High Sensitivity of CdS Nanoparticles and Their Self‐Assembled Films to Mn²⁺ Ions

Abstract

The effects of Mn²⁺ ions (aq.) on the luminescence of CdS nanoparticles and their self‐assembled films were investigated. The luminescence peak of CdS nanoparticles at 645 nm does not shift, while the luminescence intensity of CdS nanoparticles and their self‐assembled films changes significantly with Mn²⁺ ion concentration. The lowest concentration of Mn²⁺ ions that can make the intensity change is 1.0 × 10⁻¹⁴ M. The results indicate that CdS nanoparticles and their self‐assembled films are very sensitive to Mn²⁺ ions (aq.).

Keywords:

• CdS nanoparticles
• self‐assembled films
• Mn²⁺ ions

Acknowledgments

This work is financially supported by the Excellent Young Teachers Program and the Research Foundation for Returned Students Abroad of MOE, China. The authors also thank the Shanghai Educational Committee for support.