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首页> 外文期刊>Applied Surface Science >Shape tailoring of hexagonally ordered triangular gold nanoparticles with nanosecond-pulsed laser light
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Shape tailoring of hexagonally ordered triangular gold nanoparticles with nanosecond-pulsed laser light

机译：纳秒脉冲激光对六角形有序三角形金纳米粒子的形状裁剪

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摘要

In this contribution recent results on selective and precise tailoring of triangular gold nanoparticles (NPs) using ns-pulsed laser light are presented. The NPs were prepared by nanosphere lithography and subsequently tailored with ns-pulsed laser light using different fluences and wavelengths. The method is based on the size and shape dependent localized surface plasmon polariton resonance (SPR) of the NPs. We will demonstrate that the gap size between triangular NPs can be tuned from approximately 102 ±14 nm to 122 ±11 nm, due to a shape change of the NP from triangular to oblate. These morphological changes are accompanied by a significant shift of the surface plasmon resonance from λ_(SPR) = 730 nm to λ_(SPR) = 680 nm. Most importantly if the laser wavelength is chosen such that the dipolar SPR is excited, the hexagonal order of the NPs remains intact after irradiation, in contrast to excitation via the quadrupole SPR or within the interband transition. A tuneable gap size and the conservation of the hexagonal order of the NP array is the precondition for applications, where the NPs should serve as anchor points, e.g. for functional molecular nanowires, which can be used to utilize molecular devices.
机译：在这项贡献中，提供了使用ns脉冲激光选择性，精确地剪裁三角形金纳米颗粒（NPs）的最新结果。纳米粒子是通过纳米球体光刻技术制备的，随后使用不同的注量和波长用ns脉冲激光进行定制。该方法基于NP的尺寸和形状相关的局部表面等离振子极化共振（SPR）。我们将证明，由于NP的形状从三角形变为扁圆形，三角形NP之间的间隙大小可以从大约102±14 nm调整为122±11 nm。这些形态变化伴随着表面等离振子共振从λ_（SPR）= 730 nm到λ_（SPR）= 680 nm的显着变化。最重要的是，如果选择激光波长以激发偶极SPR，则与通过四极SPR或在带间跃迁进行激发相比，NPs的六边形在辐照后仍保持完整。可调节的间隙大小和NP阵列六边形的守恒是应用的先决条件，在这些应用中NP应作为锚点，例如NP。用于功能分子纳米线，可用于利用分子装置。

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  • 来源
    《Applied Surface Science》 |2009年第24期|9822-9825|共4页
  • 作者

    Rodica Morarescu; David Blazquez Sanchez; Nils Borg; Tigran A. Vartanyan; Frank Traeger; Frank Hubenthal;

  • 作者单位

    Institut fuer Physik and Center for Interdisciplinary Nanostructure Science and Technology - CINSaT, Universitdt Kassel, Heimich-Ptett-Str. 40, D-34132 Kassel, Germany;

    Institut fuer Physik and Center for Interdisciplinary Nanostructure Science and Technology - CINSaT, Universitdt Kassel, Heimich-Ptett-Str. 40, D-34132 Kassel, Germany;

    Institut fuer Physik and Center for Interdisciplinary Nanostructure Science and Technology - CINSaT, Universitdt Kassel, Heimich-Ptett-Str. 40, D-34132 Kassel, Germany;

    Center for Informational Optical Technologies St. Petersburg State University of Informational Technologies, Mechanics and Optics, Kronverkskiy pr. 49, St. Petersburg 197101, Russian Federation;

    Institut fuer Physik and Center for Interdisciplinary Nanostructure Science and Technology - CINSaT, Universitdt Kassel, Heimich-Ptett-Str. 40, D-34132 Kassel, Germany;

    Institut fuer Physik and Center for Interdisciplinary Nanostructure Science and Technology - CINSaT, Universitdt Kassel, Heimich-Ptett-Str. 40, D-34132 Kassel, Germany;

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  • 正文语种 eng
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  • 关键词

    gold nanoparticles; ns-Pulsed laser light; hexagonal ordered array; nanosphere lithography;

    机译：金纳米粒子ns脉冲激光;六角形有序数组纳米球光刻;

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