ArticleSmall (Weinheim an der Bergstrasse, Germany)2026
Tunable Colloidal Synthesis Enabling μ-ARPES on Individual Bismuth Nanocrystals.
Article in Small (Weinheim an der Bergstrasse, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Bismuth (Bi) nanomaterials are a promising platform for quantum and energy technologies due to strong spin-orbit coupling, high thermoelectric efficiency, and magnetoresistance. However, scalable and flexible synthesis of high-quality Bi nanostructures with fast research turnaround remains challenging. We report a controlled colloidal synthesis of Bi nanosheets with tunable lateral sizes (0.6-4.1 µm), hexagonal shape, and a layered single-crystalline structure along the {00l} planes. The Bi nanosheets exhibit excellent long-term structural stability and these colloidal nanostructures offer several key advantages: single-crystalline structure; tunability in size, shape, dimensionality, and doping; stability in solution, enabling solution-based processing; protection against oxidation by surface ligands; and cost-effective and scalable production. Here, we show that colloidal Bi nanosheets can even be directly investigated using techniques such as angle-resolved photoemission spectroscopy (ARPES). ARPES measurements on individual Bi nanosheets reveal a band structure in excellent agreement with DFT calculations, confirming high crystal quality and uniformity. Our findings demonstrate that colloidal-synthesized Bi nanosheets provide a scalable platform for producing and characterizing high-quality nanosheets, offering potential for integrations in advanced quantum, spintronic, and energy technologies.
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