title: Thiolate-Mediated Photoinduced Synthesis of Ultrafine Ag2S Quantum Dots from Silver Nanoparticles.
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.
authors: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors: Yitao
authors: Y
authors: Cao
authors: Beijing Computational Science Research Center, Beijing, 100084, China.
authors: Wei
authors: W
authors: Geng
authors: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors: Run
authors: R
authors: Shi
authors: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors: Lu
authors: L
authors: Shang
authors: School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand.
authors: Geoffrey I N
authors: GI
authors: Waterhouse
authors: Beijing Computational Science Research Center, Beijing, 100084, China.
authors: Limin
authors: L
authors: Liu
authors: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors: Li-Zhu
authors: LZ
authors: Wu
authors: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors: Chen-Ho
authors: CH
authors: Tung
authors: Department of Chemistry, University of California, Riverside, California, 92521, USA.
authors: Yadong
authors: Y
authors: Yin
authors: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors: Tierui
authors: 0000-0002-7948-9413
authors: T
authors: Zhang
keywords: Ag2S; photoinduced synthesis; quantum dots; silver; thiolate intermediates