Composto, Russell J

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  • Publication
    Hydrogenation of Mg film and Mg nanoblade array on Ti coated Si substrates
    (2008-10-23) He, Yuping; Zhao, Yiping; Huang, Liwei; Wang, Howard; Composto, Russell J
    The hydrogenation of Mg film and Mg nanoblade array fabricated on Ti coated Si substrates has been studied and compared. The nanoblades start to absorb hydrogen at a temperature between 250 and 300 degrees C, which is much lower than 350 degrees C for Mg film. However, the saturated total hydrogen uptake in nanoblades is less than half of that in the film, resulting from MgO formation by air exposure. The nanoblade morphology with large surface area and small hydrogen diffusion length, and the catalytic effect of Ti layer, are two main reasons for the nanoblade hydrogenation behavior.
  • Publication
    Investigating CoolSeal as an Urban Heat Solution in Philadelphia
    (2025-09-15) Chiang, Julia; Composto, Russell J
    Extreme heat plagues Philadelphia, driving high energy consumption, increased public health risk, and exacerbated temperature inequities. The Composto Lab has partnered with the Philadelphia Office of Sustainability to pilot CoolSeal, a reflective asphalt street coating with potential to mitigate heat risk. Through qualitative interviews, competitor analysis, and pilot site measurements, our team outlines CoolSeal's feasibility and performance. CoolSeal shows significant surface temperature reductions, but its high cost may limit widespread adoption. CoolSeal lies within a broader set of extreme heat solutions. For detailed quantitative findings on surface temperature and mean radiant temperature, please reference "Evaluation of Asphalt Coatings’ Impact on Urban Heat in Philadelphia" by Nafisa Bangura and Angelica Dadda.