Mechanical Engineering, University of California Berkley, Berkeley, CA, 94704, USA.
Berkeley Sensor and Actuator Center, Berkeley, CA, 94704, USA.
Adv Mater. 2018 Jun;30(26):e1800062. doi: 10.1002/adma.201800062. Epub 2018 May 15.
Versatile and low-cost manufacturing processes/materials are essential for the development of paper electronics. Here, a direct-write laser patterning process is developed to make conductive molybdenum carbide-graphene (MCG) composites directly on paper substrates. The hierarchically porous MCG structures are converted from fibrous paper soaked with the gelatin-mediated inks containing molybdenum ions. The resulting Mo C and graphene composites are mechanically stable and electrochemically active for various potential applications, such as electrochemical ion detectors and gas sensors, energy harvesters, and supercapacitors. Experimentally, the electrical conductivity of the composite is resilient to mechanical deformation with less than 5% degradation after 750 cycles of 180° repeated folding tests. As such, the direct laser conversion of MCGs on papers can be applicable for paper-based electronics, including the 3D origami folding structures.
多功能且低成本的制造工艺/材料对于纸质电子产品的发展至关重要。在这里，开发了一种直接激光图案化工艺，可将导电碳化钼-石墨烯（MCG）复合材料直接制作在纸张基底上。分层多孔的 MCG 结构是由浸泡在含有钼离子的明胶介导油墨中的纤维纸转化而来的。所得到的 MoC 和石墨烯复合材料具有机械稳定性和电化学活性，可用于各种潜在应用，例如电化学离子探测器和气体传感器、能量收集器和超级电容器。实验中，复合材料的电导率在经受 750 次 180°重复折叠测试后，其机械变形的耐用性可抵抗小于 5%的降解。因此，MCG 在纸张上的直接激光转换可适用于基于纸张的电子设备，包括 3D 折纸结构。
