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首页> 外文期刊>Applied Surface Science >Structural characterization and plasmonic properties of two-dimensional arrays of hydrophobic large gold nanoparticles fabricated by Langmuir-Blodgett technique
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Structural characterization and plasmonic properties of two-dimensional arrays of hydrophobic large gold nanoparticles fabricated by Langmuir-Blodgett technique

机译：Langmuir-Blodgett技术制备的疏水性大金纳米颗粒二维阵列的结构表征和等离子体性能

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摘要

We have succeeded in fabricating two-dimensional (2D) arrays of larger gold nanoparticles (AuNPs) (diameters 17, 28, and 48 nm) by Langmuir-Blodgett (LB) method. Although the particle size of AuNPs is one of the most important factors in order to control the optical properties of 2D arrays, there have been reported only the size of less than similar to 20nm. This is a first report on the bottom-up fabrication of 2D arrays consisting of hydrophobic AuNP with the diameter of similar to 50 nm, of which the size is expected to obtain maximum near-field effects. Octadecylthiolate-capped AuNPs (ODT-AuNPs) which were prepared by our method could be re-dispersed in chloroform even after drying completely, realizing the spreading of the colloidal chloroform solution onto the water surface. Accordingly, densely-packed 2D LB films of ODT-AuNPs could be fabricated on an indium-tin-oxide substrate, when water as the sub phase and polyethylene glycol (PEG) as an amphiphilic agent were used. PEG played an important role to form densely-packed film uniformly due to increasing affinity between hydrophobic AuNP and water. Absorption spectra of the films revealed that the resonance wavelengths of plasmon oscillation through interparticle plasmon coupling were clearly correlated with the particle sizes rather than deposition densities. (C) 2017 Elsevier B.V. All rights reserved.
机译：我们已经通过Langmuir-Blodgett（LB）方法成功地制造了较大金纳米颗粒（AuNPs）（直径17、28和48 nm）的二维（2D）阵列。尽管AuNPs的粒径是控制2D阵列光学特性的最重要因素之一，但据报道只有小于20nm的粒径。这是有关自底向上制造2D阵列的首次报道，该阵列由直径近似于50 nm的疏水AuNP组成，其尺寸有望获得最大的近场效应。通过本方法制备的十八烷基硫醇盐封端的AuNPs（ODT-AuNPs）甚至可以在完全干燥后再分散在氯仿中，从而实现胶体氯仿溶液在水表面的扩散。因此，当使用水作为副相并且使用聚乙二醇（PEG）作为两亲剂时，可以在铟锡氧化物基底上制备ODT-AuNPs的致密堆积二维LB膜。由于疏水性AuNP与水之间的亲和力不断提高，PEG在均匀地形成致密堆积的薄膜方面起着重要作用。薄膜的吸收光谱表明，通过粒子间等离子体激元耦合的等离子体激元振荡的共振波长与粒径而不是沉积密度明显相关。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2017年第may15期|350-356|共7页
  • 作者

    Ishida Takuya; Tachikiri Yuki; Sako Takayuki; Takahashi Yukina; Yamada Sunao;

  • 作者单位

    Kyushu Univ, Grad Sch Engn, Dept Mat Phys & Chem, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan|Univ Tokyo, Inst Ind Sci, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan;

    Kyushu Univ, Grad Sch Engn, Dept Mat Phys & Chem, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan;

    Kyushu Univ, Grad Sch Engn, Dept Mat Phys & Chem, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan;

    Kyushu Univ, Fac Engn, Dept Appl Chem, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan;

    Kyushu Univ, Fac Engn, Dept Appl Chem, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan|Kyushu Univ, Ctr Future Chem, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan;

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  • 正文语种 eng
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  • 关键词

    Localized surface plasmon; Two-dimensional array; Hydrophobic gold nanoparticles; Langmuir-Blodgett;

    机译：局部表面等离子体激元二维阵列疏水金纳米粒子Langmuir-Blodgett;

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