Counterfeiting of currency, valuable documents, and branded products remains an
extremely challenging concern for governments, companies, and consumers worldwide …

A new material concept of soft crystals is proposed. Soft crystals respond to gentle stimuli
such as vapor exposure and rubbing but maintain their structural order and exhibit …

Abstract Information recording on paper has always been the most important approach to
keep records of human activity and to spread civilization. With the progress of science and …

Selective and sensitive moisture sensors have attracted immense attention due to their
ability to monitor the humidity content in industrial solvents, food products, etc., for regulating …

Inkless and erasable printing as a new technology has received intense attention in
reducing paper waste and environmental hazards caused by the use of large amounts of …

The challenge to prevent the counterfeiting of documents and the development of flexible
printed electronics are two thrust research areas that demand innovative techniques. This …

A new concept for difficult-to-replicate security inks for use in advanced anti-counterfeiting
applications is presented. Inks fabricated from a mixture of photoactive dyes result in a …

Amines are ubiquitous in biological world, but are toxic and harmful in nature. Detection of
biogenic amines that are released from spoiled seafood, meat, or dairy products is an …

We report the synthesis and vapochromic behaviors of film materials consisting of
hypervalent tin-containing π-conjugated polymers. We prepared copolymers with …

The reversible color change of the solid-state emission upon exposure to mechanical stimuli
is called mechanochromic luminescence (MCL). In spite of the recent growing interest in …