15 research outputs found

    Trinity Walton Club: What is its potential for promoting interest in STEM?

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    Concerns are growing in many countries, including Ireland, regarding an inadequate number of graduates to meet workforce needs in science, technology, engineering and mathematics (STEM) fields. These graduate deficiencies are the result of low student uptake of STEM subjects and courses at post-primary and tertiary level education. Low uptake is partly a consequence of negative student attitudes towards STEM. Many students are losing interest in STEM at an early age due to an inability to see any relevance in their everyday lives. In light of such concerns, a Saturday afternoon club entitled “Trinity Walton Club” (TWC) was established in Trinity College Dublin with the purpose of uniting like-minded students to express, shape, inform and grow their interest in STEM. This club attempted to ‘bring STEM to life’ through thought provoking content, real world problems, contextualised analogies and projects. This paper describes the background to the TWC, reviews the literature around promoting student interest in STEM and examines initial feedback from participants in the pilot year of the club. The findings of this preliminary study indicate that the TWC has the potential to promote interest in STEM. Many of the recommendations from the literature review about promoting interest in STEM were referred to by participants in their responses

    Hydrogen evolution across nano-Schottky junctions at carbon supported MoS2 catalysts in biphasic liquid systems

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    The activities of a series of MoS2-based hydrogen evolution catalysts were studied by biphasic reactions monitored by UV/Vis spectroscopy. Carbon supported MoS2 catalysts performed best due to an abundance of catalytic edge sites and strong electronic coupling of catalyst to support

    Improving the mechanical properties of graphene oxide based materials by covalent attachment of polymer chains

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    We report on the modification of graphene oxide (GO) with poly(vinyl alcohol) (PVA) leading to the mechanical improvement of GO based materials. First, GO was covalently functionalised with PVA by esterification of carboxylic groups on GO with hydroxyl groups of PVA resulting in functionalised f-(PVA)GO. This was carried out for PVA of six different molecular weights. This functionalised graphene oxide could be formed into a paper-like material by vacuum filtration. Papers prepared from f-(PVA)GO showed significant increases in mechanical properties compared to those prepared with GO or with simple mixtures of GO and PVA. The best performance was achieved for PVA functional groups with molecular weights between 50 and 150 kg/mol. Improvements in Young’s moduli of 60% and tensile strength of 400% were observed relative to GO-only paper. The improved mechanical properties are attributed to enhanced inter-flake stress transfer due to the covalently bonded PVA. Second, functionalised f-(PVA)GO was used as filler in * Corresponding author. Tel/Fax: +34 976 73-3977 / -3318. E-mail address: [email protected] (W.K. Maser) 2 PVA-based composites. The application of a pre-selection method allowed the use of only the largest functionalised f-(PVA)GO flakes. This resulted in substantially reinforced PVA-f-(PVA)GO composites. Both modulus and strength increased by 40% relative to the pure polymer for f- (PVA)GO loadings below 0.3 vol.%.The authors would like to acknowledge Science Foundation Ireland, (grant number 07/IN.7/I1772), Spanish Ministry of Science and Innovation (MICINN) under project MAT2010-15026, Spanish Research Council CSIC under project 201080E124 and the Government of Aragon (DGA) under Project DGA-T66 CNN. M.C. thanks MICINN for her PhD contract and funding for research stay at TCD under FPI Programme BES-2008-003503.Peer reviewe
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