Formation and plasmonic response of self-assembled layers of colloidal gold nanorods and branched gold nanoparticles.
Formation and plasmonic response of self-assembled layers of colloidal gold nanorods and branched gold nanoparticles.
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DOI：
10.1021/la300199j
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
K. M. Schulz;S. Abb;R. Fernandes;Martina Abb;A. Kanaras;O. Muskens
中科院分区：
文献类型：
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作者：
K. M. Schulz;S. Abb;R. Fernandes;Martina Abb;A. Kanaras;O. Muskens
利用光学技术研究了棒状和支状金纳米粒子自组装层的等离子体性质。采用表面活性剂引导、种子介导生长的方法合成纳米颗粒。通过在极性和非极性溶剂之间的界面上逐渐组装纳米颗粒获得层，并转移到玻璃载玻片上。偏振和角度相关消光测量表明，由金纳米棒制成的层受有效的介质响应控制。用随机光散射表征了支化金颗粒层的响应。空间模式结构的微观映射证明了纳米颗粒层在亚微米长度尺度下的均匀光学响应。
The plasmonic properties of self-assembled layers of rod- and branched-shaped gold nanoparticles were investigated using optical techniques. Nanoparticles were synthesized by a surfactant-guided, seed-mediated growth method. The layers were obtained by gradual assembly of nanoparticles at the interface between a polar and a nonpolar solvent and were transferred to a glass slide. Polarization and angle-dependent extinction measurements showed that the layers made of gold nanorods were governed by an effective medium response. The response of the layers made by branched gold particles was characterized by random light scattering. Microscopic mapping of the spatial mode structure demonstrates a uniform optical response of the nanoparticle layers down to a submicrometer length scale.