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Atomically Precise Ag42 Nanocluster: Shell Structure Modulation and Photothermal Conversion Properties
Along Ma1, Yonggang Ren2, Shuo Zhang1,2
1State Key Laboratory of Advanced Optical Polymer and Manufacturing Technology, College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology, Qingdao 266042,P. R. China.
Inorganic Chemistry
|June 10, 2026
Summary
New silver nanoclusters (Ag42) with a hollow core and integrated shell show superior photothermal conversion and stability. This breakthrough offers insights for designing advanced photothermal materials.
Area of Science:
- Nanomaterials Chemistry
- Photothermal Conversion
- Surface Science
Background:
- Shell structure significantly impacts photothermal conversion properties of nanomaterials.
- Developing efficient and stable photothermal agents is crucial for various applications.
Purpose of the Study:
- To synthesize and characterize a novel silver nanocluster (Ag42) with a unique core-shell structure.
- To evaluate the photothermal performance and stability of Ag42 compared to existing materials.
- To elucidate the structure-property relationships governing the enhanced photothermal conversion.
Main Methods:
- Synthesis and characterization of Ag42 nanoclusters.
- Photothermal performance evaluation under 450 nm light irradiation.
- Stability testing under prolonged irradiation.
- Analysis of photophysical properties (molar absorption coefficient, PLQY) and structural rigidity.
Main Results:
- Ag42 nanoclusters demonstrated a remarkable temperature rise (22.4 °C) and photothermal conversion efficiency (75.27%).
- Ag42 significantly outperformed the classical Ag44 nanoclusters in both efficiency and stability.
- Enhanced performance is attributed to shell modulation, high molar absorption coefficient, favorable charge transfer, negligible PLQY, and increased shell rigidity.
Conclusions:
- The novel Ag42 nanoclusters exhibit superior photothermal conversion properties and stability.
- Shell structure plays a critical role in modulating photothermal performance.
- These findings pave the way for designing next-generation photothermal materials.
