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Synthesis of elongated Au nanoparticles in silica matrix by ion irradiation

被引：104
作者：
Mishra, Y. K.
Singh, F.
Avasthi, D. K.
Pivin, J. C.
Malinovska, D.
Pippel, E.
机构：
[1] Inter Univ Accelerator Ctr, New Delhi 110067, India
[2] CNRS, IN2P3, CSNSM, F-91405 Orsay, France
[3] Bulgarian Acad Sci, CLSENES, BU-1784 Sofia, Bulgaria
[4] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 06期
关键词：
D O I：
10.1063/1.2764556
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：3
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