Making Vanadium Dioxide for Security Printing and Anti-Counterfeiting Using Physical Vapor Deposition
Physical vapor deposition (PVD) is a process that is used to apply a thin metallic coating from a target onto a substrate. In this case Vanadium was used as the target and mixed with the oxygen pumped into the vacuumed bell jar to create Vanadium Dioxide (VO2) by PVD. Vanadium Oxides are thermochromic materials that go through a reversible phase change at a specific temperature. VO2 is a material whose color, volume, magnetic and electrical properties change when the temperature reaches a specific temperature where the crystal structure changes. These property changes and using PVD to make thin films make VO2 an interesting material and process for potential use in security printing and anti-counterfeiting.
Ludwig, Sierra, "Making Vanadium Dioxide for Security Printing and Anti-Counterfeiting Using Physical Vapor Deposition" (2016). 2016 Undergraduate Research and Scholarship Conference. Paper 8.
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