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Core Modulation of 70-Nuclei Core-Shell Silver Nanoclusters.

Jia-Wei Liu1, Zhi Wang1, Yu-Ming Chai1

  • 1Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China.

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Researchers synthesized novel silver nanocluster assemblies with unique multi-shell structures. A rare silver-10 kernel was discovered, offering new pathways for trapping elusive silver species.

Keywords:
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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Silver nanoclusters are of interest due to their unique electronic and optical properties.
  • Controlling the self-assembly of silver species into complex architectures remains a challenge.

Purpose of the Study:

  • To synthesize and characterize novel hierarchical multi-shell silver nanocluster assemblies.
  • To investigate the formation of elusive silver kernels during self-assembly.

Main Methods:

  • Solvothermal synthesis using silver precursors, sodium molybdate, and organic acids.
  • Crystallization under varying solvent conditions (CH3OH/CH2Cl2 vs. DMF).
  • Single-crystal X-ray diffraction for structural determination.

Main Results:

  • Two distinct silver-molybdate assemblies, SD/Ag70b and SD/Ag70a, were obtained.
  • SD/Ag70b features a [Ag4S4(MoO4)5@Ag66] structure with a silver shell.
  • SD/Ag70a exhibits a rare Ag10 kernel (five fused tetrahedra) within a [Ag10@(MoO4)7@Ag60] hierarchical structure.

Conclusions:

  • The formation of the Ag10 kernel is facilitated by a reduction process involving DMF.
  • This study reveals the structural details of a unique Ag10 kernel.
  • The findings open avenues for trapping elusive silver species within complex nanocluster assemblies using anion templates.