Quantum Dots Facilitate 3D Two‐Photon Laser Lithography

• DOI: 10.1002/adma.202211702
• Publication Date: 2023-04-12T09:14:13Z
• Authors: Ye Yu; Anatol Prudnikau; Vladimir Lesnyak; Robert Kirchner
• Keywords: Laser linewidth

In the past two decades, direct laser writing (DLW) technologies have seen tremendous growth. However, strategies that enhance printing resolution and development of material with assorted functionalities are still sparser than expected. Herein, a cost-effective method to tackle this bottleneck is presented. Semiconductor quantum dots (QDs) selected carry out task, most importantly via surface chemistry modification enable their copolymerization themonomers, resulting in transparent composites. The evaluations indicate QDs show great colloidal stability photoluminescent properties well-preserved. This allows further exploration characteristics such composite material. It shown presence QDs, provides much lower polymerization threshold faster linewidth growth, indicating form synergetic relationship monomer photoinitiator, widening dynamic range thus increasing efficiency for broader fields applications. Lowering reduces minimum achievable feature size by ≈32%, which well-matched STED-based (i.e., stimulated-emission depletion microscopy) methods 3D structures. study elucidates mechanism behavior, guiding future functional materials DLW-related technologies.