Synthesis, optical properties and self-assembly of gold nanorods

被引:11
作者
Martin, Alfonso [1 ]
Schopf, Carola [1 ]
Pescaglini, Andrea [1 ]
O'Riordan, Alan [1 ]
Iacopino, Daniela [1 ]
机构
[1] Natl Univ Ireland Univ Coll Cork, Tyndall Natl Inst, Nanotechnol Grp, Cork, Ireland
关键词
gold nanorods; single nanoparticle spectroscopy; darkfield spectroscopy; self-assembly; dielectrophoresis; SURFACE-PLASMON RESONANCE; NANOPARTICLES; SPECTROSCOPY; SCATTERING; LINEWIDTH; FLOW;
D O I
10.1080/17458080.2012.711915
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Noble metal nanostructures of different aspect ratios were synthesised and optically characterised at individual nanorod level. Rayleigh scattering spectroscopy/scanning electron microscopy measurements were performed to uniquely correlate optical signatures with nanorod size and shape. Scattering spectra of nanorods were dominated by the intense longitudinal surface plasmon resonance (SPR) band in the near-infrared part of the spectrum. This band was found to be highly shape and size dependent. Droplet evaporation techniques and application of dielectrophoretic forces have been used to organise nanorod dispersions into ordered arrays. Depending on the technique and nanoparticle size used, nanorods were found to form one, two or three dimensional (1D, 2D and 3D) superstructures. Within these superstructures nanorods organised themselves into end-to-end lines (1D), side-to-side fashion (2D) or hexagonal arrangements (3D).
引用
收藏
页码:688 / 702
页数:15
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