Abstract La(OH)3 nanorods with different aspect ratios have been successfully synthesized by a simple hydrothermal method without using any surfactant, catalyst, or template. The amount of the alkali source in the initial solution and reaction time play a key role in controlling the morphology and particle size of the La(OH)3 products. Subsequently, the as-obtained La(OH)3 samples are used as precursor to fabricate the La2O3 nanorods after an annealing process. The lanthanide ions Ln3+ (Ln = Er, Tb, Eu) doped La2O3 samples exhibit characteristic emissions corresponding to the electronic transitions of the Ln3+ ions. Moreover, the morphologies and sizes of the luminescent materials have a great influence on their luminescence properties. Based on the unique luminescent properties and controllable morphology and size, these luminescent materials may find potential applications in fields such as lighting, optical displays, and optoelectronic devices.

中文翻译：

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不同纵横比的一维La2O3和La2O3:Ln3+ (Ln = Er, Eu, Tb)纳米棒的可控合成和发光特性

摘要 在不使用任何表面活性剂、催化剂或模板的情况下，通过简单的水热法成功合成了不同长径比的 La(OH)3 纳米棒。初始溶液中碱源的量和反应时间在控制 La(OH)3 产物的形态和粒径方面起着关键作用。随后，获得的 La(OH)3 样品用作前体，在退火过程后制造 La2O3 纳米棒。镧系离子 Ln3+ (Ln = Er, Tb, Eu) 掺杂的 La2O3 样品表现出与 Ln3+ 离子的电子跃迁对应的特征发射。此外，发光材料的形貌和尺寸对其发光性能有很大影响。基于独特的发光特性和可控的形态和尺寸，