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Metallic nanoparticles have been used as glass colorants since the Roman Empire. One of the most famous pieces of pottery from the period is the Lycurgus cup. The nanoparticles embedded in this cup have an optical peculiarity, presenting different colours depending on the angle of the illumination. This effect is called dichroism. Now, scientists from Wageningen University & Research have made 3-D printed objects showing this dichroic effect.
The researchers synthesized a special type of gold nanoparticle with different sizes. These nanoparticles were then embedded in a common 3-D printing material (PVA) used in standard, off-the-shelf 3-D printers.
Amount - Gold - Material - Percent - Amount
The amount of gold in the material is minute, a mere 0.07 weight percent. Such a small amount of gold doesn't change the printability of the material, which is the same as normal material. However, even with this minimal amount of...
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