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Updated: Mar 17, 2026
09:11
Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
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The electronic structure of Au25 clusters: between discrete and continuous
Khabiboulakh Katsiev1, Nataliya Lozova, Lu Wang
1Department of Chemistry, Texas A&M University (TAMU), Texas 77843, USA.
Nanoscale
|July 26, 2016
Summary
Ligand removal transforms quantized electronic states in gold nanoparticles to hybridized states. Synchrotron resonant photoemission and DFT studies reveal this transition in Au25 clusters.
Area of Science:
- Materials Science
- Surface Science
- Nanotechnology
Background:
- Atomically precise nanoparticles exhibit unique electronic properties due to quantum confinement.
- Ligand shells play a crucial role in modulating nanoparticle behavior.
- Understanding electronic structure transitions is key for designing advanced nanomaterials.
Purpose of the Study:
- To investigate the electronic structure changes in ligand-stabilized gold nanoparticles upon ligand removal.
- To explore the transition from quantum-confined electronic states to hybridized electronic states.
- To elucidate the role of ligands in maintaining electronic quantization.
Main Methods:
- Utilized synchrotron resonant photoemission spectroscopy to probe electronic structure.
- Employed DFT (Density Functional Theory) studies for theoretical support.
- Investigated Au25 clusters as a model system.
Main Results:
- Au25 clusters with intact ligands exhibit quantized electronic states.
- Removal of ligands leads to increased hybridization of electronic states near the Fermi level.
- Experimental observations are consistent with DFT calculations.
Conclusions:
- Ligands are essential for preserving quantum confinement in Au25 nanoparticles.
- Ligand removal induces a significant shift towards electronic hybridization.
- This study provides insights into the electronic structure dynamics of nanomaterials.
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