Thiolate‐Mediated Photoinduced Synthesis of Ultrafine Ag2S Quantum Dots from Silver Nanoparticles |
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| Authors: | Yitao Cao Dr Wei Geng Run Shi Dr Lu Shang Prof Geoffrey I N Waterhouse Prof Limin Liu Prof Li‐Zhu Wu Prof Chen‐Ho Tung Prof Yadong Yin Prof Tierui Zhang |
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| Institution: | 1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China;2. University of Chinese Academy of Sciences, Beijing, China;3. Beijing Computational Science Research Center, Beijing, China;4. School of Chemical Sciences, The University of Auckland, Auckland, New Zealand;5. Department of Chemistry, University of California, Riverside, California, USA |
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| Abstract: | Photoinduced syntheses offer significant advantages over conventional thermal strategies, including improved control over reaction kinetics and low synthesis temperatures, affording nanoparticles with nontrivial and thermodynamically unstable structures. However, the photoinduced syntheses of non‐metallic nanocrystalline products (such as metal sulfides) have not yet been reported. Herein, we demonstrate the first photoinduced synthesis of ultrafine (sub‐2 nm) Ag2S quantum dots (QDs) from Ag nanoparticles at 10 °C. By thorough investigation of the mechanism for the transformation, a fundamental link was established between the intrinsic structures of the molecular intermediates and the final Ag2S products. Our results confirm the viability of low‐temperature photochemical approaches in metal sulfide synthesis, and demonstrate a new rule which could be followed in it. |
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| Keywords: | Ag2S photoinduced synthesis quantum dots silver thiolate intermediates |
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