Prof. Yang Liangbao from Hefei Institutes of Physical Science, Chinese Academy of Sciences (CAS), and his research team have utilized Surface-enhanced Raman Spectroscopy (SERS) to observe the interactions between aromatic molecules and Au surfaces on a single Au nanodimer.
The interface interaction between aromatic molecules and noble metals is crucial in both fundamental science and technological applications. However, due to limitations in characterization technology and the complexity of experimental conditions, there is still a lack of quantitative understanding of the specific mechanism of this interaction under environmental conditions.
To address this issue, the research team created an Au nanodimer structure with a subnanometer gap, allowing scientists to obtain surface molecular vibration spectrum information using SERS. Additionally, they achieved highly sensitive SERS detection of polycyclic aromatic hydrocarbons (PAHs) using the same structure, revealing that the SERS sensitivity of PAHs increases as the number of aromatic rings in the molecule increases, offering a new approach for highly sensitive detection of aromatic molecules.
Furthermore, the study also unveiled the physical adsorption types of aromatic molecules on the Au surface and the electron density distribution at the interface.
2024-01-19 18:41:03
Original from phys.org