Synthesis of elongated Au nanoparticles in silica matrix by ion irradiation
Synthesis of elongated Au nanoparticles in silica matrix by ion irradiation
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DOI：
10.1063/1.2764556
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发表时间：
2007-08-06
影响因子：
4
通讯作者：
Pippel, E.
中科院分区：
文献类型：
--
作者：
Mishra, Y. K.;Singh, F.;Pippel, E.
本工作报告的合成细长的Au纳米粒子（NPs）彼此平行，嵌入在二氧化硅基质。采用射频磁控溅射法制备了二氧化硅中的Au纳米颗粒，并对其进行了不同能量密度的120 MeV Au离子辐照以诱导其伸长。辐照薄膜的光吸收研究表明，对应于横向和纵向模式的表面等离子体激元带明显分裂。原始和辐照样品的透射电子显微镜调查显示，在Au纳米粒子的伸长（纵横比类似于3.5）发生作为辐照的结果。在热峰模型的框架下对结果进行了讨论。
The present work reports the synthesis of elongated Au nanoparticles (NPs) parallel to each other, embedded in silica matrix. Au NPs in silica, prepared using rf magnetron sputtering, were irradiated by 120 MeV Au ions at different fluences to induce elongation. Optical absorption study of irradiated film showed a clear splitting of surface plasmon bands corresponding to transverse and longitudinal modes. Transmission electron microscopy investigations of pristine and irradiated samples revealed an elongation (aspect ratio of similar to 3.5) in Au NPs occurred as a result of irradiation. The results are discussed in the framework of thermal spike model.