Anodic oxidation of InP in KOH electrolytes

The anodic behavior of InP in 1 mol dm-3 KOH was investigated and compared with its behavior at higher concentrations of KOH. At concentrations of 2 mol dm-3 KOH or greater, selective etching of InP occurs leading to thick porous InP layers near the surface of the sustrate. In contrast, in 1 mol dm-3 KOH, no such porous layers are formed but a thin surface film is formed at potentials in the range 0.6 V to 1.3 V. The thickness of this film was determined by spectroscopic ellipsometry as a function of the upper potential and the measured film thickness corresponds to the charge passed up to a potential of 1.0 V. Anodization to potentials above 1.5 V in 1 mol dm- 3 KOH results in the growth of thick, porous oxide films (~ 1.2 µm). These films are observed to crack, ex-situ, due to shrinkage after drying in ambient air. Comparisons between the charge density and film thickness measurements indicate a porosity of approximately 77% for such films.

Diversity, difference and nation: indigenous peoples on screen in Mexico

This paper draws on constructivist theories of identity that regard the self as, paradoxically, coming into existence through interaction with the other, to investigate the discursive formation of indigenous people in the forging of Mexican national identity. The aim of the essay is to show how difference has been managed and deployed in the establishment of national Mexican identities from independence until the present. This is done with reference to visual culture and film and illustrated with examples from the ‘Golden Age’ as well as ‘the New Mexican Cinema’.

Law, poetry and medicine: the literate professionals in autonomous Gaelic Ireland, c.1250 - c.1630

This thesis is about a class of literate professionals that served as hereditary brehons, poets and doctors to the Gaelic aristocracy over a period from c.1250-c.1630. My investigation into these families brings together evidence from Gaelic and English sources to highlight the work these families did for their patrons, their status in society and their subsequent fall in the seventeenth century. Such a broad canvas allows us to observe the vibrancy of Gaelic literary culture as these families adapted to the changing political landscape to absorb new Anglo-Norman patrons and assimilated English and Continental ideas while maintaining their distinctive identity. I want to look beyond the ideology espoused by these families to look at the practical choices members of these families made to maintain their status and relevance in a changing social context. To do this I have chosen to focus on each of the three professions in individual chapters to highlight the continuities and changes within the professions and ultimately by comparing the three groups to gauge the success or failure of these professional families to adapt to the encroachment of the New English and the ultimate collapse of the Gaelic world. This thesis takes a holistic approach to these families by including branches of these families not engaged in the hereditary profession. It seeks to provide a broader picture of Gaelic society below the level of the aristocracy by looking at the geographic distribution of these families, their proximity to centres of power, and to land and sea routes that can indicate their involvement in alternative economic activities.