Department of Chemical and Biomolecular Engineering , University of Nebraska-Lincoln , Lincoln , Nebraska 68588 , United States.
ACS Appl Mater Interfaces. 2018 Apr 25;10(16):14193-14199. doi: 10.1021/acsami.8b03038. Epub 2018 Apr 16.
Microcontact printing (μCP) is a valuable technique used to fabricate complex patterns on surfaces for applications such as sensors, cell seeding, self-assembled monolayers of proteins and nanoparticles, and micromachining. The process is very precise but is typically confined to depositing a single type of ink per print, which limits the complexity of using multifunctionality patterns. Here we describe a process by which two inks are printed concomitantly in a single operation to create an alternating pattern of hydrophobic and hydrophilic characteristics. The hydrophobic ink, PDMS, is deposited by evaporation on the noncontact region, while the hydrophilic polyelectrolyte is transferred on contact. We demonstrate that there is no gap between the two patterns using an optical-electrochemical method. We describe some potential applications of this method, including layer-by-layer deposition of polyelectrolytes for sensors and creation of a scaffold for cell culture.
微接触印刷（μCP）是一种在表面上制造复杂图案的有价值的技术，可用于传感器、细胞接种、蛋白质和纳米粒子的自组装单层以及微加工等应用。该过程非常精确，但通常仅限于每次印刷沉积一种类型的墨水，这限制了使用多功能图案的复杂性。在这里，我们描述了一种在单次操作中同时印刷两种墨水以创建疏水性和亲水性特征交替图案的方法。疏水墨水 PDMS 通过蒸发沉积在非接触区域，而亲水聚电解质通过接触转移。我们使用光电化学方法证明两种图案之间没有间隙。我们描述了这种方法的一些潜在应用，包括用于传感器的聚电解质的层层沉积和细胞培养支架的创建。
