Preparation of Luminescent Polyelectrolyte/Cu-Doped ZnSe Nanoparticle Multilayer Composite Films
✍ Scribed by Encai Hao; Hao Zhang; Bai Yang; Hui Ren; Jiacong Shen
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 77 KB
- Volume
- 238
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
ZnSe and Cu-doped ZnSe nanoparticle aqueous suspensions were prepared in the presence of mercaptopropionic acid (MPA). Cu-doped ZnSe nanoparticles exhibited a strong blue emission that was strongly dependent upon the Cu dopant level and the chemical surface passivation produced by zinc-mercaptopropionic acid complexes. These Cu-doped ZnSe nanoparticles were further assembled into ultrathin polymer-supported films using electrostatic interactions and the layer-by-layer assembly method. UVvisible spectroscopy and X-ray photoelectron spectroscopy (XPS) provided evidence for the presence and optical activity of Cudoped ZnSe nanoparticles within the polymer ultrathin films. Moreover, XPS data supported the presence of zinc mercaptopropionic acid complexes on nanoparticle surfaces and the presence of Cu + ions with high luminescent activity in the doped nanoparticles.