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Atomically Precise Multimetallic Semiconductive Nanoclusters with Optical Limiting Effects.

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Summary
This summary is machine-generated.

Researchers stabilized novel silver-titanium oxo nanoclusters, demonstrating tunable optical limiting effects. These findings offer new insights into multimetallic nanoclusters and heterogeneous materials.

Keywords:
cluster compoundscore-shell structureoptical limitingsilvertitanium-oxo cluster

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Inorganic Chemistry

Background:

  • Noble-metal clusters are crucial in catalysis and electronics.
  • Stabilizing discrete multinuclear noble-metal clusters remains challenging.
  • Titanium-oxo clusters offer a promising platform for stabilizing metal clusters.

Purpose of the Study:

  • To synthesize and characterize novel multinuclear noble-metal clusters stabilized by Ti-oxo clusters.
  • To investigate the structural diversity and optical properties of these nanoclusters.
  • To explore their potential applications in optical limiting.

Main Methods:

  • Precise atomic-level synthesis of silver-titanium oxo nanoclusters (Ag6 @Ti16).
  • Characterization using advanced spectroscopic and crystallographic techniques.
  • Evaluation of optical limiting performance using 532 nm laser irradiation.

Main Results:

  • Successfully stabilized two unprecedented Ag6 @Ti16 -oxo nanoclusters with defined atomic structures.
  • Observed diverse geometric configurations of the Ag6 core within the Ti16 -O shell due to varying synthesis conditions.
  • Demonstrated significant optical limiting effects, with transmittance reduction up to 43% at 532 nm, showing concentration dependence.

Conclusions:

  • This study pioneers the stabilization of multinuclear noble-metal clusters using Ti-oxo clusters.
  • Structural variations within the nanoclusters directly impact their optical limiting capabilities.
  • These findings pave the way for developing new multimetallic semiconductive nanoclusters and serve as models for noble-metal/TiO2 heterogeneous systems.