Electron–hole reduced effective mass in monoatomic …–O–Ti–O–Ti–O–… quantum wires embedded in the siliceous crystalline matrix of ETS-10
✍ Scribed by C. Lamberti
- Book ID
- 104431732
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 217 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1387-1811
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✦ Synopsis
Optical absorption edge measurements on a new microporous crystalline material, Engelhard titanosilicate (ETS-10), containing monoatomic …-O-Ti-O-Ti-O-… wires embedded in an insulating SiO 2 guest allowed us to determine the bandgap blue shift due to the charge carrier confinement. This has enabled the determination of the effective reduced mass m of electrons and holes in a one-dimensional quantum sized …-O-Ti-O-Ti-O-… wire having unprecedented geometrical definition (1.66 m e <m<1.97 m e
). Besides this relevant finding, related to the peculiar structure of ETS-10, the present work underlines the future possible role that micro-and mesoporous materials could play in the field of optoelectronic and non-linear optics, dominated up to now by quantum confinement in III-V and II-VI semiconductors.