Tag: anti-counterfeiting

Researchers at Nottingham Trent University have developed mixable, room-temperature luminescent ionic liquids containing lanthanide elements that could underpin harder-to-copy optical ...

A dual-band metasurface from The Hebrew University of Jerusalem independently controls mid-wave and long-wave infrared emission at the pixel level, ...

Researchers have engineered a lead-free zero-dimensional metal halide whose upconversion emission switches from green to red in humid air only ...