Reactive strategy-based SERS determination of O₂˙^- generated from sunscreen

Area of Science:

• Analytical Chemistry
• Materials Science
• Nanotechnology

Background:

• Superoxide anion radical (O2˙-) is a key reactive oxygen species.
• Titanium dioxide (TiO2) under UV radiation generates O2˙-.
• Accurate detection of O2˙- is crucial for understanding UV-induced processes.

Purpose of the Study:

• To design and validate a novel surface-enhanced Raman scattering (SERS) nanoprobe.
• To quantify superoxide anion radical (O2˙-) generated from TiO2 under UV irradiation.
• To establish a sensitive method for O2˙- detection.

Main Methods:

• Development of a reactive SERS nanoprobe.
• Utilizing UV radiation to induce O2˙- production from TiO2.
• Employing SERS spectroscopy for O2˙- quantification.

Main Results:

• A novel SERS nanoprobe was successfully designed.
• The nanoprobe effectively detected O2˙- produced by UV-irradiated TiO2.
• A limit of detection (LOD) of 9.0 nmol L-1 for O2˙- was achieved.

Conclusions:

• The developed SERS nanoprobe offers a sensitive and novel approach for O2˙- determination.
• This method provides new insights into O2˙- generation from TiO2 under UV light.
• The reactive strategy enhances the capability of SERS for detecting reactive oxygen species.