biostudies-literatureUnknown15(43)Benabbas AWe first optimized a simple and low-cost polyol-based synthesis route for the preparation of stable and monodisperse sub-10 nm copper nanoparticles. Building on this robust approach, we extended the method to tin and succeeded in producing tin nanoparticles that stabilized in an unconventional α-Sn phase, which is remarkable given the metastable character of this phase under ambient conditions. The resulting α-Sn nanoparticles exhibited excellent resistance to oxidation, together with long-term colloidal stability in air, enabling further processing for potential applications. In both cases, inexpensive commercial precursors and mild conditions (80 °C, aqueous or polyol solvents, ascorbic acid as the sole reducing agent, and no inert atmosphere or additional stabilizers) were employed. The nanoparticles were characterized using TEM, UV-visible spectroscopy, ATR-FTIR, ICP-OES, and XPS.RSC advances36405-36413https://www.ebi.ac.uk/biostudies/studies/S-EPMC12486232biostudies-literatureFacile and green synthesis of monodisperse sub-10 nm copper and tin nanoparticles using l-ascorbic acid as the reducing agent.PMC12486232Nelayah JBenabbas AEspecel CMineva TBreyton GLe Valant ARicolleau CWang GEpron FGuesmi HfalseFacile and green synthesis of monodisperse sub-10 nm copper and tin nanoparticles using l-ascorbic acid as the reducing agent.We first optimized a simple and low-cost polyol-based synthesis route for the preparation of stable and monodisperse sub-10 nm copper nanoparticles. Building on this robust approach, we extended the method to tin and succeeded in producing tin nanoparticles that stabilized in an unconventional α-Sn phase, which is remarkable given the metastable character of this phase under ambient conditions. The resulting α-Sn nanoparticles exhibited excellent resistance to oxidation, together with long-term colloidal stability in air, enabling further processing for potential applications. In both cases, inexpensive commercial precursors and mild conditions (80 °C, aqueous or polyol solvents, ascorbic acid as the sole reducing agent, and no inert atmosphere or additional stabilizers) were employed. The nanoparticles were characterized using TEM, UV-visible spectroscopy, ATR-FTIR, ICP-OES, and XPS.2025-01-01T00:00:00Z2025 Sep2026-06-04T02:28:02.045Z2026-05-04T03:13:26.483ZS-EPMC124862324104129110.1039/d5ra04557f