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Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition
Published on: December 21, 2015
Controlled spatial separation of Eu ions in layered silicates with different layer thickness
Makoto Ogawa1, Yusuke Ide, Masaya Mizushima
1Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjyuku-ku, Tokyo 169-8050, Japan. makoto@waseda.jp
Chemical Communications (Cambridge, England)
|March 18, 2010
Summary
Layer thickness in europium(III)-doped layered silicates influences photoluminescence intensity. Thicker layers may enhance luminescence by reducing self-quenching due to spatial separation of europium ions.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Luminescence
Background:
- Layered silicates are versatile materials with applications in catalysis, adsorption, and optoelectronics.
- Europium(III) ions (Eu3+) are well-known luminescent dopants, emitting characteristic red light.
- Understanding structure-property relationships in doped materials is crucial for optimizing their performance.
Purpose of the Study:
- To investigate the photoluminescence properties of Eu3+ doped layered silicates.
- To determine the effect of silicate layer thickness on luminescence intensity.
- To explore the relationship between Eu3+ spatial distribution and luminescence self-quenching.
Main Methods:
- Synthesis of four types of layered silicates: kanemite, octosilicate, magadiite, and kenyaite.
- Doping of these silicates with europium(III) ions.
- Characterization of photoluminescence properties, including intensity measurements.
Main Results:
- Photoluminescence was successfully observed in all Eu3+ doped layered silicates.
- A clear correlation was found between the layer thickness of the silicate and the luminescence intensity.
- Increased layer thickness appeared to reduce luminescence self-quenching.
Conclusions:
- Layer thickness is a critical factor influencing the photoluminescence of Eu3+ in layered silicates.
- Spatial separation of Eu3+ ions perpendicular to the silicate sheets plays a role in luminescence self-quenching.
- These findings provide insights for designing novel luminescent materials based on layered silicates.
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