Strong, tough and bio-degradable polymer-based 3D-ink for fused deposition modeling (FDM) using inorganic WS2 nanotubes.WS2-NT are metals dichalcogenides nanotubes (NT) of the shape MX2 (M = transition metal, Mo, W, etc.; X = S, Se, Te). In its tube form, WS2 is a semiconductor, nontoxic, and ...