Size-dependent optical properties of Au nanorods

被引：0

作者：

S.L.Smitha ^{[1
,2
]}

K.G.Gopchandran ^{[1
]}

N.Smijesh ^{[3
]}

Reji Philip ^{[3
]}

机构：

[1] Department of Optoelectronics,University of Kerala,Thiruvananthapuram-695 581,India

[2] St.Joseph's College for Women,Alappuzha-688 001,India

[3] Raman Research Institute,C.V.Raman Avenue,Sadashivanagar,Bangalore 560080,India

来源：

Progress in Natural Science:Materials International | 2013年 / 23卷 / 01期

关键词：

Au nanorods; SERS; Crystal violet; Z-scan; Nonlinear absorption; Optical limiting;

D O I：

暂无

中图分类号：

TB383.1 [];

学科分类号：

070205 ; 080501 ; 1406 ;

摘要：

In the fast evolving field of nanoscience and nanotechnology,where size and shape are crucial in deciding the optoelectronic properties of nanomaterials,the understanding of size and shape dependent behavior is of direct relevance to device applications.Present study reports the synthesis of Au nanorods with well controlled aspect ratios,and the influence of the aspect ratio on the surface enhanced Raman scattering(SERS) activity using crystal violet(CV) as the probe molecule.The influence of pH and the concentrations of reducing agent and Ag ions in controlling the aspect ratio of gold nanorods are also investigated.The structural and optical properties of the synthesized samples have been characterized by transmission electron microscopy(TEM) and UV-visible absorption spectroscopy.The nonlinear optical(NLO) transmission of the Au nanorods investigated using the open aperture Z-scan technique revealed the absorption saturation followed by an optical limiting behavior,which may find potential applications in optoelectronic nanodevices.

引用

页码：36 / 43

页数：8