Fig. 2 | Nature Communications

Fig. 2

From: Inkjet-printed unclonable quantum dot fluorescent anti-counterfeiting labels with artificial intelligence authentication

Fig. 2The alternative text for this image may have been generated using AI.

Optical characterization. a Fluorescence spectra and b time-resolved fluorescence decay measurements of red, green, and blue emission quantum dot (QD) inks excited at 375 nm. c Transmittance spectra of ITO coated glass substrates before and after inkjet printing of red, green, and blue emission Fuzhou University logos (Inset: photographs of the four samples under ambient light). d–i Fluorescence images of red, green, and blue emission d–f Fuzhou University logos and g–i two-dimensional QR codes and bar codes. The Fuzhou University logos, QR codes and bar codes, composed of thousands of dot patterns (pixels), are adapted with permission of the Fuzhou University. The scale bar is 1 cm

Back to article page