Li Kai, Wang Dazhi, Yi Shanshan, Jia Haoran, Qian Jianghong, Du Zhiyuan, Ren Tongqun, Liang Junsheng, Martinez-Chapa Sergio O, Madou Marc
Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116024, China.
School of Engineering and Sciences, Tecnológico de Monterrey, Nuevo León, P.C. 64700, Mexico.
Rev Sci Instrum. 2019 Nov 1;90(11):115001. doi: 10.1063/1.5090415.
In this work, an instrument of drop-on-demand electrohydrodynamic jet (DoD E-Jet) printing device equipped with a current measurement and control system was designed and developed for finely controlling the printing process. The relationships between the current and printing parameters of voltage, frequency, and flow rate were deeply investigated, and the examination data and conclusion were obtained under the condition of the needle size remaining unchanged. Especially, the equation relationship between the flow rate and current was established, which can be used for the modification of the DoD E-Jet printing process. The map describing the stable printing range, droplet size, and current was also recognized, which can help us to select parameters for stable printing. Based on the current measurement and control system and the established relationship, the optimized current and printing parameters were chosen to print uniform graphene microstructures. This instrument provides an effective method for monitoring, adjusting, and controlling the DoD E-Jet printing process and further improving the quality of the printed structures for micro/nanoelectromechanical system (M/NEMS) devices.
在这项工作中，设计并开发了一种配备电流测量与控制系统的按需滴注式电流体动力喷射（DoD E-Jet）打印设备，用于精确控制打印过程。深入研究了电流与电压、频率和流速等打印参数之间的关系，并在针头尺寸保持不变的条件下获得了检测数据和结论。特别是建立了流速与电流之间的方程关系，可用于改进DoD E-Jet打印过程。还识别出了描述稳定打印范围、液滴尺寸和电流的图谱，这有助于我们选择稳定打印的参数。基于电流测量与控制系统以及建立的关系，选择了优化的电流和打印参数来打印均匀的石墨烯微结构。该仪器为监测、调整和控制DoD E-Jet打印过程以及进一步提高微纳机电系统（M/NEMS）器件打印结构的质量提供了一种有效方法。
