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The development of smart inks that change color and transparency in response to external stimuli is important in safety and anticounterfeiting. In article number 2003980, Kwang‐Un Jeong and co‐workers demonstrate that a secret code, written with thermoresponsive and polarization‐dependent secret inks consisting of imidazolium‐functionalized diacetylenes, can be deciphered by wearing polaroid glasses...
The development of smart inks that change color and transparency in response to external stimuli is very important for various fields, from modern art to safety and anticounterfeiting technology. A uniaxially oriented diacetylene thin film on a macroscopic area is obtained by coating, self‐assembling and topochemical photopolymerizing of imidazolium‐functionalized diacetylenes (M‐DA and T‐DA) and...
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