Inkjet-printed multi-wavelength thermo-plasmonic images for anti-counterfeiting applications
Hongki Kang, Jee Woong Lee, Yoonkey Nam*
This work was led by Dr. Kang in collaboration with Jee Woong. We used two different types of gold nano-particles tuned at different wavelengths (ViS vs. NIR) so that nano-particles can generate heat at specific light. Using an optimized inkjet printing for gold nanoparticles, we we were able to print desired patterns or codes on substrates and the patterns can be decoded through wavelength specific thermal images. We demonstrated that this platform can be applied for anti-counterfeiting applications.
Source: Kang et al.,ACS Applied Materials & Interface, 2018. (link)