Utilizing dynamic annealing during ion implantation: synthesis of silver nanoparticles in crystalline lithium niobate
Utilizing dynamic annealing during ion implantation: synthesis of silver nanoparticles in crystalline lithium niobate
复制标题
DOI：
10.1088/0957-4484/25/13/135611
复制
发表时间：
2014-04
期刊：
影响因子：
3.5
通讯作者：
S. Wolf;J. Rensberg;H. Stöcker;B. Abendroth;W. Wesch;C. Ronning
中科院分区：
文献类型：
--
作者：
S. Wolf;J. Rensberg;H. Stöcker;B. Abendroth;W. Wesch;C. Ronning
嵌入铌酸锂中的银纳米颗粒（NP）是通过离子束合成制造的，适用于各种等离子体应用，例如增强光学非线性效应。室温银注入后，在400-600℃的温度范围内进行退火，以使受损的铌酸锂表面层再结晶。针对不同的退火步骤，分析了银纳米粒子的形状、光学性质以及周围基质的结构性质。 TEM 研究表明，400 °C 退火不会导致损坏的铌酸锂再结晶。将退火温度提高到 500 或 600 °C 时会发生再结晶，但同时会形成由三铌酸锂组成的第二相。 XRD 测量也支持了这一点。通过利用动态退火，即在 400 °C 的高温下注入银，结果表明 LiNbO3 基体在离子注入过程中保持单晶状态，并且没有形成 LiNb3O8。通过将表面等离子共振的位置与基于米氏散射理论的计算进行比较，进一步验证了这一点。
Silver nanoparticles (NPs) embedded in lithium niobate were fabricated via ion beam synthesis and are suitable for various plasmonic applications, e.g. enhancement of optical nonlinear effects. After room temperature silver implantation, annealing in the temperature range of 400–600 °C was performed in order to recrystallize the damaged lithium niobate surface layer. The shape of the silver NPs, their optical properties as well as the structural properties of their surrounding matrix have been analyzed for various annealing steps. TEM investigations show that annealing at 400 °C does not lead to recrystallization of the damaged lithium niobate. A recrystallization occurs upon increasing the annealing temperature to 500 or 600 °C, but simultaneously a second phase consisting of lithium triniobate forms. This is additionally supported by XRD measurements. By utilizing dynamic annealing, i.e. implanting silver at elevated temperatures of 400 °C, it is shown that the LiNbO3 matrix stays single crystalline during ion implantation and no LiNb3O8 is formed. This is additionally verified by comparing the positions of the surface plasmon resonances with calculations based on Mie’s scattering theory.