WASHINGTON, D.C., Jan. 13, 2021 — A laser-powered polymerization process for 3D-printing applications overcomes the need to build a 3D-printed object one layer at a time. A research team from France’s Fresnel Institute and École Centrale de Marseille introduced the method, using it to create miniature models of a bicycle and even the Eiffel Tower from silica glass. The approach is specifically based on multiphoton polymerization, which ensures that the polymerization process, which binds liquid monomer molecules into a polymer solid, occurs only at a precise laser focal point. 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