Fabrication of equally oriented pancake shaped gold nanoparticles by SAM-templated OMCVD and their optical response

被引:22
作者
Aliganga, Anne Kathrena A.
Lieberwirth, Ingo
Glasser, Gunnar
Duwez, Anne-Sophie
Sun, Yingzhi
Mittler, Silvia [1 ]
机构
[1] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada
[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[3] Catholic Univ Louvain, Unite Chim & Phys Hauts Polymers, B-1348 Louvain, Belgium
[4] Catholic Univ Louvain, CERMIN, B-1348 Louvain, Belgium
基金
加拿大自然科学与工程研究理事会;
关键词
SAM; OMCVD; gold nanoparticles; aspect ratio; orientation; trimethylphosphinegoldmethyl ((CH3)(3)PAuCH3) precursor; plasmon resonance; cross-talk; cluster formation;
D O I
10.1016/j.orgel.2006.09.002
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The optical response of non-spherical gold nanoparticles not only depends on the size of the objects, but also on their shape and orientation with respect to the polarization direction of the light, exciting the plasmon resonance. This study demonstrates a method to grow non-spherical gold nanoparticles via organometallic chemical vapor deposition (OMCVD) onto planar substrates that are covered by SH-terminated self-assembled monolayers (SAMs). Trimethylphosphinegoldmethyl ((CH3)(3)PAuCH3) is used as the volatile organic precursor. The shape of the deposited particles varies with respect to the nature of the template SAM: disc-like and pancake shaped nanoparticles are fabricated with different aspect rations between the two main axes. UV-vis, AFM, STM, SEM and evanescent waveguide absorption spectroscopy (EWAS) of the OMCVD gold nanoparticles are applied to determine and verify the dimensions and orientation of the nanoparticles in two dimensions. When clusters of nanoparticles are formed, an additional plasmon band with a large red-shift is observed. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:161 / 174
页数:14
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