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首页> 外文期刊>Colloids and Interfaces >Conductive Nanofilms with Oppositely Charged Reduced Graphene Oxides as a Base for Electroactive Coatings and Sensors
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Conductive Nanofilms with Oppositely Charged Reduced Graphene Oxides as a Base for Electroactive Coatings and Sensors

机译：导电纳米叶片具有相反的带电的石墨烯氧化物作为电活性涂料和传感器的底座

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摘要

We demonstrate a method for the formation of multilayers composed of reduced graphene oxide (rGO), which can be used for transparent, conducting thin films. Using the layer-by-layer (LbL) assembly of positively and negatively charged GO sheets, we could obtain thin films with highly controllable sheet resistance. The natural negative charge of graphene oxide was turned to positive by the amidation reaction. After forming the multilayer films, the graphene oxide underwent thermal reduction at temperatures above 150 °C. The (rGO+/rGO?) films were characterized by UV-Vis and scanning electron microscopy (SEM), and their conductivity was measured by the four-point method. We found that after deposition of five (rGO+/rGO?), the coating structure reached the percolation limit, and the film resistance decreased more gradually to around 20 k?/sq for the films obtained by eleven deposition cycles with graphene oxide reduced at 250 °C. The formation of thin films on polyimide allows the forming of new flexible conductive materials, which can find applications, e.g., in biomedicine as new electroactive, low-cost, disposable sensors.
机译：我们证明了一种形成由石墨烯氧化物（RGO）的多层形成的方法，其可用于透明，导电薄膜。使用正极和带负电的去板的层逐层（LBL）组件，我们可以获得具有高可控薄层电阻的薄膜。通过酰胺化反应转变石墨烯氧化物的自然负电荷。在形成多层膜之后，将石墨烯氧化物在150℃的温度下进行热减少。通过UV-VIS和扫描电子显微镜（SEM）表征（RGO + / RGO？）膜，并通过四点法测量它们的电导率。我们发现在沉积五（Rgo + / Rgoα）后，涂层结构达到渗透极限，并且膜电阻更逐渐降低至约20kΩ·/ sq，用于通过十一沉积循环获得的薄膜，在250处减少石墨烯循环。 °C。聚酰亚胺上的薄膜的形成允许形成新的柔性导电材料，其可以在生物医学中找到应用，例如新的电活性，低成本，一次性传感器。

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