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首页> 外文期刊>Nanotechnology >Metal-assisted exfoliation (MAE): green, roll-to-roll compatible method for transferring graphene to flexible substrates
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Metal-assisted exfoliation (MAE): green, roll-to-roll compatible method for transferring graphene to flexible substrates

机译：金属辅助剥离（MAE）：绿色，卷对卷兼容方法，可将石墨烯转移到柔性基材上

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Graphene is expected to play a significant role in future technologies that span a range from consumer electronics, to devices for the conversion and storage of energy, to conformable biomedical devices for healthcare. To realize these applications, however, a low-cost method of synthesizing large areas of high-quality graphene is required. Currently, the only method to generate large-area single-layer graphene that is compatible with roll-to-roll manufacturing destroys approximately 300 kg of copper foil (thickness = 25 mu m) for every 1 g of graphene produced. This paper describes a new environmentally benign and scalable process of transferring graphene to flexible substrates. The process is based on the preferential adhesion of certain thin metallic films to graphene; separation of the graphene from the catalytic copper foil is followed by lamination to a flexible target substrate in a process that is compatible with roll-to-roll manufacturing. The copper substrate is indefinitely reusable and the method is substantially greener than the current process that uses relatively large amounts of corrosive etchants to remove the copper. The sheet resistance of the graphene produced by this new process is unoptimized but should be comparable in principle to that produced by the standard method, given the defects observable by Raman spectroscopy and the presence of process-induced cracks. With further improvements, this green, inexpensive synthesis of single-layer graphene could enable applications in flexible, stretchable, and disposable electronics, low-profile and lightweight barrier materials, and in large-area displays and photovoltaic modules.
机译：石墨烯有望在未来的技术中扮演重要角色，其范围从消费类电子产品到用于能量转换和存储的设备，再到适合医疗保健的生物医学设备。然而，为了实现这些应用，需要一种低成本的合成大面积高质量石墨烯的方法。当前，与卷对卷制造兼容的唯一生成大面积单层石墨烯的方法是每生产1克石墨烯会破坏大约300公斤铜箔（厚度= 25μm）。本文介绍了将石墨烯转移到柔性基板上的一种新的对环境无害且可扩展的新工艺。该方法基于某些金属薄膜对石墨烯的优先粘合。从催化铜箔中分离出石墨烯，然后以与卷对卷制造兼容的方法层压到柔性目标基材上。铜基板可无限期地重复使用，并且该方法比使用相对大量的腐蚀性蚀刻剂去除铜的当前工艺要更加环保。鉴于通过拉曼光谱法可观察到的缺陷以及存在工艺引起的裂纹，通过这种新工艺生产的石墨烯的薄层电阻尚未优化，但原则上应与标准方法生产的薄层电阻相当。通过进一步的改进，这种绿色，廉价的单层石墨烯合成技术可以应用于柔性，可拉伸和一次性电子产品，薄型轻质阻隔材料以及大面积显示器和光伏模块。

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