Systematic Design of a Graphene Ink Formulation for Aerosol Jet Printing
Systematic Design of a Graphene Ink Formulation for Aerosol Jet Printing
复制标题
DOI：
10.1021/acsami.2c18838
复制
发表时间：
2023-01-06
影响因子：
9.5
通讯作者：
Secor, Ethan B.
中科院分区：
文献类型：
--
作者：
Gamba, Livio;Johnson, Zachary T.;Secor, Ethan B.
气溶胶喷射打印是一种非接触式、数字化、增材制造技术，适用于各种功能材料。虽然很有前途，但使用这种技术的新材料和设备的开发仍然受到有限的合理油墨配方的阻碍，最近的研究主要集中在设备演示，而不是基础工艺科学。在本工作中，报道了一种系统的方法来配制聚合物稳定的石墨烯油墨，该方法考虑了溶剂组合物对分散、流变学、润湿、干燥和驱动过程结果的相分离特性的影响。发现由乙酸异丁酯、二甘醇二甲醚、二氢左旋葡萄糖酮和甘油组成的四组分溶剂混合物支持有效的油墨雾化和受控的在线干燥，以减少过喷和润湿不稳定性，同时保持高分辨率和电导率，从而克服气溶胶喷射印刷常见的沉积速率和分辨率的折衷。印刷生物化学传感器用于农药对硫磷的电流检测，检测限为732 nM，灵敏度为34 nA μ M-1，证明了这种石墨烯墨水用于制造功能性电子器件的可行性。
Aerosol jet printing is a noncontact, digital, additive manufacturing technique compatible with a wide variety of functional materials. Although promising, development of new materials and devices using this technique remains hindered by limited rational ink formulation, with most recent studies focused on device demonstration rather than foundational process science. In the present work, a systematic approach to formulating a polymer-stabilized graphene ink is reported, which considers the effect of solvent composition on dispersion, rheology, wetting, drying, and phase separation characteristics that drive process outcomes. It was found that a four-component solvent mixture composed of isobutyl acetate, diglyme, dihydrolevoglucosenone, and glycerol supported efficient ink atomization and controlled inline drying to reduce overspray and wetting instabilities while maintaining high resolution and electrical conductivity, thus overcoming a trade-off in deposition rate and resolution common to aerosol jet printing. Biochemical sensors were printed for amperometric detection of the pesticide parathion, exhibiting a detection limit of 732 nM and a sensitivity of 34 nA mu M-1, demonstrating the viability of this graphene ink for fabricating functional electronic devices.