Physicochemical characterisation of reduced graphene oxide for conductive thin films.
Physicochemical characterisation of reduced graphene oxide for conductive thin films.
复制标题
DOI：
10.1039/c8ra08849g
复制
发表时间：
2018-11-01
期刊：
影响因子：
3.9
通讯作者：
Silva, S. Ravi P.
中科院分区：
文献类型：
--
作者：
Legge, Elizabeth J.;Ahmad, Muhammad;Smith, Christopher T. G.;Brennan, Barry;Mills, Christopher A.;Stolojan, Vlad;Pollard, Andrew J.;Silva, S. Ravi P.
石墨烯是下一代技术的理想材料。然而，用工业上可应用的方法生产高产率的单层薄片目前是有限的。我们介绍了一种通过维生素C（抗坏血酸）还原氧化石墨烯（GO）并在<150 °C的温度下进行<10分钟的热退火的组合工艺，从而产生薄层电阻降低8个数量级至低至1.3 kΩ □−1的导电薄膜，适用于微电子、显示技术和光电应用。在GO制备和还原的不同阶段对产品进行深入的物理化学表征，可以进一步了解该工艺，并证明由于环境友好的还原剂，溶液可加工性和不需要高温而适用于工业生产方法。维生素C的存在降低了将GO热还原成导电薄膜所需的温度，使得该技术适用于热敏基底，例如低熔点聚合物。同时喷涂和还原GO允许导电涂层的大面积沉积，而不牺牲溶液可加工性（通常通过颗粒团聚而损失），使其与工业过程相容，并且适用于例如传感器、能量装置和用于触摸屏的柔性导电电极的生产。我们介绍了一种通过维生素C（抗坏血酸）和热退火还原氧化石墨烯（GO）的组合工艺。
Graphene is a desirable material for next generation technology. However, producing high yields of single-layer flakes with industrially applicable methods is currently limited. We introduce a combined process for the reduction of graphene oxide (GO) via vitamin C (ascorbic acid) and thermal annealing at temperatures of <150 °C for times of <10 minutes, resulting in electrically conducting thin films with sheet resistances reducing by 8 orders of magnitude to as low as ∼1.3 kΩ □−1, suitable for microelectronics, display technology and optoelectronic applications. The in-depth physicochemical characterisation of the products at different stages of GO preparation and reduction allows for further understanding of the process and demonstrates the suitability for industrial production methodologies due to an environmentally-friendly reducing agent, solution processability and no requirement for high temperatures. The presence of the vitamin C lowers the temperature required to thermally reduce the GO into an electrically conducting thin film, making the technique suitable for thermally sensitive substrates, such as low melting point polymers. Simultaneous spray coating and reduction of GO allows for large area deposition of conductive coatings without sacrificing solution processability, often lost through particle agglomeration, making it compatible with industrial processes, and applicable to, for example, the production of sensors, energy devices and flexible conductive electrodes for touchscreens. We introduce a combined process for the reduction of graphene oxide (GO) via vitamin C (ascorbic acid) and thermal annealing.
登录
查看更多内容
影响因子：
15
作者：
HUMMERS, WS;OFFEMAN, RE
通讯作者：
OFFEMAN, RE
影响因子：
3.7
作者：
Ferrari, AC;Robertson, J
通讯作者：
Robertson, J
影响因子：
3.7
作者：
Claramunt, Sergi;Varea, Aida;Cirera, Albert
通讯作者：
Cirera, Albert
影响因子：
10.8
作者：
Blake, Peter;Brimicombe, Paul D.;Novoselov, Kostya S.
通讯作者：
Novoselov, Kostya S.
影响因子：
3.7
作者：
Ganguly, Abhijit;Sharma, Surbhi;Hamilton, Jeremy
通讯作者：
Hamilton, Jeremy