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首页> 外文期刊>Journal of Materials Research >Structural and photoluminescence properties of laser processed ZnO/carbon nanotube nanohybrids
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Structural and photoluminescence properties of laser processed ZnO/carbon nanotube nanohybrids

机译：激光加工ZnO /碳纳米管纳米杂化物的结构和光致发光特性

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摘要

Zinc oxide (ZnO)/carbon-nanotubular-structures (CNTS) nanohybrids were grown using a three-step laser process. First, an ultraviolet (UV) laser (KrF) was used to deposit Co/Ni catalyst nanoparticles (NP) directly onto SiO_2Si substrates. Second, a random network of CNTS was grown onto these Co/Ni-catalyzed substrates by using the UV-laser ablation method. Finally, ZnO nanostructures were grown onto the CNTS template by means of the CO_2 laser-induced chemical liquid deposition technique. While the laterally grown CNTS mainly consist of nanotube bundles featuring a high aspect ratio (diameter of ～20 nm and length of up to several microns), the ZnO nanostructures were found to consist of various morphologies including nanorods, polypods, and nanoparticles with a size as small as 2 nm. The ZnO/CNTS nanohybrids were found to exhibit a polychromatic photoluminescent (PL) emission, at room temperature, comprising a narrow near-UV band centered around 390 nm, a broad visible to near infrared band (500-900 nm), and a relatively weak emission band centered around 1000 nm. These PL results are compared to those of individual components (CNTS and ZnO) and discussed in terms of carbon defect density and possible charge transfer between the ZnO nanocrystals and the carbon nanotubes.
机译：使用三步激光工艺生长了氧化锌（ZnO）/碳纳米管结构（CNTS）纳米杂化物。首先，使用紫外线（KrF）激光将Co / Ni催化剂纳米颗粒（NP）直接沉积到SiO_2Si衬底上。其次，通过使用紫外激光烧蚀方法，将CNTS的随机网络生长在这些Co / Ni催化的基底上。最后，利用CO_2激光诱导化学液相沉积技术将ZnO纳米结构生长到CNTS模板上。侧向生长的CNTS主要由具有高纵横比（直径约20 nm，长度可达几微米）的纳米管束组成，但发现ZnO纳米结构由各种形态组成，包括纳米棒，多脚架和具有一定尺寸的纳米颗粒小至2 nm。发现ZnO / CNTS纳米杂化物在室温下表现出多色光致发光（PL）发射，包括以390 nm为中心的狭窄的近UV带，从可见到近红外的宽频带（500-900 nm）和相对的弱发射带集中在1000 nm附近。将这些PL结果与单个成分（CNTS和ZnO）的结果进行比较，并就碳缺陷密度以及ZnO纳米晶体与碳纳米管之间可能的电荷转移进行了讨论。

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  • 来源
    《Journal of Materials Research》 |2009年第11期|3313-3320|共8页
  • 作者

    Brahim Aiessa; Christian Fauteux; My Ali El Khakani; Daniel Therriault;

  • 作者单位

    Institut National de la Recherche Scientifique, INRS-Energie, Materiaux et Telecommunications, Varennes, QC, Canada J3X 1S2;

    Institut National de la Recherche Scientifique, INRS-Energie, Materiaux et Telecommunications, Varennes, QC, Canada J3X 1S2;

    Institut National de la Recherche Scientifique, INRS-Energie, Materiaux et Telecommunications, Varennes, QC, Canada J3X 1S2;

    Department of Mechanical Engineering, Ecole Polytechnique de Montreal, Montreal, QC, Canada H3C 3A7;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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