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首页> 外文期刊>Chemistry: A European journal >Additive-Free Electrophoretic Deposition of Graphene Quantum Dots Thin Films
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Additive-Free Electrophoretic Deposition of Graphene Quantum Dots Thin Films

机译：石墨烯量子点薄膜的无添加剂电泳沉积

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摘要

The electrophoretic deposition (EPD) of graphenebased materials on transparent substrates is highly potential for many applications. Several factors can determine the yield of the EPD process, such as applied voltage, deposition time and particularly the presence of dispersion additives (stabilisers) in the suspension solution. This study presents an additive-free EPD of graphene quantum dot (GQD) thin films on an indium tin oxide (ITO) glass substrate and studies the deposition mechanism with the variation of the applied voltage (10–50 V) and deposition time (5–25 min). It is found that due to the small size (≈3.9 nm) and high content of deprotonated carboxylic groups, the GQDs form a stable dispersion (zeta-potential of about @35 mV) without using additives. The GQD thin films can be deposited onto ITO with optimal surface morphology at 30 V in 5 min (surface roughness of approximately (3.1±1.3) nm). In addition, as-fabricated GQD thin films also possess some interesting physico-optical properties, such as a double-peak photoluminescence at about λ=417 and 439 nm, with approximately 98% visible transmittance. This low-cost and eco-friendly GQD thin film is a promising material for various applications, for example, transparent conductors, supercapacitors and heat conductive films in smart windows.
机译：透明基板上的石漆基材的电泳沉积（EPD）是许多应用的高潜力。有几个因素可以确定EPD工艺的产量，例如悬浮液中施加的电压，沉积时间，特别是在悬浮液中存在分散添加剂（稳定剂）。该研究介绍了在氧化铟锡（ITO）玻璃基板上的石墨烯量子点（GQD）薄膜的无添加剂EPD，并研究施加电压（10-50V）和沉积时间的变化（5 -25分钟）。结果发现，由于小尺寸（≈3.9nm）和高含量的质子化羧基，GQDS在不使用添加剂的情况下形成稳定的分散体（约35mV的Zeta-position）。 GQD薄膜可以在5分钟内以30V的最佳表面形态沉积在ITO上（表面粗糙度约（3.1±1.3））。另外，制造的GQD薄膜还具有一些有趣的物理光学性质，例如约λ= 417和439nm的双峰光致发光，具有约98％的可见光透射率。这种低成本和环保的GQD薄膜是各种应用的有希望的材料，例如透明导体，超级电容器和智能窗户的导热膜。

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  • 来源
    《Chemistry: A European journal》 |2019年第72期|共9页
  • 作者

    Tam D. Nguyen; Ori Geuli; Loo Pin Yeo; Shlomo Magdassi; Daniel Mandler; Alfred Iing Yoong Tok;

  • 作者单位

    School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 (Singapore);

    Institute of Chemistry The Hebrew University of Jerusalem Jerusalem 9190401 (Israel);

    School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 (Singapore);

    Singapore-HUJ Alliance for Research and Enterprise NEW-CREATE Phase II Campus for Research Excellence and Technological Enterprise (CREATE) Singapore 138602 (Singapore);

    Singapore-HUJ Alliance for Research and Enterprise NEW-CREATE Phase II Campus for Research Excellence and Technological Enterprise (CREATE) Singapore 138602 (Singapore);

    School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 (Singapore);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    electrophoretic deposition; graphene; quantum dots; thin films; visible transparency;

    机译：电泳沉积;石墨烯;量子点;薄膜;可见透明度;

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