Spatially Encoded Micromaterials via Two-Photon Crosslinking

The fabrication process is segmented into multiple sequential steps: first forming a scaffold structure, then selectively modifying specific regions with different materials or properties. This allows complex functional devices to be built from simpler structural components through staged fabrication.

The method enables spatially selective modification of the scaffold where different regions acquire different chemical compositions, structures, or functionalities through controlled material exchange and selective crosslinking, allowing local property optimization without redesigning the entire structure.

A universal scaffold structure is fabricated first using a single photosensitive material, establishing the geometric framework before any functional materials are introduced. This preliminary structural formation simplifies the overall process by decoupling structural design from functional material selection.

The scaffold is subsequently combined with multiple different photosensitive materials through selective infiltration and crosslinking, creating a composite structure where each region can have optimized material properties for its specific function while maintaining a unified structural framework.

Different regions of the device are assigned specific functional materials with distinct properties (e.g., actuating, sensing, energy generation) through selective crosslinking and material exchange, transforming a passive structure into an active multifunctional system with spatially distributed capabilities.

The scaffold structure serves as a universal platform that can accommodate multiple different functional materials and perform multiple functions simultaneously, enabling a single device to integrate actuation, sensing, and energy generation capabilities through material selection rather than structural redesign.