomb lattice in a curved geometry. The formation of defects in the graphene matrix, which bend the carbon plane, requires that two or more graphene embryos with significantly different growth axis merge. Such scenario is only possible at the front- or back-end of the metal particle where growth symmetry is broken. The graphene embryos reconstruct their hexagonal structure into pentagons, heptagons, and octagons counterpart to accommodate the tube curvature.