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oai:figshare.com:article/34024837 2026-09-29T15:39:39Z category_4 category_8 category_15 category_21 category_873 category_39 category_69 portal_63 item_type_6 month_year_09_2026

Redox Reactions in Molten Indium Halide Salts Enable the Synthesis and Shape Control of In-Pnictide Nanocrystals Justin C. Ondry (3070980) Zirui Zhou (8903816) Luca Giordano (5620832) Yi-Chen Chen (656138) Jun Hyuk Chang (3206856) Yuan Liu (88411) Rebecca C. Hotton (25137709) Shengsong Yang (9930121) Zeger Hens (1272621) A. Paul Alivisatos (1269918) Dmitri V. Talapin (1235877) Biochemistry Microbiology Neuroscience Biotechnology Chemical Sciences not elsewhere classified Ecology Inorganic Chemistry strong lewis acid recovered solids reveal preferential substrate orientation oxidative pnictide loss monolayer zns growth highly faceted tetrahedra conventional organic solvents whereas bromide melts coupling salt reduction certain reaction conditions enabling direct synthesis 4 </ sub salt annealing reaction environments iodide melts shape control raman probes preserving annealing powder xrd insb nanocrystals halide speciation halide coordination free processing converting round controlled ripening combining molten chemical stability chemical benefits Molten indium halide salts enable high-temperature and oxygen-free processing and production of III–V nanocrystals, but their redox chemistry can also induce nanocrystal decomposition. Here we show that redox potential of indium halide melts controls the chemical stability of InP, InAs, and InSb nanocrystals. Raman probes of halide speciation and powder XRD of recovered solids reveal that iodide melts, such as KInI₄, can oxidize indium pnictide nanocrystals, coupling salt reduction to oxidative pnictide loss, whereas bromide melts, such as KInBr₄, resist reduction and stabilize InP and InAs nanocrystals. This redox-tuned stability enables composition-preserving annealing that smooths (111) facets, converting round or tetrapod-like InP and InAs particles into highly faceted tetrahedra, and promotes atomically aligned self-assembly and preferential substrate orientation. Controlled ripening in KInBr₄ yields larger III–V colloids inaccessible by synthesis conducted in conventional organic solvents. Furthermore, combining molten-salt annealing with monolayer ZnS growth by colloidal atomic layer deposition (c-ALD) produces significant photoluminescence enhancement, underscoring the chemical benefits of redox-tuned molten salt solvents for the synthesis of novel III–V nanocrystals. Finally, we demonstrate a strategy to enhance the reactivity of reduced indium halide salts through halide coordination with a strong Lewis acid, enabling direct synthesis of InP and InAs nanocrystals. Reaction environments with highly reactive reduced indium salt engineered in molten salts also reveal that under certain reaction conditions, unprecedented 2D InP nanoplatelets can be synthesized. 2026-09-29T00:00:00Z Text Journal contribution 10.1021/jacs.6c10386.s001 https://figshare.com/articles/journal_contribution/Redox_Reactions_in_Molten_Indium_Halide_Salts_Enable_the_Synthesis_and_Shape_Control_of_In-Pnictide_Nanocrystals/34024837 CC BY-NC 4.0