Spectroscopic Identification of Charge Transfer of Thiolated Molecules on Gold Nanoparticles via Gold Nanoclusters

• DOI: 10.1021/jacs.3c11959
• Publication Date: 2024-02-21T10:09:08Z
• Authors: Mohammad Tavakkol...; Noelia Soledad Rubio; Anastasiia Tukova; Junxian Liu; Yuantong Gu; Liangzhi Kou; Yuling Wang
• Keywords: Nanoclusters; Nanochemistry; Surface charge

Investigation of charge transfer needs analytical tools that could reveal this phenomenon, and enables understanding its effect at the molecular level. Here, we show how combination using gold nanoclusters (AuNCs) different spectroscopic techniques be employed to investigate thiolated molecules on nanoparticles (AuNP@Mol). It was found in molecule affected by AuNCs, evidenced amplification surface-enhanced Raman scattering (SERS) signal changes fluorescence lifetime AuNCs. Density functional theory (DFT) calculations further revealed AuNCs amplify process level pumping electrons surface AuNPs. Finite element method (FEM) simulations also showed electromagnetic enhancement mechanism along with chemical determines SERS improvement molecule. This study provides a mechanistic insight into investigation between organic inorganic compounds, which is great importance designing new nanocomposite systems. Additionally, work demonstrates potential as powerful tool used nanochemistry, material science, energy, biomedical fields.