Controllable Synthesis and Luminescence Properties of La(OH)3 and La(OH)3:Tb3+ Nanocrystals with Multiform Morphologies

✍ Scribed by Guang Jia; Yeju Huang; Yanhua Song; Mei Yang; Lihui Zhang; Hongpeng You

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 700 KB
• Volume: 2009
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200900495

✦ Synopsis

Abstract

One‐dimensional La(OH)~3~ nanocrystals with multiform morphologies have been successfully synthesized by a facile hydrothermal process without using any surfactant, catalyst, or template. It can be found that the pH values of the initial solutions and the alkaline sources play a crucial role in controlling the morphologies of the products. The possible formation process of the 1D samples was investigated in detail. Furthermore, the as‐prepared Tb^3+^‐doped La(OH)~3~ samples show a strong green emission corresponding to ^5^D~4~–^7^F~5~ transition of the Tb^3+^ ions under ultraviolet or low‐voltage excitation. The experimental results indicate that the luminescence properties of the as‐obtained phosphors are dependent on their morphologies and sizes. As a result of the unique luminescence properties and controllable morphology and size, these phosphors may find potential applications in fields such as optoelectronic and nanoscale devices or biological technology.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)