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Inside Cover: Writing Self‐Erasing Images using Metastable Nanoparticle “Inks” (Angew. Chem. Int. Ed. 38/2009)
Author(s) -
Klajn Rafal,
Wesson Paul J.,
Bishop Kyle J. M.,
Grzybowski Bartosz A.
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200990197
Subject(s) - metastability , nanoparticle , inkwell , materials science , polymer , nanotechnology , cover (algebra) , chemical engineering , chemistry , composite material , organic chemistry , mechanical engineering , engineering
Light‐sensitive inks for self‐erasing images are formed from metal nanoparticles (NPs) covered with photoswitchable ligands dispersed in a polymer film, as described by B. A. Grzybowski and co‐workers on page 7035 ff. Upon exposure to UV light, the NPs form metastable aggregates; the apparent color corresponds to the degree of aggregation. In the absence of light, the aggregates fall apart and the images gradually self‐erase. Multicolor images can be also be created with a single NP ink.