Two-Photon Polymerization Direct Laser Writing

Dear Colleagues,

This Special Issue aims to highlight the latest achievements in two-photon polymerization direct laser writing (TPP-DLW). Among the tools available for the fabrication of microstructures, TPP-DLW enjoys a series of characteristics that make it unique. As an additive manufacturing process, for example, TPP-DLW can achieve “true” three-dimensional writing for the realization of complex objects without the need for a layer-by-layer approach. Furthermore, it can print jobs with the highest precision, enabling feature sizes as small as 100 nm in a relatively straightforward manner. Thus, when compared with competitive technologies, TPP-DLW is highly attractive for the realization of three-dimensional microstructures because of the excellent reproduction fidelity. While micro-stereolithography, laser sintering, and inkjet printing allow layer-by-layer three-dimensional writing, they are not capable of depositing materials with dimensions smaller than few microns. Alternatively, lithographic processes with the highest writing resolution such as electron beam lithography are limited to the fabrication of essentially two-dimensional microstructures. Due to its strengths, TPP has evolved in recent years from an academic technique employed primarily by laser specialists into a useful tool for scientists and engineers working across a wide range of research fields. This Special Issue seeks to showcase review articles, research papers, and short communications that focus on the development of novel materials and innovative devices in wide-ranging applications. Furthermore, contributions describing hybrid manufacturing methods that couple TPP-DLW with alternative techniques are welcome.

Dr. Tommaso Baldacchini
Prof. Christopher N. LaFratta
Guest Editors

Manuscript Submission Information

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• 3D printing by two-photon polymerization
• Microfluidics
• Polymerization
• Photochemistry
• Photonic and mechanical metamaterials
• Bio-inspired devices
• Hydrogel-based microstructures
• Functional materials
• Additive and substractive manufacturing
• Microelectromechanic systems
• Sensors and actuators
• Surface chemistry