Hugh Geaney

@hughgeaney.bsky.social

Associate Professor in the Department of Chemical Sciences,University of Limerick. Research interests in energy storage materials and nanoscience https://www.geaneyresearchul.com Dad,LFC fanatic,fading cyclist,failed bassist, wannabe chef 🚸⚽🚵‍♀️🎸🍴

Thrilled to be selected as an outstanding reviewer for Energy & Environmental Science 2024. Given the slide in peer reviewing standards and the encroachment of AI, it's more important than ever to ensure the quality of agenda setting journals like E&Es.🔋💡#battchat Full list is at shorturl.at/iJ6tF

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Check out our latest article in Nano Letters on new alkali metal based chalcogenide Na-Cu-S (Synthesis via colloidal chemistry & insights into properties). @pubs.acs.org pubs.acs.org/doi/10.1021/...

Ligand-Assisted Colloidal Synthesis of Alkali Metal-Based Ternary Chalcogenide: Nanostructuring and Phase Control in Na–Cu–S System

The development of sustainable and tunable materials is crucial for advancing modern technologies. We present a controlled synthesis of colloidal Na–Cu–S nanostructures. To overcome the reactivity difference between Na and Cu precursors toward chalcogens in a colloidal synthesis and to achieve metastable phase formation, we designed a single-source precursor for Cu and S. The decomposition of this precursor creates a Cu–S template into which Na ions diffuse to form metastable Na–Cu–S. By leveraging the reactivity of sulfur precursors, we synthesized Na3Cu4S4 (orthorhombic) and Na2Cu4S3 (monoclinic) nanocrystals with distinct properties. A mechanistic investigation reveals a predictive pathway previously unobserved in alkali-metal-based ternary chalcogenide systems. Further, computational DFT calculations demonstrate that Na3Cu4S4 exhibits metallic characteristics while Na2Cu4S3 is semiconducting, with an optimal band gap for photovoltaic applications. This research advances our understanding of ternary chalcogenide systems and establishes a framework for the rational design of complex nanomaterials.

pubs.acs.org