Combustion-Assisted Photonic Annealing of Printable Graphene Inks via Exothermic Binders

Data corresponds to the demonstration of photonic curing of graphene/nitrocellulose patterns, in which the exothermic decomposition of nitrocellulose modifies and aids the annealing reaction. Few-layer graphene flakes are produced by liquid-phase exfoliation and stabilized by nitrocellulose to formulate inks suitable for direct write printing. Graphene thin films exhibit high conductivity and mechanical flexibility following the photonic annealing step, along with a porous microstructure. Characterization of the materials using Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, thermal gravimetric analysis, differential scanning calorimetry, and electrical measurements reveals suitable properties for application in printed and flexible electronics, with microsupercapacitors demonstrated leveraging the porous microstructure and process compatibility with paper and plastic substrates. DOI:10.1021/acsami.7b07189

本数据集对应石墨烯/硝酸纤维素图案的光子固化（photonic curing）演示实验，实验中硝酸纤维素的放热分解反应可调控并辅助退火过程。研究通过液相剥离法（liquid-phase exfoliation）制备少层石墨烯片（few-layer graphene flakes），并以硝酸纤维素对其进行稳定化处理，以此配制出适用于直写打印（direct write printing）的功能油墨。经光子退火（photonic annealing）步骤处理后，所得石墨烯薄膜兼具高导电性与优异机械柔韧性，同时拥有多孔微观结构。研究团队采用拉曼光谱（Raman spectroscopy）、傅里叶变换红外光谱（Fourier transform infrared spectroscopy）、扫描电子显微镜（scanning electron microscopy）、热重分析（thermal gravimetric analysis）、差示扫描量热法（differential scanning calorimetry）及电学测试对材料开展系统表征，结果表明该材料具备适配印刷电子与柔性电子领域的优良性能；此外，依托其多孔微观结构以及与纸张、塑料基底的工艺兼容性，本研究还成功制备出微型超级电容器（microsupercapacitors）。DOI:10.1021/acsami.7b07189