Deposición selectiva de gotitas cargadas para impresión programable y regrabable de matrices de microestructuras con...

Patterned microstructure arrays are widely used in flexible electronics, optics, and biosensing, yet fabrication still relies on costly, process-intensive methods (e.g., photolithography) with limited reconfigurability. In this work, we introduce a method for the selective deposition of charged droplets via residual-charge-induced electric field control (SDREC), enabling microstructure-array patterning with a resolution of 20 µm through the controlled assembly of charged microdroplets on silk fibroin surfaces. As a proof of concept, a programmable 5×5 pixel array was fabricated, demonstrating reversibility through erasure and rewriting. By transferring the patterned microstructures onto a shape memory polymer, we further achieved information storage and optical encryption/decryption. In addition, pre-deposition of silver nanoparticles within the patterned areas enabled the fabrication of silver electrodes. Overall, the SDREC strategy offers advantages such as high resolution, structural reconfigurability, and multifunctionality, providing a promising approach for the rapid construction of high-precision microstructured devices.